Plasmodium species are causative agents of which disease?

• A. Malaria
• B. Giardiasis
• C. Trichomoniasis
• D. Schistosomiasis

Answer: (A)

Plasmodium species are protozoan parasites transmitted by Anopheles mosquitoes that cause malaria. The parasite multiplies first in the liver and then within red blood cells, leading to the cyclical fevers, chills, anemia, and other symptoms characteristic of malaria. Different Plasmodium species (such as falciparum and vivax) can cause malaria, with varying severity. Other diseases listed are caused by different organisms: giardiasis arises from Giardia lamblia, trichomoniasis from Trichomonas vaginalis, and schistosomiasis from Schistosoma worms, not Plasmodium.