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The Anopheles stephensi mosquito is an invasive malaria vector recently reported in Djibouti, Ethiopia, Sudan, Somalia, Nigeria, and Ghana. The World Health Organization has called on countries in Africa to increase surveillance efforts to detect and report this vector and institute appropriate and effective control mechanisms. In Kenya, the Division of National Malaria Program conducted entomological surveillance in counties at risk for An. stephensi mosquito invasion. In addition, the Kenya Medical Research Institute conducted molecular surveillance of all sampled Anopheles mosquitoes from other studies to identify An. stephensi mosquitoes. We report the detection and confirmation of An. stephensi mosquitoes in Marsabit and Turkana Counties by using endpoint PCR and morphological and sequence identification. We demonstrate the urgent need for intensified entomological surveillance in all areas at risk for An. stephensi mosquito invasion, to clarify its occurrence and distribution and develop tailored approaches to prevent further spread.

Original publication

DOI

10.3201/eid2912.230637

Type

Journal article

Journal

Emerg Infect Dis

Publication Date

12/2023

Volume

29

Pages

2498 - 2508

Keywords

Anopheles stephensi, Kenya, Marsabit, Turkana, malaria, molecular methods, mosquitoes, parasites, vector-borne infections, Animals, Anopheles, Kenya, Malaria, Mosquito Vectors, Biomedical Research