O'nyong-nyong Virus

Orientia tsutsugamushi

Oxalobacter formigenes

Parechovirus

Pasteurella multocida

Pichia kudriavzevii

Plasmodium falciparum

Plasmodium knowlesi

Plasmodium malariae

Plasmodium ovale

Plasmodium vivax

Pneumocystis jirovecii