Organisms that have not been cultured successfully so far is?
Pathogenic Treponemes do not grow in aificial culture media. They require a living organism like a virus for their growth REF: Textbook of microbiology Ananthanarayan, and Paniker. Page no.: 371
Leptospira
Treponema pallidum
Bordetella
Staphylococcus
general microbiology