Definitions:

1. A disease caused by a protozoan parasite that causes the skin to darken in chronic conditions. NOUN
   • Kala-azar is a serious disease that can be fatal if not treated promptly.
2. An infectious disease that occurs in subtropical or tropical areas caused by a protozoan parasite, Leishmania donovani, transmitted by sand flies. NOUN
   • Kala-azar is transmitted by the bite of an infected sandfly.

Synonyms:

• black fever
• black sickness
• dumdum fever
• indian leishmaniasis
• visceral leishmaniasis