Tropical Health Matters

Solomon Afolabi, a graduating MPH student from the JHU Bloomberg School of Public Health examined the challenge of epidemics and outbreaks in Africa with special reference to Uganda as an example. The abstract of his report is found below.

According to the WHO, preparedness for emergency health conditions like infectious disease outbreaks should be an ongoing action supported by adequate funding, resources, partnerships, and political will that is executed at all levels to keep it sustained. Emergency preparedness is a framework that identifies practical in-country health emergency preparedness principles and elements by acknowledging lessons learned from previous response activities for priority planning, implementation, and reinforcing operational capacities.

Uganda is an ecological hotspot for various infectious diseases making the country liable to outbreaks. In the last two decades, multiple significant outbreaks have occurred, prominent of which are from yellow fever, Ebola virus disease, and COVID-19 global pandemic. Efforts to build a strategic framework for emergency outbreak preparedness and to strengthen the national operational capacity led to the establishment of the Ugandan National Institute of Public Health (UNIPH) in 2013.

This paper presents a blend of literature that takes account of the successes, challenges faced, and gaps identified in the preparedness and response capacities to the infectious disease outbreaks experienced in the last two decades. It also reviewed how the national efforts had fared in operational readiness for an emergency response to epidemics, building a resilient health system, practicing the One-Health human-animal-environment interface, and in government, community, and individual capacities to contribute effectively to strengthen the national emergency preparedness and response to these frequent disease outbreaks. The findings revealed that Uganda’s outbreak preparedness had made much progress over two decades, from the overwhelming Sudan strain Ebola virus outbreak in 2000-2001 to a similar episode from the same species in 2022 to 2023.

The response measures that feature the activation of a national response plan by the MoH were well coordinated locally to swiftly lead to the activation of NTF, NRRT, DTF, DRRT, and VHTs for immediate mobilization and deployment of operational resources to affected districts. The response was strengthened by well-organized local coordination by the MoH and development partners (WHO, CDC, UN agencies, etc.). The immediate setting up of treatment and isolation centers, provision of Ebola kits, training of more health workers, and coverage of 10 high-risk districts ensured a significant impact.

The provision of more than 5000 doses of vaccines with the support of WHO and partners was a global capacity milestone impact, and the country was declared Ebola-free in a record 69 days. Uganda’s current national emergency preparedness and response plan has received commendations locally and from global international partners, having progressively built capacity from lessons learned in just over a decade of responding to frequent infectious disease outbreaks and using the recommendations proffered accordingly.

This sustained momentum of preparedness supported the swift transition to contain COVID-19 and laid a good foundation for their strengthened readiness for an emergency response to outbreaks.

The Demographic and Health Survey Program has released final and summary reports for both DHS and Malaria Indicator Surveys (MIS) for 2021 from several malaria endemic African countries. Below is a brief summary of some of the findings from Madagascar, Nigeria, Burkina Faso, Mali, Côte d’Ivoire, and Senegal. Click the link on each country to download a copy for yourself.

The proportion of the population who slept under an insecticide treated bednet the night before the survey varied. In Madagascar it was 49%, While in Nigeria it was 59%. Mali achieved the highest coverage at 73%, while Burkina Faso had the lowest previous night coverage at 41%.

Senegal showed a worrying decrease from 63% in 2016 to 46% in 2021. Côte d’Ivoire did not report total household use, but indicated that 72% of homes had at least one net, with 58% of children below 5 years of age and 64% of pregnant women sleeping under them.

At least three doses of sulfadoxine-pyremethamine is recommended for Intermittent preventive treatment of malaria in pregnant women. The national average was 38% for at least 3 doses in Senegal, although ironically 92% had been reached with the first dose. In Mali only 35% received at least a third dose. Burkina Faso started out with 92% for the first dose, but reached 57% with three or more. Côte d’Ivoire started with 80% receiving their first dose and concluded with only 35% receiving a third. Both Madagascar and Nigeria had the lowest 3-dose coverage at 31%.

Malaria testing and treatment using rapid diagnostic tests and artemisinin-based combination therapy (ACT) was reported. Nigeria demonstrates the challenges of following guidelines. Although 63% of children under 5 years of age were reported to have had a fever in the two weeks preceding the survey, only 24% of those received a diagnostic test. The summary results report that 74% of those with fever “who took any anti-malaria medicine” used the recommended ACT. The implication is that many received medicine without confirmatory testing such that some may have gotten ACT who needed another medicine and some who actually had malaria may have missed the correct treatment.

A similar low level of testing was seen in Senegal (22%), Mali (23%), and Madagascar (20%). Côte d’Ivoire reported 38% of febrile children having been tested. Burkina Faso performed better for testing with 65%.

These brief findings indicate that implementation of Malaria interventions are far from ideal. We know that some of the blame can be placed on health service disruptions due to demands of COVID-19 activities by health ministries and partners. Still, with 8 years remaining until 2030, Reinvigorated efforts are needed in all endemic countries if these six examples are indicative of the challenges we face.

Andaratu Wuni has contributed this posting to the Blog site for the JHU site for the course Social and Behavioral Foundations of Primary Health Care.

