The feasibility of achieving and sustaining “malaria-free zones” in southern Zambia

World Malaria Day 2014 was observed at the Johns Hopkins Bloomberg School of Public Health on Friday 25 April. 21 posters were presented. Below is the abstract of a poster presented William Moss and colleagues from the Southern Africa International Centers of Excellence for Malaria Research.

miam_handbook_articleimageThe Government of Zambia is committed to creating “malaria-free zones” in southern Zambia. Through passive case detection at health care facilities and active case detection through community-based surveys, we have documented a dramatic decline in the burden of malaria in the catchment area of Macha Hospital, Choma District, Southern Province, Zambia from 2008 through 2013.

Macha Hospital: https://www.flickr.com/photos/inmed/sets/72157625850417125/

Macha Hospital: https://www.flickr.com/photos/inmed/sets/72157625850417125/

However, residual foci of transmission exist and the potential for repeated importation remains. We identified individuals with subpatent parasitemia and gametocytemia who may be responsible for sustained, low-level transmission and evaluated reactive case detection strategies to identify and treat these individuals using simulation models.

Factors associated with sustained insecticide-treated bed net use were evaluated in light of the declining burden of malaria. Parasite bar coding of 24 SNPs should permit the identification of imported parasites.

Results of a longitudinal analysis of changes in antibody responses to 500 Plasmodium falciparum antigens using a protein microarray should allow detection of residual transmission and document loss of humoral immunity in the absence of exposure.

Leave a Reply

Your email address will not be published. Required fields are marked *