Pneumocystis carinii

The prototype species of PNEUMOCYSTIS infecting the laboratory rat. It was formerly called Pneumocystis carinii f. sp. carinii. Strains that infect humans and cause PNEUMOCYSTIS PNEUMONIA were originally classified as Pneumocystis jirovecii or Pneumocystis carinii f. sp. hominis.

Pneumocystis carinii