(Graphic source: https://www.aafp.org/news/health-of-the-public/20210429vacchesitancy.html)

Covid 19 has unarguably wrecked devastating consequences globally since its emergence and has proven to to be a ubiquitous public health health problem. Vaccination against the virus has been shown to be the most effective way of limiting severe disease and mortality. However the spate of vaccine hesitancy in Ghana has continued to rise in the last year. The World Health Organization defines vaccine hesitancy as the delay in acceptance or refusal of vaccination despite availability of vaccination services. This public health problem has far reaching consequences not only in Ghana but globally. Currently the vaccine hesitancy rate in Ghana is about 30% and counting! with people 25 years and under leading the hesitancy core.

(Graph Source: https://figshare.com/articles/thesis/Examining_drivers_of_COVID-19_vaccine_hesitancy_in_Ghana/14494851)

Since Ghana rolled out vaccines to the general public over one year ago, only 25.9% of the population have been fully vaccinated as of August 19,2022.Ghana has a target of vaccinating 22.9million eligible Ghanaians; that is about 60% of the population in order to achieve herd immunity, however only 8.2 million Ghanaians have been fully vaccinated to date.

Many reasons account for the rise in covid 19 vaccine hesitancy in Ghana; from the depletion of rigorous and continuous education and the consequent lack of community engagement, relaxation of covid 19 protocols, to vaccine misinformation and conspiracy theories as well as political influence. It is time for a policy that will mitigate this crucial problem, which the WHO(before the covid pandemic) described as one of the top ten greatest threats to global health.

The truth is, a single policy may not totally solve the problem as the issue of vaccine hesitancy is a complex one. The best approach will be for policymakers to enact policies to make vaccination a condition for other essential services in Ghana.

Intensify mandatory vaccination especially in high risk individuals and high risk locations, eliminate vaccine exemptions based on all but health related reasons, commit to structured community engagements and outreaches using the key stakeholders like the Ghana Medical Association and the Public Health association of Ghana, use stakeholders like UNICEF Ghana and the Ghana Health Service to disseminate accurate and scientifically proven vaccine information and last but not least introduce incentives for citizens who take the vaccine.

As mentioned previously, the TiPToP malaria in pregnancy project of Jhpiego and Unitaid has been adjusting to the COVID-19 pandemic by training health workers to be more conscious of infection prevention skills. The abstract below is being presented at the 2021 American Society of Tropical Medicine and Hygiene Annual Meeting outlines what is happening with clinic attendance. See Author List below.

COVID-19 disrupted public health interventions and weakened global and national health systems. We used a mixed-methods study to explore factors related to changes in health facility attendance during the COVID-19 pandemic in three local government areas (LGAs) in Nigeria: Ohaukwu, Akure South and Bosso.

Three hundred fifteen pregnant women seen for antenatal care (ANC) in November 2020 participated in a survey about their attendance before and during the pandemic; 198 women participated in focus group discussions (FGDs). One quarter of women surveyed reported that they reduced the frequency of their visits or did not visit during the pandemic.

The biggest reported changes in visits were for immunization (47% visited before the pandemic versus 30% during the pandemic, p<0.001) and other outpatient services (66% to 57%, p=0.027), with small but statistically significant declines in ANC (99% to 94%, p=0.002) and family planning (11% to 5%, p=0.002). Both LGA and religion were significantly correlated with reduced/no visits during the pandemic; other socio-demographic characteristics were not. Whereas 33% of Christian women reported reduced/no care seeking, only 7% of Muslim women did (p<0.001).

Women in Ohaukwu were most likely to report reduced/no visits (39%), followed by those in Akure South (26%), and Bosso (7%) (p=0.012). During FGDs transport issues, proximity to health facilities, and fear of contracting COVID-19 or being labeled as COVID-positive were the most common reasons mentioned for not seeking care during the pandemic.

Differences by LGA are likely related to differences in both levels of transmission and the State-level response to the pandemic. Ebonyi state, where Ohaukwu is located, had the longest lockdown and most restricted movement; better understanding of differences in the pandemic and state response could inform future actions.

The FGDs findings highlight the need for health systems to consider how to facilitate service utilization during a pandemic, such as providing safe transport or increasing outreach, and to minimize stigma for those seeking care.

AUTHOR LIST

Bright Orji 1, Elizabeth Oliveras 2, Emmanuel Ugwa 3, Aishatu Bintu Gubio 4, Edima Akpan 5, Bartholomew Odio 1, Herbert Onuoha 1, Ibrahim Idris 6, Emmanuel Dipo Otolorin 1, Elaine Roman 2 1Jhpiego, Abuja, Nigeria, 2Jhpiego, Baltimore, MD, United States, 3Federal Medical Center, Birnin kudu, Jigawa state, Nigeria, 4National Malaria Elimination Program, Federal Ministry of Health, Abuja, Nigeria, 5Reproductive Health Division, Federal Ministry of Health, Abuja, Nigeria, 6Niger State Ministry of Health, Minna, Nigeria

The TiPToP malaria in pregnancy project of Jhpiego and Unitaid has been adjusting to the COVID-19 pandemic. Their abstract below is being presented at the 2021 American Society of Tropical Medicine and Hygiene Annual Meeting and explains the use of bulk SMS to support health worker knowledge retention on antenatal care and the use of intermittent preventive treatment of malaria in pregnancy during COVID-19 in Bosso local government area of Niger State, Nigeria. See Author List below.

