title: Opportunist lung infections.
mesh_terms: D004926:Escherichia coli / Q000302:isolation & purification; D006193:Haemophilus influenzae / Q000302:isolation & purification; D006801:Humans; D007165:Immunosuppression Therapy; D007223:Infant; D007709:Klebsiella / Q000302:isolation & purification; D011010:Pneumocystis / Q000302:isolation & purification; D011014:Pneumonia / Q000382:microbiology*; D011511:Proteus / Q000302:isolation & purification; D011550:Pseudomonas aeruginosa / Q000302:isolation & purification; D013296:Streptococcus pneumoniae / Q000302:isolation & purification