Female Anopheles Mosquito Transmits Malaria
The correct answer is A - Female Anopheles mosquito. This is the only mosquito species capable of transmitting malaria parasites to humans 1.
Why Female Anopheles Specifically
All malaria species (Plasmodium falciparum, P. vivax, P. ovale, and P. malariae) are transmitted exclusively by the bite of an infective female Anopheles mosquito 1. The female mosquito requires blood meals for egg development, which is when transmission occurs. Male Anopheles mosquitoes do not bite humans and therefore cannot transmit malaria 2.
Why Not the Other Options
- Aedes aegypti (Option B): Transmits dengue, yellow fever, Zika, and chikungunya - not malaria
- Culex pipiens (Option C): Transmits West Nile virus and other arboviruses - not malaria
- Aedes albopictus (Option D): Transmits dengue and chikungunya - not malaria
Context for This Sudanese Patient
In Sudan specifically, Anopheles arabiensis is the predominant malaria vector, with research showing it accounts for 96% of blood-fed Anopheles mosquitoes collected in the field 3. This species demonstrates opportunistic feeding behavior on both humans and cattle, with a malaria positivity rate of 16.7% for any Plasmodium species 3.
The patient's presentation with fever and jaundice is consistent with malaria, particularly given Sudan's status as a malaria-endemic region in sub-Saharan Africa 4. Both P. falciparum and P. vivax are prevalent in Sudan 3.
Key Clinical Point
The Anopheles genus includes approximately 465 recognized species, but only about 70 can transmit Plasmodium to humans, with 41 considered dominant vectors 5. However, all human malaria transmission requires female Anopheles mosquitoes - this is an absolute requirement for the malaria transmission cycle 2.