group B streptococci


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group B strep·to·coc·ci

a leading cause of a form of neonatal sepsis that has a 10-20% mortality rate and leaves a large number of survivors with brain damage; also a leading cause of meningitis.

group B streptococci

Streptococci that, when grown on blood-agar, produce complete hemolysis around each colony, indicated by a yellowish zone. Included are S. pyogenes and S. agalactiae.These streptococci are a leading cause of early-onset neonatal infections and late-onset postpartal infections. In women, this is marked by urinary tract infection, chorioamnionitis, postpartum endometritis, bacteremia, and wound infections complicating cesarean section. Eradication of this organism during labor decreases the chances for neonatal sepsis. Performance of cervical-rectal screening cultures at 35 to 37 weeks’ gestation (and intrapartum treatment with penicillin if cultures are positive) prevents the development of neonatal sepsis.
Synonym: ß-hemolytic streptococci
See also: streptococcus
References in periodicals archive ?
Distribution of antimicrobial resistance and virulence-related genes among Brazilian group B streptococci recovered from bovine and human sources.
Multiplex PCR assay for rapid and accurate capsular typing of group B streptococci. J.
Pulsed-field gel electrophoresis of human group B streptococci isolated in Brazil.
Genetic relatedness between group B streptococci originating from bovine mastitis and a human group B streptococcus type V cluster displaying an identical pulsed-field gel electrophoresis pattern.
The objectives of the present study were to determine the magnitude and associated risks factors of genital tract colonization by Group B Streptococci during the last trimester of pregnancy in a periurban slum of Orangi town, Karachi.
Group B Streptococci are part of the normal flora of the gastrointestinal and genital tract.
The researchers said only IL-6 was significantly elevated in the participants who had group B streptococci colonization, compared with the participants of the study without group B streptococci.
Whether group B streptococci are also a cause of preterm premature rupture of membrane and preterm labour has been the subject of conflicting reports.
So, the present case control study was planned clinically to evaluate the role of group B streptococci in preterm labour and maternal outcome.
Group B streptococci: the new challenge in neonatal infections.
A "disappointingly" high proportion of clinical laboratories still do not use selective culturing media when testing specimens for group B streptococci, which means that misdiagnoses may occur, noted Dr.
None of the group B streptococci tested in this study showed resistance to penicillin G or to ampicillin or cephalothin.