In light of COVID-19 travel restrictions, bulk SMS were used to support knowledge retention of health workers following an in-person training held before the pandemic. In December 2019, 72 facility health workers and 260 community health workers (CHWs) in Bosso local government area of Niger State, Nigeria participated in a 12-day training about benefits of early antenatal care (ANC) attendance, CHW referrals to ANC, and use of intermittent preventive treatment in pregnancy (IPTp) with sulphadoxine-pyrimethamine to prevent malaria.

In-person supervision visits were conducted 3 months following training, although three months later in-person supervision was no longer possible due to COVID-19 related travel restrictions. Post-training support transitioned to use of bulk SMS which were sent twice a week to each cadre for two 3-month rounds of messaging.

Knowledge tests comprised of 10 multiple choice questions linked to key ANC and IPTp guidelines were administered at 5 time points: 1) baseline; 2) post-training; 3) at in-person supervision visit 3 months after training; 4) after first round of bulk SMS (6 months post-training); and 5) after second round of bulk SMS (9 months post-training).

Average test scores for each cadre were calculated at each time point and T-tests were used to assess differences in scores. The results show that facility health workers scored an average of 53% on the pre-test followed by scores of 76%, 74%, 86%, and ending at 80% 9 months following training. CHWs started with an average score of 49% which increased to 67% post-training; subsequent average scores were 83%, 74%, and 94%.

Results were compelling with facility health worker knowledge improving from 76% immediately post-training to 80% 9 months later (p-value<0.05) and for CHWs the improvement was from 67% to 94% (p-value<0.05). These findings suggest that use of SMS can support knowledge retention of key ANC and IPTp guidelines following an in-person training. Program managers, trainers and supervisors may consider using this approach to support health workers where resources and/or movement are restricted.

AUTHOR INFORMATION:

Charity Anoke 1, Orji Bright 1, Joseph Enne 1, Bartholomew Odio 1, Christina Maly 2, Amina Zimro 3, Ibrahim Idris 3, Elizabeth Njoku 1, Oniyire Adetiloye 1, Emmanuel Dipo Otolorin 1, Elaine Roman 2  — 1Jhpiego, Abuja, Nigeria, 2Jhpiego, Baltimore, MD, United States, 3Niger State Ministry of Health, Minna, Nigeria

Katherine Wolf and colleagues address the need for mentoring in malaria programs across three countries when COVID-19 restricts travel and in-person work. They presented at the 69^th Annual Meeting of American Society of Tropical Medicine and Hygiene and share the information below on e-mentoring.

After the COVID-19 pandemic emerged in March 2020, global health experts warned that significant disruptions to malaria programs could lead to a doubling of malaria deaths in 2020, with a major spike overwhelming fragile health systems. To ensure the continuity and safety of malaria service delivery during the pandemic and associated lockdowns, Zimbabwe, Cote d’Ivoire (CI), and Cameroon transitioned from in-person, facility-based mentorship for health care providers to phone-based e-mentorship.

Working with the 3 National Malaria Control Programs, an e-mentoring package was developed and provided to mentors including technical guidance on malaria service delivery during COVID-19, a sample call guide, and a call tracker. Mentorship calls focused on continuity of malaria service delivery and applying WHO and PMI COVID-related guidance on triaging of patients and infection control measures.

From April to June, Zimbabwe reached 134 providers in 24 of 25 health facilities that previously received in-person mentorship. CI reached 41 providers in 33 facilities, where mentors already worked with staff in-person. Cameroon reached 179 providers in 116 lower performing facilities. In Zimbabwe, e-mentorship identified malaria commodity shortfalls and over-stocking, and facilitated re-distribution. Mentors advocated successfully for provision of PPE.

E-mentorship identified a facility that had incorrectly stopped providing routine services; mentors were able to clarify COVID-related guidance from central authorities and assist in re-establishing routine services. In CI, the most frequently discussed topics were malaria commodities and case management. In Cameroon, frequent stockouts reported were better understood, and national stakeholders contacted for better solutions, including redeployment of medicines and commodities from overstocked sites to stocked-out areas.

All 3 countries demonstrated that e-mentorship successfully offers health care providers support and guidance to deliver quality malaria services during a crisis. Lessons learned can be applied in the context of natural disasters, political instability, and other potential disruptions to malaria programs.

