Neonatal Medicine

The Korean Society of Neonatology (대한신생아학회)
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Analyses of Clinical Characteristics and Hematologic Studies of Confirmed Infants by Extended Spectrum $\beta$-lactamase Producing Escherichia coli or Klebsiella pneumonia in Neonatal Intensive Care Unit

단일병원 신생아 중환자실에서 Extended Spectrum $\beta$-lactamase 를 생성하는 Escherichia coli 혹은 Klebsiella pneumoniae가 확인된 신생아들의 임상적 특징 및 혈액학적 검사의 분석

  • Lee, Sun-Geun (Department of Pediatrics, Inje University College of Medicine, Sanggye Paik Hospital) ;
  • Choi, Min-Hwan (Department of Pediatrics, Inje University College of Medicine, Sanggye Paik Hospital) ;
  • Shim, Gyu-Hong (Department of Pediatrics, Inje University College of Medicine, Sanggye Paik Hospital) ;
  • Chey, Myoung-Jae (Department of Pediatrics, Inje University College of Medicine, Sanggye Paik Hospital)
  • 이선근 (인제대학교 상계백병원 소아청소년과학교실) ;
  • 최민환 (인제대학교 상계백병원 소아청소년과학교실) ;
  • 심규홍 (인제대학교 상계백병원 소아청소년과학교실) ;
  • 최명재 (인제대학교 상계백병원 소아청소년과학교실)
  • Published : 2011.11.30
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Abstract

Purpose: Extended spectrum $\beta$-lactamase (ESBL) producing organism is an important cause of infections in the neonatal intensive care unit (NICU) since 1990s. The aim of this study is to investigate the differences of clinical characteristics and hematologic studies between neonates with ESBL-positive organism and those with ESBL-negative organism. Methods: The subjects included 48 neonates admitted to NICU at Inje University Sanggye Paik Hospital from January 2005 to September 2010, from whom a total of 58 Escherichia coli or Klebsiella pneumonia were detected. The data were categorized in 2 groups, neonates with ESBL-positive and ESBL-negative. We compared clinical characteristics and hematologic studies between two groups. Results: Of 48 neonates and 53 isolates, ESBL-positive were 18 neonates and 20 isolates. Both ESBL-positive and ESBL-negative isolates were largely found in urine, each with 10 and 23. Of 20 ESBL-positive isolates, 13 (65%) and 7 (35%) were ESBL producing Escherichia coli and Klebsiella pneumonia, respectively. ESBL-positive neonates were associated with low 1 and 5 minutes Apgar scores (P=0.002 and P=0.001, respectively), more uses of oxygen (56% vs. 27%; P=0.005), longer duration of oxygen uses (15.8${\pm}$38.43 days vs. 4.3${\pm}$12.5 days; P=0.008) and more frequent anemia (33% vs. 7%; P=0.040). Conclusion: ESBL-positive neonates may have more anemia and lower Apgar score at birth. We can consider the use of cabapenem earlier if infant with previous antibiotics is confirmed to be infected with ESBL-positive organisms.

목적: ESBL 생성 균주는 1990년대 접어들어 신생아 중환자실에서 중요한 감염증 원인균 중하나로 대두되었다. 본 연구에서는 ESBL 생성하는 E. coli 및 K. pneumoniae에 감염된 신생아들과 ESBL 음성인 E. coli 및 K. pneumoniae에 감염된 신생아들에 있어서 임상적인 특징 및 혈액학적 검사 소견 등의 차이점을 알아보고자 본 연구를 시행하였다. 방법: 2005년 1월부터 2010년 9월까지 인제대학교 상계백병원 신생아 중환자실에 입원 한 환아 중 배양 검사에서 E. coli 또는 K. pneumoniae가 분리된 48명, 55균주를 대상으로 ESBL 생성 여부에 따라서 두 군으로 구분하여 임상적 특징 및 혈액학적 검사 소견을 의무기록을 토대로 조사하여 두 군간 비교를 시행하였다. 결과: 배양 검사에서 ESBL 양성은 총 18명 20균주였고, ESBL 음성은 총 30명 35균주 였다. ESBL 생성 20균주 중 E. coli 가 13균주, K. pneumoniae가 7균주 였다. ESBL 양성 균주와 ESBL 음성 균주 소변배양 검사에서 각각 10균주 및 23균주로 가장 많이 검출되었다. 1분 및 5분 Apgar 점수는 ESBL 양성 환아군에서 통계학적으로 유의하게 더 낮았고(P=0.002, P=0.001). 산소 공급 필요성은 ESBL 양성 환아군에서 더 많았고(56% vs. 27%;P=0.005), 산소 공급 일수도 ESBL 양성 환아군에서 더 길었다(15.8${\pm}$38.43일 vs. 4.3${\pm}$12.5일; P=0.008). 배양 검사 양성 시점의 발열, 무호흡, 산모력, 성별, 재태 연령, 출생 체중에서는 두 군간 유의한 차이는 없었다. 혈액학적 검사에서 배양 검사 양성 시점 빈혈은 ESBL 양성 환아군에서 더 많았으나(33% vs. 7%;P=0.040) 혈색소, 백혈구수, 혈소판수 및CRP는 유의한 차이를 보이지 않았다. 결론: ESBL 양성 환아군이 음성인 환아군에 비해 Apgar 점수가 낮았고 상대적으로 빈혈이 더 빈번하였다. 출생 시에 낮은 Apgar 점수를 보이는 환아들 중에서 기존 항생제를 사용 중인 환아에서 감염증의 새로운 증상이 보이거나 환아의 상태가 악화되는 경우에는 조기에 carbapenem 항생제를 사용하는 것을 고려할 수 있을 것으로 생각된다.

Keywords

References

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