title: Occurrence of Diplococcus pneumoniae in the upper respiratory tract of children.
abstract: The patterns of colonization of D. pneumoniae were studied over a 46-month period in a group of young children in a day-care center. Forty-four percent of nasal cultures yielded D. pneumoniae. The most frequently isolated serotypes--6, 19, and 23--accounted for 49% of the isolates; the nine most common serotypes included 80% of the isolates. Individual serotypes frequently were carried for several months. Reacquisition of a serotype previously carried occurred frequently. There was limited spread of serotypes among the children despite prolonged contact.
mesh_terms: D000367:Age Factors; D044383:Black People; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009297:Nasal Mucosa / Q000382:microbiology*; D012703:Serotyping; D012737:Sex Factors; D013296:Streptococcus pneumoniae / Q000302:isolation & purification*; D013997:Time Factors; D044465:White People