Authors and Affiliations

Katherine Wolf¹, Chantelle Allen², Gilson Mandigo³, Leocadia Mangwanya³, Cyprien Noble¹, Eric Tchinda⁴, Mathurin Dodo⁵, Arthur Konan¹, Jacques Kouakou⁶, Lolade Oseni^1
1Jhpiego/Impact Malaria, Baltimore, MD, United States, ²Jhpiego, Baltimore, MD, United States, ³ZAPIM/Jhpiego, Harare, Zimbabwe, ⁴Jhpiego/Impact Malaria, Kribi, Cameroon, ⁵Jhpiego/Impact Malaria, Ouagadougou, Burkina Faso, ⁶Jhpiego/Impact Malaria, Abidjan, Côte D’Ivoire

The search for adjunctive therapy to aid in recovery from cerebral malaria is explored in Malaria Journal. A faster acting crystalline form of an insecticide is studied. In Nigeria the National Malaria Elimination Program advocates for equal footing with COVID-19 action. Links to full stories and abstracts are found below.

Dimethyl fumarate reduces TNF and Plasmodium falciparum induced brain endothelium activation in vitro

Neida K. Mita-Mendoza, and colleagues studied Cerebral malaria (CM) which is associated with morbidity and mortality despite the use of potent anti-malarial agents. Brain endothelial cell activation and dysfunction from oxidative and inflammatory host responses and products released by Plasmodium falciparum-infected erythrocytes (IE), are likely the major contributors to the encephalopathy, seizures, and brain swelling that are associated with CM. The development of adjunctive therapy to reduce the pathological consequences of host response pathways could improve outcomes.

To accurately reflect clinically relevant parasite biology a unique panel of parasite isolates derived from patients with stringently defined CM was developed. The effect of TNF and these parasite lines on primary human brain microvascular endothelial cell (HBMVEC) activation in an in vitro co-culture model was tested. HBMVEC activation was measured by cellular release of IL6 and nuclear translocation of NF?B. The transcriptional and functional effects of dimethyl fumarate (DMF), an FDA approved drug which induces the NRF2 pathway, on host and parasite induced HBMVEC activation was characterized. In addition, the effect of DMF on parasite binding to TNF stimulated HBMVEC in a semi-static binding assay was examined.

The findings provide evidence that targeting the nuclear factor E2-related factor 2 ( NRF2) pathway in tumour necrosis factor (TNF) and parasite activated human brain microvascular endothelial cell (HBMVEC) mediates multiple protective pathways and may represent a novel adjunctive therapy to improve infection outcomes in CM.

Fast-acting insecticide polymorph could boost malaria-control efforts

Chemistry World reports on a faster-acting version of a common insecticide could boost malaria control efforts. The new crystalline form of deltamethrin is absorbed by mosquitoes 12 times faster than commercial forms and could help to limit malaria transmission despite growing rates of insecticide resistance.

Microcystals of contact insecticides like deltamethrin are crucial ingredients in indoor sprays and treated bed nets used to combat malaria-spreading mosquitoes. But many mosquito populations are developing resistance to these compounds, which is harming efforts to control the disease.

Treat Malaria as National Health Emergency, NEMP tells Federal Government

The Coordinator of National Malaria Elimination Programme (NEMP), has asked the federal government to tackle malaria as a national health emergency in the same manner COVID-19 pandemic is being handled. Against the background of increasing poverty in the country, Civil Society in Malaria Control, Immunisation and Nutrition (ACOMIN) has said there is a direct linkage between malaria scourge and the level of poverty in communities.

Speaking at a meeting with the civil society group involved in anti malaria advocacy, Coordinator of NEMP, said the current level of funding of the health sector by government is unacceptably low.

News and abstracts provide more on the surge of malaria in Mali. COVID-19 complicates malaria elimination in Southeast Asia. Peace Corps health care for volunteers in Comoros is questioned. Malaria risk in Ecuador is investigated. Risk maps are used/not used in three Sub-Saharan countries. The potential of microbiological control is considered. More information on each topic is available in the links provided.

Health workers raise alarm over surge in malaria cases, deaths in Mali

More details emerge on malaria in northern Mali. Medical workers in Mali raised an alarm over a surge in malaria cases which has seen at least 23 people killed by the disease in just the past one week. About 13,000 malaria cases were reported in the north by medical workers between September 21 and 27, representing an 88 percent increase in cases from the previous week. 59 people have died of malaria in the nation’s northern region since the beginning of the year, according to the ministry, which confirmed the deaths of the 23 people over the aforementioned September period.

Will COVID-19 hamper ASEAN’s fight to eliminate malaria?

Although progress elsewhere in the world has been slow, in the Asia-Pacific, deaths due to the mosquito-borne disease have dropped by 70% and cases have dropped by 22%. Within ASEAN, those figures—according to the Asia Pacific Leaders Malaria Alliance (APLMA)—are 92% and 67% respectively. The battle to eliminate malaria is continually evolving with different species of disease-carrying mosquitoes and parasites presenting new challenges. In 2008, a new strain of malaria that proved resistant to the anti-malarial drug artemisinin, nicknamed “super malaria”, emerged in Cambodia. It spread through the Greater Mekong region into Laos, Thailand and Vietnam and by 2017, it had developed resistance to another drug, piperaquine.

