Question

Kala-azar and 'oriented sore' are diseases spread by
1. Sand fly
2. Housefly
3. Dragon fly
4. Grasshopper

Answer 1

Correct Answer - Option 1 : Sand fly

Explanation:

• 'Kala-azar' and 'oriented sore' are diseases spread by the bite of the infected sand fly.
• Only the female sand flies serve as a vector for these diseases
• The female sand fly requires blood for the development of its egg, when they suck blood from an infected person or animal they get infected by these parasites.
• Over a period of between 4 and 25 days, the parasites develop in the sandfly. When the infectious female sandfly then feeds on a fresh source of blood, it inoculates the person or animal with the parasite, and the transmission cycle is completed.

Pathogen (parasite)	Disease	Vector/Carrier
Leishmania donovani	Kala-azar	Sand fly
Leishmania Tropica	Oriental sore	Sand fly

Vector/carrier	Disease
Housefly	shigellosis, typhoid fever
Dragon fly	generally do not carry any disease
Grasshopper	generally do not carry any disease