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  • Title: Epidemiology of Escherichia coli K1 in healthy and diseased newborns.
    Author: Sarff LD, McCracken GH, Schiffer MS, Glode MP, Robbins JB, Orskov I, Orskov F.
    Journal: Lancet; 1975 May 17; 1(7916):1099-104. PubMed ID: 49468.
    Abstract:
    Although at least 100 different Escherichia coli capsular antigens have been recognised, strains possessing the K1 antigen are responsible for 77% of neonatal E. coli meningitis cases. K1 strains were found in 20-40% of rectal swab cultures from healthy infants, children, and adult women. Vertical transmission from mother to infant was the most common means of aquiring K1 organisms in term infants. Premature babies in a nursery with little maternal contact aquired K1 strains later then did term infants, and this aquisition may have been related to carriage by nursery staff. Capsular content and fermentation reactions of cerebrospinal-fluid K1 organisms were comparable to those found in rectal strains from healthy individuals. E. coli K1 with identical O and H antigens were found in maternal and infantile cultures of babies with E. coli meningitis. It seems very likely that host immune mechanisms play a significant role in the pathogenesis of neonatal E. coli K1 meningitis.
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