American Society for Microbiology, Journal of Clinical Microbiology, 2(46), p. 807-809, 2008
DOI: 10.1128/jcm.01963-07
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ABSTRACT The β-hemolysin of Streptococcus agalactiae is a major virulence factor; consequently, nonhemolytic strains rarely cause infections. We report on a case of neonatal sepsis caused by a strain displaying heterogeneous hemolysin expression. It was detected by the simultaneous isolation of hemolytic and nonhemolytic colonies from cultures of the infant's blood.