In response, scientists and researchers focused their resources on areas where the new strain was present and were making headway towards eliminating it. COVID-19 could threaten that progress. “We have enough evidence from the Ebola epidemic to suggest how progress on malaria elimination could be derailed and we are seeing some clear warnings now,” APLMA/APMEN commented. Historically, malaria cases have risen in countries where healthcare is interrupted due to conflict, disaster and war.

Peace Corps faces questions over death of volunteer from Inverness

By Sheryl Gay Stolberg of the New York Times reported that the Peace Corps, which suspended all operations for the first time in its history as the novel coronavirus raced around the globe, is facing renewed questions about the quality of its medical care — in particular, after the death of a 24-year-old volunteer from undiagnosed malaria — as it prepares to send volunteers back into the field.

An investigation by the Peace Corps inspector general documented a string of problems with Heiderman’s care. Her doctor had “limited training in tropical medicine,” the investigation found, and failed to test for malaria, which would have revealed that Heiderman had been infected by the deadliest malaria parasite. The Peace Corps was also using outdated 2006 guidelines for malaria, which did not reflect the current standard of care.

Anopheline and human drivers of malaria risk in northern coastal Ecuador

Understanding local anopheline vector species and their bionomic traits, as well as related human factors, can help combat gaps in protection. In San José de Chamanga, Esmeraldas, at the Ecuadorian Pacific coast, anopheline mosquitoes were sampled by both human landing collections (HLCs) and indoor-resting aspirations (IAs) and identified using both morphological and molecular methods.

Among 222 anopheline specimens captured, based on molecular analysis. The exophagic feeding of anopheline vectors in San Jose de Chamanga, when analysed in conjunction with human behaviour, indicates a clear gap in protection even with high LLIN coverage. The lack of indoor-resting anophelines suggests that indoor residual spraying (IRS) may have limited effect. The presence of asymptomatic infections implies the presence of a human reservoir that may maintain transmission.

How useful are malaria risk maps at the country level?

This study examined the perceptions of decision-makers in Kenya, Malawi and the Democratic Republic of Congo. Declining malaria prevalence and pressure on external funding have increased the need for efficiency in malaria control in sub-Saharan Africa (SSA). Modelled Plasmodium falciparum parasite rate (PfPR) maps are increasingly becoming available and provide information on the epidemiological situation of countries. However, how these maps are understood or used for national malaria planning is rarely explored. In this study, the practices and perceptions of national decision-makers on the utility of malaria risk maps, showing prevalence of parasitaemia or incidence of illness, was investigated.

Three different types of maps were used to show malaria epidemiological strata: malaria prevalence using a PfPR modelled map (Kenya); malaria incidence using routine health system data (Malawi); and malaria prevalence using data from the most recent Demographic and Health Survey (DRC). In Kenya the map was used to target preventative interventions, including long-lasting insecticide-treated nets (LLINs) and intermittent preventive treatment in pregnancy (IPTp), whilst in Malawi and DRC the maps were used to target in-door residual spraying (IRS) and LLINs distributions in schools. Maps were also used for operational planning, supply quantification, financial justification and advocacy. Findings from the interviews suggested that decision-makers lacked trust in the modelled PfPR maps when based on only a few empirical data points (Malawi and DRC). Despite the availability of national level modelled PfPR maps in all three countries, they were only used in one country.

Infection of highly insecticide-resistant malaria vector Anopheles coluzzii with entomopathogenic bacteria

This study found that Chromobacterium violaceum reduces its survival, blood feeding propensity and fecundity of mosquitoes in Burkina Faso. The study was motivated by the concern that malaria eradication will not be achieved without the introduction of novel control tools. Microbiological control might be able to make a greater contribution to vector control in the future. The interactions between bacteria and mosquito make mosquito microbiota really promising from a disease control perspective.
Methods

To assess entomopathogenic effects of C. violaceum infection on mosquitoes, three different types of bioassays were performed in laboratory. These bioassays aimed to evaluate the impact of C. violaceum infection on mosquito survival, blood feeding and fecundity, respectively. During bioassays mosquitoes were infected through the well-established system of cotton ball soaked with 6% glucose containing C. violaceum.

The data showed important properties of Burkina Faso C. violaceum strains, which are highly virulent against insecticide-resistant An. coluzzii, and reduce both mosquito blood feeding and fecundity propensities. However, additional studies as the sequencing of C. violaceum genome and the potential toxins secreted will provide useful information render it a potential candidate for the biological control strategies of malaria and other disease vectors.

Recent news and abstracts include mosquito control using solar disruption of of larval habitats and plants that repel the insects around homes. The challenges of malaria related anemia in pregnancy is discussed. Malaria cases increase in Mali and Mozambique, but in the latter, deaths actually decrease. Malaria parasites have ways of making people more attractive to mosquito bites. Finally covid-19 has not disrupted malaria work as much as anticipated. Read more at the links in the sections below.

Improved Mosquito Control with Solar Power Machine that Causes Ripple Effect

Kristina Panos writes that mosquito haters of the world, rejoice! A few years ago we told you about the first version of this solar-powered mosquito repellent that works by disturbing the surface of standing water. Since then, the project has received worldwide attention, and [Pranav] is back with Solar Scare Mosquito version 2.0 in time for the the 2020 Hackaday Prize.

