Beta haemolytic streptococcal carriers among normal schoolchildren.
D002353:Carrier State / Q000453:epidemiology*; D002648:Child; D004812:Epidemiologic Methods; D005006:Ethnicity; D005260:Female; D006801:Humans; D008296:Malaysia; D008297:Male; D009302:Nasopharyngeal Diseases / Q000453:epidemiology / Q000382:microbiology; D009305:Nasopharynx / Q000382:microbiology; D012213:Rheumatic Fever / Q000453:epidemiology; D012959:Socioeconomic Factors; D013290:Streptococcal Infections / Q000453:epidemiology*; D013291:Streptococcus / Q000302:isolation & purification