CAJ | 학술논문

目的了解HCOV-NL63在长沙地区急性下呼吸道感染住院儿童中的流行状况以及临床特征.方法采集长沙地区2008年9月至2010年10月因急性下呼吸道感染住院儿童NPA样本1185份,用RT-PCR方法检测HCOV-NL63N基因,阳性扩增产物经测序确认,统计分析临床资料.结果 1185份NPA样本中,HCOV-NL63检出阳性10份,检出率为0.8％,其中春季检出1例、夏季检出6例、秋季检出2例、冬季检出1例；阳性检出病例患儿年龄最大2岁半,最小2个月,平均月龄12.5个月；男童7例,女童3例；临床诊断为支气管肺炎6例、毛细支气管炎3例、急性喉气管支气管炎1例；10例中有4例病情危重；4例有基础疾病；7例合并其他病毒混合感染；阳性扩增产物经测序分析与HCOV-NL63参考株同源性为97％～100％.结论本资料HCOV-NL63阳性检出患儿年龄均在3岁以下；夏季检出率高；男童感染为主；单一基因型在长沙地区流行；HCOV-NL63可能也是我国儿童急性下呼吸道感染中的一种病原.
목적 료해HCOV-NL63재장사지구급성하호흡도감염주원인동중적류행상황이급림상특정.방법 채집장사지구2008년9월지2010년10월인급성하호흡도감염주원인동NPA양본1185빈,용RT-PCR방법검측HCOV-NL63N기인,양성확증산물경측서학인,통계분석림상자료.결과 1185빈NPA양본중,HCOV-NL63검출양성10빈,검출솔위0.8％,기중춘계검출1례、하계검출6례、추계검출2례、동계검출1례；양성검출병례환인년령최대2세반,최소2개월,평균월령12.5개월；남동7례,녀동3례；림상진단위지기관폐염6례、모세지기관염3례、급성후기관지기관염1례；10례중유4례병정위중；4례유기출질병；7례합병기타병독혼합감염；양성확증산물경측서분석여HCOV-NL63삼고주동원성위97％～100％.결론 본자료HCOV-NL63양성검출환인년령균재3세이하；하계검출솔고；남동감염위주；단일기인형재장사지구류행；HCOV-NL63가능야시아국인동급성하호흡도감염중적일충병원.
Objective The main objective of this study was to explore the prevalence and clinical characteristics of human coronavirus NL63 infection in hospitalized children with acute lower respiratory tract infection (ALRTI) in Changsha.Methods Nasopharyngeal aspirates (NPA) samples were collected from 1185 hospitalized children with ALRTI at the People's Hospital of Hunan province,between September 2008 and October 2010.Reverse transcriptase polymerase chain reaction (RT-PCR) was employed to screen for coronavirus NL63,which is a 255 bp fragment of a part of N gene.All positive amplification products were confirmed by sequencing and compared with those in GenBank.Results The overall frequency of coronavirus NL63 infection was 0.8％,6 (60％) out of the coronavirus NL63 positive patients were detected in summer,2 in autumn,1 in spring and winter,respectively.The patients were from 2 months to two and a half years old.The clinical diagnosis was bronchopneumonia ( 60％ ),bronchiolitis ( 30％ ),and acute laryngotracheal bronchitis( 10％ ).Four of the 10 cases had critical illness,4 cases had underlying diseases,and 7 cases had mixed infection with other viruses. The homogeneity of coronavirus NL63 with those published in the GenBank at nucleotide levels was 97％-100％.Conclusion Coronavirus NL63 infection exists in hospitalized children with acute lower respiratory tract infection in Changsha.Coronavirus NL63 infections are common in children under 3 years of age.There is significant difference in the infection rate between the boys and the girls:the boys had higher rate than the girls.The peak of prevalence of the coronavirus NL63 was in summer.A single genetic lineage of coronavirus NL63 was revealed in human subjects in Changsha.Coronavirus NL63 may also be one of the lower respiratory pathogen in China.