儿童博卡病毒感染的临床特点

目的了解儿童博卡病毒(Human bocavirus,HBoV)感染的临床特征,探讨博卡病毒感染的疾病相关性。方法收集从2005年10月至2006年2月因急性呼吸道感染住院儿童鼻咽抽吸物(nasopharyngeal aspirates,NPA)148份,并采集了2份博卡病毒呼吸道样本阳性患者的血清。采用聚合酶链式反应(PCR)扩增的方法,对鼻咽抽吸物及血清标本进行了检测,并进行序列测定。结果从148份急性呼吸道鼻咽抽吸物中检出11份博卡病毒感染阳性,阳性检出率为7.4%,所获得的2例博卡感染血清核酸扩增也呈阳性。该11例博卡病毒阳性患者临床主要表现为支气管炎,支气管肺炎或肺炎症状,部分患者伴随有腹泻症状。结论博卡病毒感染患者均有下呼吸道感染表现,博卡病毒可能是引起下呼吸道感染的一个重要病原;博卡病毒血清阳性提示,博卡病毒有可能引起病毒血症;博卡病毒感染除表现下呼吸道症状外,有可能引起肠道等其他相关症状。

Clinical characteristics of bocavirus infection among children

Objective To study the clinical characteristics of human bocavirus (HBoV) among children and to understand the association of HBoV with human diseases. Method Totally 148 nasopharyngeal aspirate (NPA) samples were collected from hospitalized children with acute respiratory infection during Oct. 2005 to Feb. 2006. Two serum samples were obtained from HBoV positive patients. PCR was used to assay all these samples and PCR products were sequenced. Result HBoV was positive in 11 of 148 NPA samples. The positive rate was 7.4%. The serum samples of HBoV infected patients showed that serum contained HBoV by PCR assay. All these HBoV positive patients had the clinical symptoms of bronchitis, bronchopneumonia and pneumonia. Some patients had diarrhea. Conclusion All patients infected with HBoV had upper and lower respiratory tract infections. HBoV is a probable important pathogen of upper and lower respiratory tract infection. The HBoV could cause viremia. In addition, HBoV infection probably could also result in intestinal disease and other related symptoms.