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KMID : 1039920170240030123
Neonatal Medicine
2017 Volume.24 No. 3 p.123 ~ p.128
Clinical Effects of Ureaplasma urealyticum Colonization in Maternal Vaginal Fluid at Second Trimester on Neonatal Outcomes of Premature Infant ¡Â35 Weeks¡¯ Gestational Age
Han Yea-Seul

Chun Sang-Hoon
Chun Ji-Young
Sung Tae-Jung
Abstract
Purpose: The purpose of this study was to evaluate the relationship between maternal genital Ureaplasma urealyticum colonization in the second trimester and the neonatal outcomes.

Methods: We studied 577 premature infants born at ¡Â35 weeks¡¯ gestational age (GA) at Hallym University, Kangnam Sacred Heart Hospital from January 2008 to December 2014. Maternal vaginal specimens were collected and polymerase chain reaction and/or culture tests were done in the second trimester of pregnancy. The subjects were divided into 2 groups: a Uu colonization-positive group (UU) and a Uu-negative (control) group. Subgroup analyses were performed in extremely premature (23?28 weeks¡¯ GA) and premature (29?35 weeks¡¯ GA) infants. Various clinical outcomes were compared.

Results: Of 577 preterm infants, 311 were delivered with maternal Uu infection (UU, 53.9%). Mean GA (30.0¡¾3.6 weeks vs. 31.0¡¾3.7 weeks, P=0.010) and birth weight (1,685.6¡¾680.4 g vs. 1,932.7¡¾733.1 g, P=0.003) were lower in the UU group than in controls. However, there were no significant differences in GA and birth weight in extremely premature group. Premature labor (P=0.002) and histological chorioamnionitis (P=0.032) was significantly more common in the UU group, especially in mothers who delivered in third trimester (29?35 weeks¡¯ GA). In particular, the incidence of moderate-to-severe BPD was statistically higher in UU extremely premature group (60.8% vs. 32.2%) (P=0.001).

Conclusion: Maternal colonization with Uu was associated with an increase in premature delivery and lower birth weights. Moderate-to-severe BPD was more common in premature infants born at ¡Â28 weeks¡¯ GA with maternal Uu colonization.
KEYWORD
Bronchopulmonary dysplasia, Prematurity, Ureaplasma urealyticum
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