Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Kala-azar is a serious parasitic infection spread by the bite of infected sandflies. It affects the internal organs — spleen, liver and bone marrow — and is fatal if untreated, but curable with medicines. It occurs in parts of eastern India.
Specific anti-parasite medicines (free under India’s elimination programme)
Nutritional support and treatment of anaemia
Treating other infections that occur alongside it
Sandfly control and bed nets to prevent infection
Follow-up to check for cure and relapse
When to see a doctor urgently
Fever lasting more than two weeks with weight loss
A swollen abdomen or noticeable tiredness and paleness
Any of these after staying in an endemic area
Bleeding or repeated infections with a long fever
Not a diagnosis. MedDroid gives general educational information about kala-azar (visceral leishmaniasis). It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Is kala-azar curable?
Yes. With early diagnosis and the right medicines it is curable, and treatment is provided free under India’s elimination programme. Untreated, it can be fatal — so do not delay.
How does kala-azar spread?
Through the bite of an infected sandfly, not from person to person. Controlling sandflies and using bed nets helps prevent it.
Why is it called "black fever"?
The name kala-azar means black fever, referring to the darkening of the skin that can occur with the long-lasting fever of the disease.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.