Question

Causative organism of Dum-dum fever in human beings is:

• A. Trypanosoma gambiense
• B. Ancylostoma duodenale
• C. Leishmania tropica
• D. Leishmania donovani

Hint:

{Kala-azar} affects the liver and spleen (visceral organs). Named "Dum-dum fever" after Dum Dum, near Kolkata, where it was frequently observed.

Answer 1

The Correct Option is D

Step 1: Identify the Disease:
"Dum-dum fever" is another name for **Kala-azar** or **Visceral Leishmaniasis**.
Step 2: Identify the Pathogen:
This disease is caused by the protozoan parasite **\Leishmania donovani**, which is transmitted by the sandfly (\Phlebotomus).
Step 3: Analyze Other Options:
(A) \Trypanosoma gambiense: Causes African Sleeping Sickness.
(B) \Ancylostoma duodenale: Hookworm (Helminth).
(C) \Leishmania tropica: Causes Cutaneous Leishmaniasis (Oriental sore/Delhi boil).
Step 4: Final Answer:
Option (D) is correct.