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  • Title: Toxigenic bacterial diarrhea: nursery outbreak involving multiple bacterial strains.
    Author: Guerrant RL, Dickens MD, Wenzel RP, Kapikian AZ.
    Journal: J Pediatr; 1976 Dec; 89(6):885-91. PubMed ID: 792408.
    Abstract:
    An outbreak of watery diarrhea occurred in 14 of 15 infants in a special care unit over a four-day period. Using the CHO cell assay for enterotoxin, we found that 11 of these patients had toxigenic bacteria in their stools. These bacteria comprised nine different serotypes of three species of organisms: Escherichia coli, Klebsiella, and Citrobacter. None of the three serotypes of E. coli were classic enteropathogenic serotypes. Rectal swab specimens from all 15 infants were examined for the presence of viruses by electron microscopic and cell culture techniques as well as by studies in suckling mice. None had parvovirus- or reovirus-like agents and two had adenoviruses. No other viral agents were detected. Of 38 bacterial strains isolated from ten control infants without diarrhea, three Klebsiella strains from two individuals were found to be toxigenic. Analysis of a total of 136 enteric isolates showed that toxigenicity as measured by the CHO assay was strongly associated with strains isolated during acute diarrheal illness when compared with strains isolated in convalescence (p less than 10(-5)) or with strains from control infants without diarrhea (p less than 10(-5)). This study raises the possibility of an outbreak of disease caused by a transmissible plasmid responsible for a cholera-like enterotoxin production in several enteric bacterial strains.
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