Evaluation of neonatal sepsis screening in a tropical area Part III: Neonatal sepsis in meconium stained deliveries

Of the 6,060 consecutive live births delivered at the University Maternity Unit of Guadeloupe (French West Indies) during a 30-month period, 635 newborns (10.4) presented with meconium stained (MS) amniotic fluid, of which 595 (94) received bacteriological screening at birth (light MS, n = 543; thick MS, n = 52). Thirty (5) of MS newborns had a bacteraemia (n = 13, group B streptococcus, GBS), and 128 (21.5) a bacterial positive gastric aspirate (n = 54, GBS). Sixty-six newborns among MS babies needed tracheal suctioning (11) in the delivery room for meconium inhalation. Among these 595 screened MS newborns, 286 (48) presented clinical signs of postmaturity at birth, having therefore an explanation for their MS condition. For the other MS newborns without the postmaturity explanation, we experienced twofold increased risk of neonatal sepsis (OR 1.88 for bacteraemia and 2.61 for external carriage p < 0.02, Chi square) as compared with their MS postmature counterparts. We conclude that when meconium stained deliveries are associated with postmaturity signs, one may not need to initiate prophylactic antibiotic treatment at birth unless they present with other traditional risk factors for neonatal sepsis such as intrapartum fever and prolonged rupture of membranes.

Evaluation of neonatal sepsis screening in a tropical area. Part II: Evaluation of intrapartum chemoprophylaxis protocol

The authors report on an analysis of a chemoprophylaxis protocol at the University Hospital of Guadeloupe in the Caribbean. This study comprised 6,060 consecutive deliveries and was initiated to assess the application of an intrapartum chemoprophylaxis protocol, evaluate its results, and try to identify possible necessary modifications to the existing protocol. Although more than 90 of women had at least one bacterial screening (vaginal or urinary) during the last trimester of pregnancy, approximately 75 of mothers who were heavily colonized group B streptococcus (GBS) at delivery were not detected by this systematic screening. As is also reported in other tropical areas where a great proportion of neonatal sepsis occurs in term babies, low birthweight was not a specific risk factor in this study when controlling for other major risk factors such as fever and premature rupture of membranes. Intrapartum chemoprophylaxis was associated with an approximate threefold decrease in the risk of GBS neonatal bacteraemia among at risk deliveries. The results suggest that, in our tropical context, prolonged rupture of membranes of at least 12 hours' duration should be considered as a cause for intrapartum chemoprophylaxis as it accounted for the majority of cases of neonatal bacteraemia that escaped the existing protocol.

Evaluation of neonatal sepsis screening in a tropical area. Part I: Major risk factors for bacterial carriage at birth in Guadeloupe

This prospective study reports on screening for neonatal sepsis among 3,372 live births out of 6,060 consecutive deliveries at the University Hospital of Pointe-Ó-Pitre, Guadeloupe, during a 30-month period. Group B Streptococcus (GBS) was the most common pathogen, representing 46 (89/194) of positive blood cultures and 52 (335/637) of positive gastric aspirates. Although only 3,372 (55) of all live births were screened, 637 (10) had gastric bacterial carriage at birth; of those, 335 (5.5) involved GBS. Similarly, there were 194 (3.2) positive blood cultures, of which 89 (1.5) involved GBS. In this report, all newborns who presented with a positive GBS blood culture had at least one of the external tests positive for GBS (gastric, ear canal, rectum and placenta). Thirty-seven per cent (14/38) of positive neonatal blood cultures occurred in newborns with foetid liquor while in deliveries with intrapartum fever 16.5 (32/195) of blood cultures were positive. In our clinical practice, characteristics that were evident in the delivery room (without knowledge of prenatal follow-up) such as foetid liquor, intrapartum fever, prolonged rupture of membranes, foetal tachycardia and meconium staining were associated with the great majority of neonatal sepsis.