Microbiology Pneumocystis carinii is a fungus because A rRNA, mitochondrial protein gene sequence and presence of thymidylate synthase B Cell wall contains glucans C Angifungals are effective against P. Carini D Commonest infection in AIDS 💡 Explanation Pneumocystis carinii is a fungus because ✓ Correct Answer: A. rRNA, mitochondrial protein gene sequence and presence of thymidylate synthase