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Journal of the Korean Society of Neonatology 2009;16(1):47-54.
Published online May 1, 2009.
Association between Ureaplasma urealyticum Colonization and Adverse Outcomes in Premature Infants.
Jin Sang Yun, Sun Jung Chang, Heui Seung Jo, Kyu Hyung Lee
Department of Pediatrics, CHA Bundang Medical Center, CHA University, Seongnam, Korea. joneona@cha.ac.kr
출생 시 Ureaplasma urealyticum 집락이 조산아의 임상 양상에 미치는 영향
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Present evidences suggest that Ureaplasma urealyticum is a cause of pneumonia, septicemia, and bronchopulmonary dysplasia (BPD) in newborn infants, particularly those born prematurely. The purpose of this work was to examine the relationship between Ureaplasma urealyticum in the tracheal aspirates and adverse outcomes, such as BPD and early onset neonatal sepsis in premature infants.
A polymerase chain reaction (PCR) was performed on tracheal aspirates collected within 24 hour after birth in 176 premature infants less than 35 weeks of gestation and admitted to the neonatal intensive care unit of Bundang CHA Hospital.
U. urealyticum was detected in 37 of 176 preterm infants (21.0%). Gestational age (29+5+/-2+5 wk vs. 30+6+/-2+5 wk, P=0.013) and birth weight (1.39+/-0.44 kg vs. 1.59+/-0.55 kg, P=0.037) were lower in the U. urealyticum-positive group compared to the control group. The incidence of early onset neonatal sepsis (16.2% vs. 6.5%, P=0.045) and BPD (45.9% vs. 29.5%, P=0.047) was higher in the U. urealyticum-positive group compared to the control group, but the severity of BPD was not different between two groups. However, multiple logistic regression analysis revealed that the presence of U. urealyticum was not independently related to the development of early onset neonatal sepsis and BPD.
The results suggest that colonization of the lower respiratory tract by U. urealyticum might not be related to the development of neonatal sepsis and BPD directly in preterm infants.
Key Words: Ureaplasma urealyticum; Polymerase chain reaction; Bronchopulmonary dysplasia; Early onset neonatal sepsis


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