Following grows in the cell free medium except -: (A) Rickettsia, (B) M leprae, (C) Baonella, (D) Syphilis
Answer is A. Rickettsiae cannot be grown in cell-free culture media. They usually grow in the cytoplasm of infected cells. REF:Textbook ofMicrobiologyy, Anantha Narayan, and Paniker. Page no.: 406