Pneumocystis carinii.
D003168:Complement Fixation Tests; D003586:Cytomegalovirus Infections / Q000150:complications*; D056890:Eukaryota / Q000254:growth & development; D005455:Fluorescent Antibody Technique; D006801:Humans; D009975:Orthomyxoviridae / Q000302:isolation & purification; D009976:Orthomyxoviridae Infections / Q000150:complications*; D011020:Pneumonia, Pneumocystis / Q000150:complications