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Serological investigation of Ureaplasma urealyticum in Korean preterm infants

 Ho Seon Eun  ;  Soon Min Lee  ;  Min Soo Park  ;  Kook In Park  ;  Ran Namgung  ;  Chul Lee 
 Korean Journal of Pediatrics, Vol.56(11) : 477-481, 2013 
Journal Title
Korean Journal of Pediatrics
Issue Date
Bronchopulmonary dysplasia ; Serovar ; Ureaplasma urealyticum
Purpose: Ureaplasma colonization is related with perinatal complications in preterm infants. Little is known about the difference in virulence among various Ureaplasma urealyticum serovars. The aim of this study was to determine U. urealyticum serovars of preterm infants in order to assess whether any of the serovars were associated with bronchopulmonary dysplasia (BPD). Methods: Three hundred forty-four preterm infants with a gestational age less than 34 weeks admitted to Gangnam Severance Hospital neonatal intensive care unit from July 2011 to December 2012 were included in this study. Tracheal and gastric aspirations were conducted on infants to confirm Ureaplasma colonization. Ureaplasma colonization was confirmed in 9% of infants, of these, serovars were determined by real-time polymerase chain reaction. Results: A total of 31 infants (gestational age, 29.3±3.1 weeks; birth weight, 1,170±790 g) were U. urealyticum positive. The Ureaplasma positive group treated for more days with oxygen and ventilation than the negative group (P<0.05). Histologic chorioamnionitis and moderate to severe BPD were more frequent in the Ureaplasma positive group than in the negative group (P<0.05). U. urealyticum isolates were either found to be a mixture of multiple serovars (32%), serovar 9 alone or combined with other serovars (39%), serovar 11 (26%), 2 (13%), 8 (10%), 10 (13%), and 13 (25%). No individual serovars were significantly associated with moderate to severe BPD and chorioamnionitis. Conclusion: This is the first study to describe the distribution of U. urealyticum serovars from Korean
preterm infants. Ureaplasma -colonized infants showed higher incidence of BPD and chorioamnionitis.
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1. College of Medicine (의과대학) > Dept. of Pediatrics (소아과학교실) > 1. Journal Papers
Yonsei Authors
Namgung, Ran(남궁란) ORCID logo https://orcid.org/0000-0001-7182-9535
Park, Kook In(박국인) ORCID logo https://orcid.org/0000-0001-8499-9293
Park, Min Soo(박민수) ORCID logo https://orcid.org/0000-0002-4395-9938
Eun, Ho Seon(은호선) ORCID logo https://orcid.org/0000-0001-7212-0341
Lee, Soon Min(이순민) ORCID logo https://orcid.org/0000-0003-0174-1065
Lee, Chul(이철)
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