Effect of textile colour on vector mosquito host selection: a simulated field study in Mali, West Africa

Author:

Benz Ursula1,Traore Mohamad M2,Revay Edita E2,Traore Amadou S2,Prozorov Alexey M2,Traoré Issa2,Junnila Amy2,Cui Liwang34,Saldaitis Aidas5,Kone Aboubakr S2,Yakovlev Roman V6,Ziguime Younoussa2,Gergely Petrányi2,Samake Siriman2,Keita Alou2,Müller Günter C2,Weitzel Thomas78ORCID,Rothe Camilla1

Affiliation:

1. Division of Infectious Diseases and Tropical Medicine, LMU University Hospital , Munich , Germany

2. Faculty of Medicine and Odonto-Stomatology, University of Sciences, Techniques and Technology of Bamako , Bamako , Mali

3. Division of Infectious Diseases and International Medicine , Department of Internal Medicine, , Tampa, FL , USA

4. Morsani College of Medicine, University of South Florida , Department of Internal Medicine, , Tampa, FL , USA

5. Department of Entomology, State Nature Research Centre, Institute of Ecology , Vilnius , Lithuania

6. Department of Ecology, Altai State University , Barnaul , Russian Federation

7. Travel Medicine Program, Clínica Alemana, Facultad de Medicina Clínica Alemana, Universidad del Desarrollo , Santiago , Chile

8. Instituto de Ciencias e Innovación en Medicina (ICIM), Facultad de Medicina Clínica Alemana, Universidad del Desarrollo , Santiago , Chile

Abstract

Abstract Background The effect of clothing colour on the biting rates of different vector mosquito species is not well understood. Studies under tropical field conditions are lacking. This study aimed to determine the influence of clothing colours on mosquito biting rates in rural and suburban settings in West Africa. Methods We performed a simulated field study in a suburban and a rural site in Mali using Mosquito-Magnet traps utilizing CO2 and other attractants, which were covered with black, white, and black/white striped textile sheets covers. These targets operated continuously for 10 consecutive days with bright nights (around full moon) and 10 consecutive days with dark nights (around new moon). Trapped mosquitoes were collected and catch rates counted hourly. Mosquitoes were morphologically identified to the species complex level (Anopheles gambiae s.l. and Culex pipiens s.l.) or species level (Aedes aegypti). A subset of Anopheles specimens were further identified by molecular methods. Results Under bright-night conditions, An. gambiae s.l. was significantly more attracted to black targets than to white and striped targets; during dark nights, no target preference was noted. During bright nights, Cx. pipiens s.l. was significantly more attracted to black and striped targets than to white targets; a similar trend was noted during dark nights (not significant). For day-active Ae. aegypti, striped targets were more attractive than the other targets and black were more attractive than white targets. Conclusions The study firstly demonstrated that under field conditions in Mali, West Africa, mosquito catch rates were influenced by different clothing colours, depending on mosquito species and light conditions. Overall, light colours were least attractive to host-seeking mosquitoes. Using white or other light-coloured clothing can potentially reduce bite exposure and risk of disease transmission in endemic tropical regions.

Funder

University of Sciences, Techniques and Technology of Bamako

Publisher

Oxford University Press (OUP)

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1. Empfehlungen zur Malariaprophylaxe;Flugmedizin · Tropenmedizin · Reisemedizin - FTR;2024-08

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