Which tropical viral disease is transmitted by mosquitoes and affects the liver and kidneys, causing fever and jaundice?

• A. Dengue fever
• B. Yellow fever
• C. Hepatitis A
• D. Malaria

Answer: (B)

This question tests the ability to recognize a mosquito-borne viral illness that specifically involves the liver and kidneys and presents with fever and jaundice. Yellow fever is a flavivirus transmitted by Aedes mosquitoes. It commonly causes fever and systemic illness, and in many cases progresses to liver dysfunction, leading to jaundice, and can affect the kidneys as well. The standout feature here is the liver involvement with jaundice linked to yellow fever.

Dengue fever is also mosquito-borne but tends to present with severe body aches, headaches, and sometimes hemorrhagic features rather than prominent jaundice. Hepatitis A is a viral liver disease, but it is transmitted fecal-orally rather than by mosquitoes. Malaria is mosquito-borne too but is a parasite, not a virus, and while jaundice can occur, the primary issue is parasitemia and hemolysis rather than a viral hepatitis picture.