Introduced Mosquito Increases Malaria Risk in Seven African Countries

A type of mosquito called “Steve” (scientifically Anopheles stephensi), which is usually found in southeast Asia has been introduced in Africa and is responsible for an increase in human malaria in seven countries, specifically Djibuti, Ethiopia, Sudan, Somalia, Kenya, Nigeria, and Ghana. This mosquito is a very effective transmitter of malaria since it replicates in urban environments under dry conditions, bites during daytime hours and is resistant to commonly used pesticides.

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The presence of the “Steve” mosquito in countries where malaria occurs raises the risk of exposure to malaria. All travellers to any region where malaria transmission is occurring can reduce their risk of exposure by taking all necessary precautions to avoid mosquito bites, e.g., use mosquito repellent and sleep under insecticide-impregnated bed nets whenever mosquitoes are present. Anti-malaria medication is recommended. Talk to your doctor about which malaria medication you should take.