소아암 환자에서 2009 대유행 인플루엔자 A(H1N1) 감염의 임상적 고찰 및 계절 인플루엔자와의 비교 분석
2009 Pandemic Influenza A(H1N1) Infections in the Pediatric Cancer Patients and Comparative Analysis with Seasonal Influenza
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목적: 본 연구는 단일 기관에서 소아암 환자의 2009 인플루엔자 A(H1N1) [A(H1N1)pdm09] 감염 양상을 조사하고 이전의 계절 인플루엔자 감염과 비교 분석하고자 하였다. 방법: 삼성서울병원에서 2009년 8월부터 2010년 2월까지 A(H1N1)pdm09 감염, 2000년 1월부터 2009년 5월까지 계절 인플루엔자 A 감염이 확진된 소아암 환자의 의무기록을 후향적으로 분석하였다. 결과: 82명의 소아암 환자에서 A(H1N1)pdm09 감염이 확진되었다. 10명(12.2%)의 환자에서 하기도 감염증 또는 호흡기 외 감염이 발생하였다. 3명(3.7%)의 환자가 사망하였고 그 중 2명은 A(H1N1)pdm09 기여 사망이었다. 합병된 감염증과 관련하여 유의성을 가지는 위험인자는 감염의 시점(2009년 44-45주)과 병원 내 감염이었다. 이전의 계절 인플루엔자 A 감염과 비교하였을 때 임상적 특성에는 유의한 차이가 없었으나 A(H1N1) pdm09 감염에서 적극적인 항바이러스제 치료가 시행되었다. 결론: 소아암 환자에서 A(H1N1)pdm 감염은 경증부터 중증까지 다양한 임상 경과를 보였으며 이전의 계절 인플루엔자와 비교했을 때 임상 양상의 유의한 차이는 없었다.
Abstract
Purpose: This study was performed to compare the clinical characteristics of 2009 pandemic influenza A(H1N1) [A(H1N1) pdm09] and seasonal influenza A infection in the pediatric cancer patients. Methods: A retrospective review was performed in the pediatric cancer patients who had confirmed A(H1N1)pdm09 infection at Samsung Medical Center from August 2009 to February 2010. For the comparison, the medical records of pediatric cancer patients with seasonal influenza A from January 2000 to May 2009 were reviewed retrospectively. Results: Eighty-two A(H1N1)pdm09 infections were confirmed in the pediatric cancer patients. Ten patients (12.2%) developed complicated clinical course by lower respiratory infections or extrapulmonary infections; 4 pneumonia, 1 bronchitis, 1 pericarditis with pneumonia, 1 encephalitis with pneumonia, 2 meningitis and 1 pericarditis. Three patients received mechanical ventilator and ICU care. Three pediatric cancer patients (3.7%) died. The risk factors related to complicated A(H1N1)pdm09 infections were date of infection (44-45th week 2009) and nosocomial infection. When comparing with previous seasonal influenza A infections, more prompt and aggressive antiviral therapy was given in A(H1N1)pdm09 infections. Conclusion: The A(H1N1)pdm09 infections caused a various clinical manifestations including fatal cases in pediatric cancer patient during pandemic season. There was no significant difference in clinical course between influenza A(H1N1)pdm09 and seasonal influenza A infections except the antiviral treatment strategy.
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