Tuberculosis and Respiratory Diseases

The Korean Academy of Tuberculosis and Respiratory Diseases (대한결핵및호흡기학회)
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Antimicrobial Resistance of Bacteria Isolated from Bronchoalveolar lavage (BAL) in Patients with Lung Infiltrations in Burn and Non-Burn Intensive Care Unit

화상 중환자실과 비화상 중환자실 폐 침윤 환자에서 기관지폐포 세척술(BAL)을 통해 획득한 호흡기 검체에서 분리된 균주에 대한 항균제 내성 실태

  • Kim, Jong-Yeop (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Kim, Cheol-Hong (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Park, Soo-Hee (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Ko, Yoo-Sang (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Kim, Mi-Jung (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Kang, Hye-Ryun (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Hwang, Yong Il (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Park, Yong-Bum (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Jang, Seung-Hoon (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Woo, Heungjeong (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Kim, Dong-Kyu (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Lee, Myung-Koo (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Hyun, In-Gyu (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Jung, Ki-Suck (Department of Internal Medicine, Hallym University College of Medicine)
  • 김종엽 (한림대학교 의과대학 내과학교실) ;
  • 김철홍 (한림대학교 의과대학 내과학교실) ;
  • 박수희 (한림대학교 의과대학 내과학교실) ;
  • 고유상 (한림대학교 의과대학 내과학교실) ;
  • 김미정 (한림대학교 의과대학 내과학교실) ;
  • 강혜련 (한림대학교 의과대학 내과학교실) ;
  • 황용일 (한림대학교 의과대학 내과학교실) ;
  • 박용범 (한림대학교 의과대학 내과학교실) ;
  • 장승훈 (한림대학교 의과대학 내과학교실) ;
  • 우흥정 (한림대학교 의과대학 내과학교실) ;
  • 김동규 (한림대학교 의과대학 내과학교실) ;
  • 이명구 (한림대학교 의과대학 내과학교실) ;
  • 현인규 (한림대학교 의과대학 내과학교실) ;
  • 정기석 (한림대학교 의과대학 내과학교실)
  • Received : 2007.03.26
  • Accepted : 2007.05.16
  • Published : 2007.06.30
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Abstract

Background: Nosocomial pneumonia in an intensive care unit (ICU) is associated with a high mortality rate. Diagnosing a respiratory tract infection in critically ill patients is still difficult but detailed information for the pathogens is needed to establish an adequate antimicrobial treatment. This study examined the causative organisms and their antimicrobial resistance using bronchoalveolar lavage (BAL) from patients suspected of having pneumonia in the ICU. Methods: From January 2004 to June 2006, ICU patients with diffuse lung infiltration were prospectively enrolled. The BAL was used to diagnose the respiratory infection, with 104 > or = organisms considered a positive result. The most common organisms and their antimicrobial resistances were analyzed from the quantitative BAL cultures in the burn ICU and non-burn ICU. Results: A total 72 patients were included, 35 (M 29, F 6) in the burn ICU and 37 (M 26, F 11) in the non-burn ICU. 27 patients (77.1%) in the burn ICU and 22 patients (59.5%) in the non-burn ICU met the criteria for a positive BAL culture. The major pathogens were Staphylococcus aureus, Acinetobacter species and Pseudomonas aeruginosa. All strains (100%) of Staphylococcus aureus isolated from BAL (9 cases) were methicillin-resistant (MRSA) in the burn ICU, but 5 strains (71.4%, 7 cases) were MRSA in the non-burn ICU. Regarding Pseudomonas aeruginosa, the rate of resistance to amikacin, ciprofloxacin, cefepime, imipenem, ceftazidime, piperacillin/tazobactam in the burn and non-burn ICU ranged from 45.5% to 90% and 25% to 50%, respectively. In addition, the rate of resistance of Acinetobacter species to the above drugs in the burn and non-burn ICU ranged from 81.8% to 100% and 62.5% to 100%, respectively. Conclusions: These results are expected to provide useful guidelines for choosing the effective empirical antimicrobial therapy in patients with lung infiltrations in the burn and non-burn ICU.

연구배경: 원내 폐렴의 적절한 항균제 치료를 위해서는 원발 병소에서의 원인균 규명과 항균제에 대한 내성 유무 확인이 필수적이다. 본 연구는 원내 폐렴이 의심되는 경우 기관지내시경을 통한 정량적 기관지폐포 세척술(bronchoalveolar lavage, BAL) 배양검사를 시행하여 빈번하게 분리되는 균주와 이들의 항균제 내성 현황을 알아보고자 하였다. 방 법: 2004년 1월부터 2006년 6월까지 한림의대 한강성심병원 화상 중환자실과 비화상 중환자실에서 폐 침윤의 원인규명 위해 BAL 검사를 시행하였다. 104 CFU/mL 이상의 균주가 분리되면 양성으로 판정하였다. 결 과: BAL 검사 결과 화상중환자실 27예(77.1%), 비화상중환자실 22예(59.4%)에서 배양 양성이었다. 분리되는 주요 균주는 S. aureus, Acinetobacter species 및 P. aeruginosa 였다. 화상중환자실에서 분리된 S. aureus의 경우 전부 MRSA(100%)였으며, 비화상중환자실에서는 71.4%가 MRSA로 보고되었다. P. aeruginosa의 경우 화상중환자실 및 비화상중환자실에서 amikacin 54.6% vs. 50.0%, ciprofloaxacin 100% vs. 50%, cefepime 90.9% vs. 50%, imipenem 72.7% vs. 50%, ceftazidime 45.5% vs. 25% 및 piperacillin/tazobactam 90.9% vs. 50%의 내성률을, Acinetobacter species의 경우는 amikacin 90.9% vs. 100%, ciprofloxacin 100% vs. 87.5%, cefepime 90.9% vs. 100%, imipenem 100% vs. 62.5%, ceftazidime 90.9% vs. 100% 및 piperacillin/tazobactam 81.8% vs. 62.5%의 내성률을 보여주었다. 결 론: 화상중환자실과 비화상중환자실에서 원내 폐렴이 의심되는 환자의 원인균 분포와 약제 내성 현황을 알 수 있었으며 향후 항균제 치료 전략에 도움을 줄 것으로 사료된다.

Keywords

References

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