The idea’s still the same as before: let mosquitoes lay their eggs in the standing waters of tanks and swamps, then disturb the water with vibrations so the larvae on the surface can’t breathe. As smart as this simple idea is, version 2.0 is even smarter. It has a microphone that listens to the wing-beat frequencies of mosquitoes that like to hang around places like that. Inside there’s an Arduino MKR GSM to run the ripple-generating air pump, detect water from the sensor, and gather data from the microphone.

With a network of these devices all reporting data, [Pranav] envisions an early warning system for mosquito-borne epidemics that works by alerting the locals through their phones. Solar Scare Mosquito has come a long way since 2014.

Malaria cases spike in northern Mali

Malaria cases in northern Mali have spiked, according to medical workers, claiming 23 lives in the often lawless desert region last week alone. Mali’s ministry of health said this week that 59 people have died of malaria in the north since the start of the year, almost double the number of deaths over the same period last year.

Already struggling to curb coronavirus, the poor Sahel country is also fighting a brutal jihadist insurgency active in the north and centre of the country.

A powerful attractant: Malaria parasites lure blood-sucking mosquitoes

The malaria parasite’s gametocyte-stage has been demonstrated in the field to heavily manipulate the blood-seeking behaviour of vector mosquitoes through increasing the appeal of biting an infected host.

Plasmodium parasites, the causative agents of Malaria in humans and animals, are well known for manipulating both their human and mosquito hosts as a way of maximising the probability of interactions between them, thereby increasing the chance malaria parasites are transmitted from host to host. One way in which these devious parasites have been shown to increase the probability of host interaction is during their transmissible (gametocyte) stage.

This is achieved by inducing host red blood cells to produce volatile compounds that attract malarial vector species, such as mosquitos in the Anopheles family. The increase in production of volatile compounds, such as certain aldehydes and terpenes, by host red blood cells was shown back in 2017 to be specifically induced by a gametocyte-produced molecule called (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate, also known as HMBPP.

Malaria campaigns fight off Covid disruptions to deliver programmes

Almost all planned work against the disease has gone ahead this year, delivering nets, drugs and the world’s first malaria vaccine. More than 90% of anti-malaria campaigns planned this year across four continents are on track, despite disruptions caused by the coronavirus pandemic, according to new research.

The delivery of insecticide-treated nets and provision of antimalarial medicines in the majority of malaria-affected countries across Africa, Asia and the Americas were still going ahead, a high-level meeting organised by the RBM Partnership to End Malaria heard on Thursday.

Malaria associated with increased prevalence of anemia during pregnancy

Ken Downey Jr. and colleagues conducted a study in seven sub-Saharan African countries demonstrated an association between malaria and an increased prevalence of anemia among pregnant women, according to findings published in BMC Pregnancy and Childbirth.

“Pregnant women in sub-Saharan Africa suffer a double burden of malaria and HIV infections, and these infections interact with each other to cause anemia,” Ssentongo told Healio. “If not treated, the risk of the mother and the unborn baby dying is high. Multipronged strategies to prevent and treat malaria in HIV pregnant women are critical to ensure the survival of the mothers and their unborn babies.”Paddy Ssentongo, MD, MPH, a research assistant professor at Penn State University,

Mozambique: Malaria Cases Increase, Malaria Death Toll Declines

From January to August, 442 people in Mozambique are known to have died from malaria, according to Health Minister Armindo Tiago. Speaking at the launch of a National Home Spraying Campaign, Tiago said the malaria death toll, in the first eight months of the year, was significantly lower than that recorded in the same period in 2019, when 562 people died of the disease.

But although fewer people are dying of malaria, the number of malaria cases has actually increased – from 7.86 million cases in January-August 2019 to 8.36 million in the same months this year. The number of cases rose by 6.4 per cent, but the number of deaths fell by 21.4 per cent. Thus there is the drive to persuade families to change their behaviour.

The Plants That Keep Mosquitoes Away

Protect outdoor areas from mosquitoes and bugs to enjoy evenings outside. Including the following plants in a home garden can provide homeowners with some important weapons in the war against mosquitoes.

1. Citronella Plants: You may already be familiar with citronella plants, as they are known for emitting a strong smell that mosquitoes find objectionable. This group of plants contain citronellal, the active ingredient commonly found in mosquito repellents like citronella patio candles or sprays.

2. The Mint Family: Some members of the mint family have the power to repel mosquitoes, or at least take the sting out of their bites. Check Lemon Balm, Peppermint, Basil, Lavender, Sage, and Catnip.

3. Flowers: Believe it or not, ornamental plants can actually do double duty and function as mosquito repellents. Even better, these plants love sun and are drought resistant. Marigolds, and their relative, tarragoncontain pyrethrum, an ingredient found in many insect repellents. Verbena is a lemon-scented, easy-to-grow perennial. Citrosum is also named “the mosquito plant,” and is one of the best plants in the game for repelling mosquitoes.

