Which organism cannot be cultured ?
Klebsiella rhinoscleromatis
Klebsiella ozaenae
Klebsiella granulomatis
Pneumocystis jiroveci
Ans. is 'd' i.e., Pneumocytstis jiroveci "The life cycle of pneumocystis probably involves sexual and asexual reproduction, although definitive proof awaits the development of a reliable culture system". - Harrison "Rhinosporidium seeberi has not been cultivated in media". - Ananthnarayan.