title: Pertussis--observations on some bacteriologically confirmed local cases.
mesh_terms: D001886:Bordetella pertussis / Q000302:isolation & purification; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D013188:Sri Lanka; D014917:Whooping Cough / Q000453:epidemiology / Q000382:microbiology*