You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following is a causative agent of Visceral Leishmaniasis? and explain in detail?
Visceral Leishmaniasis (kala-azar in Hindi) is caused by the L. donovani complex, which includes L. donovani (anthroponotic transmission) and L. infantum or L. chagasi (zoonotic transmission). Prevalence: India and neighboring Nepal, Bangladesh, Sudan, and Brazil are the four largest foci of VL and account for 90% of the world's VL burden, with India the worst affected. Ref: Sundar S. (2012). Chapter 212. Leishmaniasis. In D.L. Longo, A.S. Fauci, D.L. Kasper, S.L. Hauser, J.L. Jameson, J. Loscalzo (Eds), Harrison's Principles of Internal Medicine, 18e.