P - organism

- P aeruginosa - P falciparum - P knowlesi - P malariae - P mirabilis - P multocida - P shigelloides - P vivax - P. falciparum - Papilloma virus - papillomavirus - Paragonimus - parainfluenza virus - paramyxoviridae - Paramyxovirus - Pardosa - parvovirus B19 - Pasteurella multocida - Pasteurellaceae - peacock spider - Pediculus capitis - Pediculus humanus - Pentatrichomonas hominis (Trichomonis hominis) - Phoneutria - Phthirus pubis - picornaviridae - picornavirus - pinworm - Plasmodium - Plasmodium falciparum - Plasmodium knowlesi - Plasmodium malariae - Plasmodium ovale - Plasmodium vivax - Pleistophora - Plesiomonas shigelloides - polio virus - Poliovirus - Polyoma bk virus - Polyoma virus - polyomavirus - pork tapeworm - Porphyromonas - Porphyromonas gingivalis - Powassan virus - poxviridae - Poxvirus - Prevotella - Proteus - Proteus mirabilis - Provirus - Pseudomonas aeruginosa - Pseudomonas pseudomallei - pseudorabies virus - pubic louse - Pulex irritans