Question

Which of the following is a causative agent of the disease kala-azar?

• A. Leishmania
• B. The disease is genetic in origin
• C. Salmonella typhi
• D. Wuchereria bancroftii

Answer 1

The correct option is A Leishmania

Leishmaniasis or kala-azar is a common disease caused by Leishmania donovani. The disease is transmitted by Phlebotomus argentipes. This is one of the sand flies species involved in the spreading of this disease. These act as the intermediate hosts and vectors which transmit the disease. The fly needs blood for the eggs to develop. They get infected when they suck blood from the infected person. The protozoan develops in the body of the fly and gets transmitted when the fly feeds on the blood of a healthy person.

Thus, the correct answer is option A.