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. 1984 Apr;19(4):457–459. doi: 10.1128/jcm.19.4.457-459.1984

Rapid detection of group B streptococcal antigen by monoclonal antibody sandwich enzyme assay.

D L Morrow, J B Kline, S D Douglas, R A Polin
PMCID: PMC271094  PMID: 6371047

Abstract

Group B Streptococcus (GBS) is the most common cause of neonatal sepsis and meningitis. Infants at greatest risk to develop invasive disease are delivered to women colonized with GBS in their birth canals and lacking immunity to the colonizing serotype. We have investigated the sensitivity and specificity of a recently developed monoclonal antibody sandwich enzyme immunoassay for detection of GBS antigen. The sandwich enzyme immunoassay detected types II and III GBS at a concentration of 5 X 10(4) CFU/ml and types Ia and Ib GBS at 5 X 10(5) CFU/ml. No cross-reactions were noted when each of the GBS serotypes was reacted with antibodies of differing serotypes specificities. Type III GBS native antigen was detected at a concentration of 1 ng/ml. The sandwich enzyme assay is more sensitive than other methods currently in use for rapid detection of GBS and is serotype specific. This assay system should prove useful for the detection of GBS colonization during labor and for identification of neonates with invasive disease.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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