Disease Vectors and Pathogens

Sleeping sickness (African trypanosomiasis) is transmitted by the tsetse fly, not by mosquitoes. Dengue, filariasis, and malaria are all well-known mosquito-borne diseases caused by different pathogens.

Trypanosoma brucei is the protozoan parasite that causes African sleeping sickness (African trypanosomiasis), transmitted by tsetse flies. The other options are incorrect: Fonsecaea causes chromoblastomycosis, Clostridium difficile causes antibiotic-associated diarrhea, and Ehrlichia causes ehrlichiosis.

Plasmodium genus (specifically P. falciparum, P. vivax, P. ovale, P. malariae, and P. knowlesi) is the definitive causative agent of malaria, transmitted by Anopheles mosquitoes. The other options are incorrect: Taenia causes tapeworm infection, Clonorchis causes liver fluke infection, and Histoplasma is a fungal pathogen.

Yellow fever is transmitted by the Aedes aegypti mosquito, making option A correct. The Anopheles mosquito (option B) is primarily responsible for transmitting malaria, not yellow fever. Culex mosquitoes (option D) transmit diseases like West Nile virus and Japanese encephalitis, while house flies (option C) are not vectors for yellow fever.

The tsetse fly is the vector for African trypanosomiasis (sleeping sickness), transmitting the parasite through its bite. This disease affects humans and animals in sub-Saharan Africa, causing neurological symptoms and can be fatal if untreated.

Malaria, caused by Plasmodium parasites transmitted by mosquitoes, primarily affects the spleen. The parasite infects and multiplies within red blood cells, causing their destruction and leading to splenomegaly (enlarged spleen) as the organ works to filter damaged cells.

Project Kavach was an Indian government initiative focused on HIV/AIDS prevention and control. It aimed to provide comprehensive care, support, and treatment to people living with HIV/AIDS. The name 'Kavach' means armor or shield, symbolizing protection against the disease. Malaria, Polio, and Cancer have separate dedicated health programs in India.

Quinine is a traditional medication extracted from cinchona tree bark, used for centuries to treat malaria by killing the Plasmodium parasite in red blood cells. It is not effective against typhoid, acne (pimples), or AIDS.

Resident viruses load into memory and remain active, infecting files as they're accessed. Fast infectors infect many files rapidly (even those not being executed), while slow infectors are more selective to avoid detection. Vectors are transmission mechanisms, not virus types. Chernobyl and CIH are specific virus names, not categories.

Malaria primarily affects the spleen as it filters out malaria-infected red blood cells, causing the spleen to enlarge (splenomegaly). The Plasmodium parasite infects and destroys red blood cells, which are then trapped by the spleen. Malaria does not directly target the heart, lungs, or kidneys as its primary organ.

Malaria primarily affects red blood cells, but the spleen becomes enlarged (splenomegaly) as it works to filter and destroy the infected RBCs. The malaria parasite (Plasmodium) replicates in red blood cells, causing their destruction.

Marsh fever is an archaic term for malaria, so named because the disease was commonly associated with marshy, swampy areas where mosquitoes breed abundantly. The term reflects historical understanding of malaria's transmission patterns before the mosquito vector was fully understood.

Malaria primarily affects the liver and red blood cells. The Plasmodium parasite first develops in the liver, then infects red blood cells causing them to rupture. The spleen becomes enlarged as it works to filter out the damaged, infected red blood cells. While the parasite circulates in blood, the liver and spleen are the primary organs that sustain damage.

Malaria is caused by Plasmodium parasites that infect and destroy red blood cells. The spleen works overtime to filter these damaged cells, often becoming enlarged (splenomegaly), making the spleen the organ most significantly affected by malaria.