Today’s stories cover three continents including Surveillance for imported malaria in Sri Lanka, community perceptions in Colombia and Annual Fluctuations in Malaria Transmission Intensity in 5 sub-Saharan countries. In addition there is an overview of microscopy standards and an Integrated Macroeconomic Epidemiological Demographic Model to aid in planning malaria elimination. We also see how COVID-19 is disturbing Seasonal Malaria Chemoprevention activities in Burkina Faso. Read more by following the links in the sections below.

Will More of the Same Achieve Malaria Elimination?

… Results from an Integrated Macroeconomic Epidemiological Demographic Model. Historic levels of funding have reduced the global burden of malaria in recent years. Questions remain, however, as to whether scaling up interventions, in parallel with economic growth, has made malaria elimination more likely today than previously. The consequences of “trying but failing” to eliminate malaria are also uncertain. Reduced malaria exposure decreases the acquisition of semi-immunity during childhood, a necessary phase of the immunological transition that occurs on the pathway to malaria elimination. During this transitional period, the risk of malaria resurgence increases as proportionately more individuals across all age-groups are less able to manage infections by immune response alone. We developed a robust model that integrates the effects of malaria transmission, demography, and macroeconomics in the context of Plasmodium falciparum malaria within a hyperendemic environment.

The authors analyzed the potential for existing interventions, alongside economic development, to achieve malaria elimination. Simulation results indicate that a 2% increase in future economic growth will increase the US$5.1 billion cumulative economic burden of malaria in Ghana to US$7.2 billion, although increasing regional insecticide-treated net coverage rates by 25% will lower malaria reproduction numbers by just 9%, reduce population-wide morbidity by ?0.1%, and reduce prevalence from 54% to 46% by 2034. As scaling up current malaria control tools, combined with economic growth, will be insufficient to interrupt malaria transmission in Ghana, high levels of malaria control should be maintained and investment in research and development should be increased to maintain the gains of the past decade and to minimize the risk of resurgence, as transmission drops. © The American Society of Tropical Medicine and Hygiene [open-access]

Microscopy standards to harmonise methods for malaria clinical research studies

Research Malaria Microscopy Standards (ReMMS) applicable to malaria clinical research studies have been published in Malaria Journal. The paper describes the rationale for proposed standards to prepare, stain and examine blood films for malaria parasites. The standards complement the methods manual(link is external) previously published by the World Health Organization and UNICEF/UNDP/World Bank/WHO Special Programme for Research and Training in Tropical Diseases (TDR). The standards aim to promote consistency and comparability of data from microscopy performed for malaria research and hence to strengthen evidence for improvements in malaria prevention, diagnostics and treatment.

Microscopy is important in both malaria diagnosis and research. It is used to differentiate between Plasmodium species and stages and to estimate parasite density in the blood – an important determinant of the severity of disease. It is also used to monitor the effectiveness of drugs based on the rate at which parasites recrudesce or are cleared from the blood.

While rapid diagnostic tests have replaced microscopy in some contexts, microscopy remains an essential tool to support clinical diagnosis and research. The standardisation of methods allows direct comparisons from studies conducted across different points in time and location. This facilitates individual participant data meta-analyses, recognised as the gold standard approach to generate evidence for improvements in interventions and hence patient outcomes.

Estimating Annual Fluctuations in Malaria Transmission Intensity and in the Use of Malaria Control Interventions in Five Sub-Saharan African Countries

RTS,S/AS01E malaria vaccine safety, effectiveness, and impact will be assessed in pre- and post-vaccine introduction studies, comparing the occurrence of malaria cases and adverse events in vaccinated versus unvaccinated children. Because those comparisons may be confounded by potential year-to-year fluctuations in malaria transmission intensity and malaria control intervention usage, the latter should be carefully monitored to adequately adjust the analyses. This observational cross-sectional study is assessing Plasmodium falciparum parasite prevalence (PfPR) and malaria control intervention usage over nine annual surveys performed at peak parasite transmission. Plasmodium falciparum parasite prevalence was measured by microscopy and nucleic acid amplification test (quantitative PCR) in parallel in all participants, and defined as the proportion of infected participants among participants tested. Results of surveys 1 (S1) and 2 (S2), conducted in five sub-Saharan African countries, including some participating in the Malaria Vaccine Implementation Programme (MVIP), are reported herein; 4,208 and 4,199 children were, respectively, included in the analyses.

Plasmodium falciparum parasite prevalence estimated using microscopy varied between study sites in both surveys, with the lowest prevalence in Senegalese sites and the highest in Burkina Faso. In sites located in the MVIP areas (Kintampo and Kombewa), PfPR in children aged 6 months to 4 years ranged from 24.8% to 27.3%, depending on the study site and the survey. Overall, 89.5% and 86.4% of children used a bednet in S1 and S2, of whom 68.7% and 77.9% used impregnated bednets. No major difference was observed between the two surveys in terms of PfPR or use of malaria control interventions. © The American Society of Tropical Medicine and Hygiene [open-access]

Community perception of malaria in a vulnerable municipality in the Colombian Pacific

Malaria primarily affects populations living in poor socioeconomic conditions, with limited access to basic services, deteriorating environmental conditions, and barriers to accessing health services. Control programmes are designed without participation from the communities involved, ignoring local knowledge and sociopolitical and cultural dynamics surrounding their main health problems, which implies imposing decontextualized control measures that reduce coverage and the impact of interventions. The objective of this study was to determine the community perception of malaria in the municipality of Olaya Herrera in the Colombian Pacific.

