Clinical and Experimental Pediatrics

The Korean Pediatric Society (대한소아청소년과학회)
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Outbreak of Acinetobacter septicemia in a neonatal intensive care unit

신생아 집중치료실에서 집단 발생한 Acinetobacter septicemia

  • Kim, Myo Jing (Department of Pediatrics, Il Sin Christian Hospital) ;
  • Lee, Hye Jin (Department of Pediatrics, Il Sin Christian Hospital) ;
  • Son, Sang Hee (Department of Pediatrics, Il Sin Christian Hospital) ;
  • Huh, Jae Won (Department of Pediatrics, Il Sin Christian Hospital)
  • Received : 2005.11.21
  • Accepted : 2006.02.20
  • Published : 2006.05.15
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Abstract

Purpose : Acinetobacter baumannii is increasingly recognized as an important cause of nosocomial infection, especially in neonatal intensive care units. But little is known about the clinical significance and hospital epidemiology of Acinetobacter species other than A. baumannii. The objective of this study is to describe the clinical characteristics and epidemiology of septicemia due to Acinetobacter species other than A. baumannii. Methods : We retrospectively reviewed 11 cases of blood culture proven nosocomial infection which occured in our neonatal intensive care unit from $4^{th}$ to $24^{th}$, February, 2004. To establish epidemiological analysis, we performed environmental cultures and an antibiogram was obtained from susceptability tests of isolated Acinetobacter species. Results : Clinical manifestations including fever, poor feeding, abdominal distension, diarrhea, bloody stool passage, vomiting, tachypnea and apnea were similar to other infectious diseases. Benign clinical courses were compared with poor prognose, including a high mortality rate in septicemia due to A. baumannii. The major predisposing factor among our patients was the presence of a peripheral intravascular catheter. Antibiogram was similar, but surveillance cultures of environmental specimens failed to identify the source of infection. Conclusion : Acinetobacter species other than A. baumannii were often considered relatively avirulent bacteria, but could be pathologic organisms if cultured in patients with clinical symptoms.

목 적: Acinetobacter baumannii는 숙주 저항력이 저하된 고위험군에서 주요 원내 감염균으로 잘 알려져 있으나 A. baumannii 이외의 Acinetobacter species의 경우 드물게 감염과 연관된 것으로 받아들여지는 등 임상적 중요성과 원내 감염원으로써의 역학에 대해 알려진 바가 적다. 저자들은 신생아 집중치료실에서 A. baumannii가 아닌 것으로 확인된 Acinetobacter species에 의해 집단 발생한 패혈증 11례를 경험하였기에 이에 대한 임상적, 역학적 특징을 알고자 본 연구를 실시하였다. 방 법: 2004년 2월 4일부터 24일까지 일신기독병원 신생아 집중치료실에서 감염되었던 환아의 혈액에서 Acinetobacter species가 배양된 11례를 대상으로 임상적 특징을 조사하였고, 집단 발생의 역학을 조사하기 위해 두 차례에 걸쳐 의료진 및 환경 검체에 대한 배양을 실시하였으며, 항생제 감수성 검사를 통해 환아에서 배양된 균주가 동일 균주인지를 알고자 하였다. 결 과: 임상 양상은 발열, 수유 부진, 복부 팽만, 설사, 혈변, 구토, 빈호흡, 무호흡 등 다양하였으나 다른 원인에 의한 감염증과 비슷하였다. 집중 치료를 요하는 중증 경과를 보인 경우가 없었고 항생제 치료에 즉각적인 반응을 보이며 회복되어 A. baumannii 감염증에서 흔히 보이는 중증의 임상 증상과 높은 사망률(11-57%)과 비교하여 경한 경과를 보였다. 도관 관련 균혈증 2례, 도관 관련 균혈증 의증 9례로 말초 정맥 도관이 중요 유발 인자로 고려되었다. 감염의 역학을 알고자 두 차례에 걸쳐 의료진의 손과 환경 검체에 대한 배양 검사를 실시하였으나 동일 균주를 분리하는데는 실패하였다. 결 론: 우리의 연구를 통해 A. baumannii 이외의 Acinetobacter species의 경우 상대적으로 비병원성으로 여겨졌으나 임상 증상이 동반되면서 환자에서 배양되면 감염의 원인균임을 알 수 있었다.

Keywords

References

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