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Effects of Intrapartum Antibiotic Prophylaxis on Neonatal Acquisition of Group B Streptococci.

Toyofuku, Meiwa; Morozumi, Miyuki; Hida, Mariko; Satoh, Yoshitake; Sakata, Hiroshi; Shiro, Hiroyuki; Ubukata, Kimiko; Murata, Mitsuru; Iwata, Satoshi.
J Pediatr; 190: 169-173.e1, 2017 11.
Artigo em Inglês | MEDLINE | Nov 2017 | ID: mdl-29144242
Resumo: OBJECTIVES: To assess the incidence of colonization with group B streptococci (GBS) among neonates as influenced by maternal GBS carriage and intrapartum antibiotic prophylaxis (IAP). STUDY DESIGN: Between October 2014 and May 2015, nasopharyngeal and rectal swab samples were collected from 730 neonates at 1 week and 1 month after birth. GBS and capsular serotype were identified by real-time polymerase chain reaction and by culture. IAP at delivery was determined retrospectively from hospital records. RESULTS: Sixty-four neonates (8.8%) were GBS-positive by real-time polymerase chain reaction and culture. Among neonates born to mothers who were GBS carriers (n = 107), 94.4% (101/107) had maternal IAP; 19.6% nonetheless were GBS-positive, compared with 6.5% of neonates born to noncarrier mothers (P <.01). Among neonates born to mothers receiving IAP, more were positive only at 1 month of age than at both 1 week and 1 month. The frequency of GBS in neonates born to mothers receiving IAP was significantly lower than that in neonates born to mothers not receiving IAP (P <.05). Capsular serotypes V (25%) and III (23.4%) were common, followed by Ib (15.6%), Ia (14.1%), II (7.8%), IV (6.3%), nontypeable (4.7%), and VI and VIII (each 1.6%). CONCLUSIONS: Delayed colonization with GBS occurs in infants born to GBS carrier mothers receiving IAP. GBS should be considered in all infants at 1 month after birth with signs of infection.