A 41-question survey on knowledge, attitudes, and practices (KAP) related to malaria, the perception of actions by the Department of Health, and access to the health services network was conducted. In spite of the knowledge about malaria and the efforts of the Department of Health to prevent it, the community actions do not seem to be consistent with this knowledge, as the number of cases of malaria is still high in the area.

Use of a Plasmodium vivax genetic barcode for genomic surveillance and parasite tracking in Sri Lanka

Sri Lanka was certified as a malaria-free nation in 2016; however, imported malaria cases continue to be reported. Evidence-based information on the genetic structure/diversity of the parasite populations is useful to understand the population history, assess the trends in transmission patterns, as well as to predict threatening phenotypes that may be introduced and spread in parasite populations disrupting elimination programmes. This study used a previously developed Plasmodium vivax single nucleotide polymorphism (SNP) barcode to evaluate the population dynamics of P. vivax parasite isolates from Sri Lanka and to assess the ability of the SNP barcode for tracking the parasites to its origin.

A total of 51 P. vivax samples collected during 2005–2011, mainly from three provinces of the country, were genotyped for 40 previously identified P. vivax SNPs using a high-resolution melting (HRM), single-nucleotide barcode method. The proportion of multi-clone infections was significantly higher in isolates collected during an infection outbreak in year 2007. Plasmodium vivax parasite isolates collected during a disease outbreak in year 2007 were more genetically diverse compared to those collected from other years. In-silico analysis using the 40 SNP barcode is a useful tool to track the origin of an isolate of uncertain origin, especially to differentiate indigenous from imported cases. However, an extended barcode with more SNPs may be needed to distinguish highly clonal populations within the country.

Coronavirus rumours and regulations mar Burkina Faso’s malaria fight

By Sam Mednick, Thomson Reuters Foundation: MOAGA, Burkina Faso – Health worker Estelle Sanon would hold the 18-month-old and administer the SMC dose herself, but because of coronavirus she has to keep a distance from her patients. “If I am standing and watching the mother do it, it’s as if I’m not doing my work,” said Sanon, a community health volunteer assisting in a seasonal campaign to protect children in the West African country from the deadly mosquito-borne disease.

Burkina Faso is one of the 10 worst malaria-affected nations in the world, accounting for 3% of the estimated 405,000 malaria deaths globally in 2018, according to the World Health Organization (WHO). More than two-thirds of victims are children under five. Now there are fears malaria cases could rise in Burkina Faso as restrictions due to coronavirus slow down a mass treatment campaign and rumours over the virus causing parents to hide their children, according to health workers and aid officials.

“COVID-19 has the potential to worsen Burkina Faso’s malaria burden,” said Donald Brooks, head of the U.S. aid group Initiative: Eau, who has worked on several public health campaigns in the country.  “If preventative campaigns can’t be thoroughly carried out and if people are too scared to come to health centres … it could certainly increase the number of severe cases and the risk of poor outcomes.”

During peak malaria season, from July to November, community health workers deploy across Burkina Faso to treat children with seasonal malaria chemoprevention (SMC). This is the second year the campaign will cover the whole country with more than 50,000 volunteers going door-to-door, said Gauthier Tougri, coordinator for the country’s anti-malaria programme. Logistics were already challenging. Violence linked to jihadists and local militias has forced more than one million people to flee their homes, shuttered health clinics and made large swathes of land inaccessible. Now the coronavirus has made the task even harder, health workers said.

People in Cape Verde evolved better malaria resistance in 550 years

Yes, we are still evolving. And one of the strongest examples of recent evolution in people has been found on the Cape Verde islands in the Atlantic, where a gene variant conferring a form of malaria resistance has become more common.

Portuguese voyagers settled the uninhabited islands in 1462, bringing slaves from Africa with them. Most of the archipelago’s half a million inhabitants are descended from these peoples. Most people of West African origin have a variant in a gene called DARC that protects.

Deadly malaria and cholera outbreaks grow amongst refugees as COVID pandemic strains health systems.

Apart from the strain on health facilities during the pandemic, in some countries such as Somalia, Kenya and Sierra Leone, we are seeing that a fear of exposure to COVID-19 has prevented parents from taking their children to hospital, delaying diagnosis and treatment of malaria and increasing preventable deaths. COVID restrictions in some countries have also meant pregnant women have missed antimalarial drugs. Untreated malaria in pregnant women can increase the risk of anaemia, premature births, low birth weight and infant death. According to the World Health Organization (WHO), 80% of programs designed to fight HIV, tuberculosis and malaria have been disrupted due to the pandemic and 46% of 68 countries report experiencing disruptions in the treatment and diagnosis of malaria.