Risk factors associated with house entry of malaria vectors in an area of Burkina Faso with high, persistent malaria transmission and high insecticide resistance

Yaro, Jean Baptiste, Tiono, Alfred B., Sanou, Antoine, Toé, Hyacinthe, Bradley, John, Ouedraogo, Alphonse, Ouedraogo, Z. Amidou, Guelbeogo, Moussa W., Agboraw, Efundem, Worrall, Eve ORCID: https://orcid.org/0000-0001-9147-3388, Sagnon, N.’Fale, Lindsay, Steven W. and Wilson, Anne ORCID: https://orcid.org/0000-0001-7387-353X (2021) 'Risk factors associated with house entry of malaria vectors in an area of Burkina Faso with high, persistent malaria transmission and high insecticide resistance'. Malaria Journal, Vol 20, Issue 397.

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Abstract

Background
In rural Burkina Faso, the primary malaria vector Anopheles gambiae sensu lato (s.l.) primarily feeds indoors at night. Identification of factors which influence mosquito house entry could lead to development of novel malaria vector control interventions. A study was therefore carried out to identify risk factors associated with house entry of An. gambiae s.l. in south-west Burkina Faso, an area of high insecticide resistance.

Methods
Mosquitoes were sampled monthly during the malaria transmission season using CDC light traps in 252 houses from 10 villages, each house sleeping at least one child aged five to 15 years old. Potential risk factors for house entry of An. gambiae s.l. were measured, including socio-economic status, caregiver’s education and occupation, number of people sleeping in the same part of the house as the child, use of anti-mosquito measures, house construction and fittings, proximity of anopheline aquatic habitats and presence of animals near the house. Mosquito counts were compared using a generalized linear mixed-effect model with negative binomial and log link function, adjusting for repeated collections.

Results
20,929 mosquitoes were caught, of which 16,270 (77.7%) were An. gambiae s.l. Of the 6691 An. gambiae s.l. identified to species, 4101 (61.3%) were An. gambiae sensu stricto and 2590 (38.7%) Anopheles coluzzii. Having a metal-roof on the child’s sleeping space (IRR = 0.55, 95% CI 0.32–0.95, p = 0.03) was associated with fewer malaria vectors inside the home.

Conclusion
This study demonstrated that the rate of An. gambiae s.l. was 45% lower in sleeping spaces with a metal roof, compared to those with thatch roofs. Improvements in house construction, including installation of metal roofs, should be considered in endemic areas of Africa to reduce the burden of malaria.

Item Type:	Article
Subjects:	QX Parasitology > QX 4 General works QX Parasitology > Insects. Other Parasites > QX 510 Mosquitoes WA Public Health > Health Problems of Special Population Groups > WA 395 Health in developing countries WA Public Health > Housing. Buildings. Public Facilities > WA 795 Housing WC Communicable Diseases > Tropical and Parasitic Diseases > WC 750 Malaria
Faculty: Department:	Biological Sciences > Vector Biology Department
Digital Object Identifer (DOI):	https://doi.org/10.1186/s12936-021-03926-5
Depositing User:	Samantha Sheldrake
Date Deposited:	18 Oct 2021 10:28
Last Modified:	18 Oct 2021 10:28
URI:	https://archive.lstmed.ac.uk/id/eprint/19200

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