title: Diagnostic experience in two cases of legionellosis.
abstract: Sera of 30 patients with atypical pneumonia were tested for antibodies against the representative strains of Legionella pneumophila 1-6 serogroups and 4 species of legionella-like organisms. Investigations were carried out with indirect immunofluorescence assay. The sera of 2 patients gave a titre of 2048 and 1024 with serogroup 5 and 4, respectively. The high antilegionella IgM titres were indicative of recent infections. Legionellae were not detected in transtracheal aspirate and in autopsy material.
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000032:analysis*; D003937:Diagnosis, Differential; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis*; D007875:Legionella / Q000276:immunology* / Q000302:isolation & purification / Q000648:ultrastructure; D007877:Legionnaires' Disease / Q000175:diagnosis*; D008168:Lung / Q000382:microbiology; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009177:Mycoplasma pneumoniae / Q000276:immunology; D011014:Pneumonia / Q000209:etiology; D011019:Pneumonia, Mycoplasma / Q000175:diagnosis; D013183:Sputum / Q000382:microbiology
chemical_list: D000907:Antibodies, Bacterial; D007075:Immunoglobulin M