Citation :

Nazaire Aïzoun, Géorcelin Alowanou, Habib Tamègnon, Alda Yémadjè, Daniel Chougourou, "Importance of Rabbit’s Blood Meal in the Assessment of Factors which Influence Vector Susceptibility to Insecticides," International Journal of Veterinary Science, vol. 12, no. 2, pp. 1-8, 2026. Crossref, https://doi.org/10.14445/24550868/IJVS-V12I2P101

Abstract

The understanding of the factors that influence vector susceptibility to insecticides is important. The current study aimed at investigating the importance of rabbit’s blood meal in the assessment of factors that influence vector susceptibility to Lambda-Cyhalothrin (Karate, as a commercial product name). Surveys were organized in the Couffo department, and larvae and pupae of Aedes aegypti mosquito populations were collected in the breeding sites from April to July 2025 during the great rainy season. The WHO susceptibility tests were conducted on unfed male and female mosquitoes aged 2-5 days old, and also conducted on unfed, blood-fed, and gravid female mosquitoes aged 2-5 days old. These susceptibility tests were also conducted on unfed, blood-fed, and gravid female mosquitoes aged 20 days old. The effects of synergist Piperonyl Butoxide (PBO) on lambda-cyhalothrin tolerance in Aedes aegypti larvae were also investigated. The results showed that Aedes aegypti females were more susceptible than the males. After females had taken their blood meals, vector susceptibility to Lambda-Cyhalothrin did not increase. Similarly, after females possess eggs in their abdomen, the results also showed that the old mosquitoes were more susceptible to Lambda-Cyhalothrin. Mono-Oxygenase enzymes may play a role in Aedes aegypti larvae tolerance to lambda-cyhalothrin in Djakotomey district. Many factors influence vector susceptibility to insecticides. The rabbit’s blood meal is important in the assessment of factors which influence vector susceptibility to insecticides. The method which exposes human hands to mosquitoes in a cage to be fed is not recommended.

Keywords

Benin, Dengue, Lambda-Cyhalothrin, Rabbit’s Blood Meal, Susceptibility to Insecticides.

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