Question

The causal organism of Kala-azar is

• A. Plasmodium vivax
• B. Leishmania donovani
• C. Trypanosoma lewisi
• D. Wuchereria bancrofti

Answer 1

The correct option is B

Leishmania donovani

The correct option is C.

Explanation for the correct option:

1. Leishmaniasis or Kala-azar protozoa is caused by the parasitic Leishmania Donovani, which is spread by the bite of a sandfly.
2. It is a chronic and potentially fatal parasitic disease that affects intestinal organs such as the liver, spleen, bone marrow, and lymph nodes.
3. The main symptoms of kala-azar include fever, extensive weight loss, swelling of the spleen and liver, anemia, bleeding, deterioration, weakness, darkening of the skin, and swelling of the glands.

Explanation for the incorrect options:

Option A:

Plasmodium vivax is the second most common cause of malaria worldwide.

Option C:

Trypanosoma levisi is a trypanosomas of the sub-genus Herpetosoma, a parasite of rats transmitted by fleas.

Option D:

Wuchereria bancrofti is a filarial worm found in human lymph nodes that causes lymphatic filariasis .

Final answer: The causal organism of Kala-azar is Leishmania Donovani.