Cross-reactions of reagents from streptococcal grouping kits with Streptococcus porcinus.
Streptococcus porcinus is usually associated with swine. Because we have received several isolates from human sources that had cross-reacted with commercial group B streptococcal reagents, we examined several commercial kits to determine the extent of this cross-reaction. Fifteen reference and 15 clinical strains of S. porcinus were tested for cross-reactions with group B streptococcal reagents from 12 different commercial kits. Cross-reactions were detected with all group B reagents, but the number of cross-reactions varied with each kit. We recommend that manufacturers of reagents designed to identify group B streptococci by serologic methods test their reagents for cross-reactions with selected S. porcinus cultures or antigens.
Thompson
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Division of Bacterial and Mycotic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. TAT1@CIDDBD2.EM.CDC.GOV
Facklam
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R
D000818:Animals; D015373:Bacterial Typing Techniques; D003429:Cross Reactions; D006801:Humans; D012680:Sensitivity and Specificity; D013291:Streptococcus / Q000145:classification* / Q000302:isolation & purification; D013552:Swine