The accuracy of late antenatal screening cultures in predicting genital group B streptococcal colonization at delivery

Abstract

Anogenital cultures in broth media obtained during the late antenatal period are accurate in predicting group B streptococcal colonization status at delivery in term parturients, and they perform significantly (P < .01) better than cultures collected 6 or more weeks before delivery.

Comparison of pre- and intrapartum screening of group B streptococci and adherence to screening guidelines: a cohort study

“…PPV and NPV were reported to be 50.5 and 91.7 %, respectively [15]. Our results, together with those from Lin et al [15], are within the expected range of 43-100 % (mean 69 %) for PPV and 80-100 % (mean 94 %) for NPV [23,27].…”

Vaginal-rectal colonization with group A streptococci in late pregnancy

“…The colonization rate for GBS in this study, 20.1%, is well within the rates of 18-26% reported by other investigators. [5][6][7] Perinatally acquired infection from GAS has been described infrequently, 8 a fact that is not surprising given the low colonization rate described here. Most infectious disease authorities view GAS as a greater threat than GBS for the initiation of infection, and, as noted above, question whether it ever can be considered as "normal flora."…”

Prévention des infections bactériennes néonatales précoces à streptocoque B

“…Ces résultats sont retrouvés dans d'autres études [9,10,23]. Des études ont montré que la sensibilité, la spécificité, la VPP et VPN du test diminuent avec l'augmentation du délai entre le PV et l'accouchement surtout au-delà de cinq semaines avec une VPN qui passe de 96 % à 81 % et une sensibilité qui passe de 87 % à 43 % [14,24]. D'où les perspectives d'avenir d'un dépistage du portage vaginal de SB en salle de naissance par PCR en moins d'une heure.…”