Studies of the frequency and significance of infections with Mycoplasma pneumoniae.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003168:Complement Fixation Tests; D006801:Humans; D008875:Middle Aged; D009174:Mycoplasma / Q000276:immunology / Q000302:isolation & purification*; D012141:Respiratory Tract Infections / Q000382:microbiology*; D013557:Switzerland