Human Bocavirus and KI/WU Polyomaviruses in Pediatric Intensive Care Patients

We evaluated the prevalence of human bocavirus and KI and WU polyomaviruses in pediatric intensive care patients with and without lower respiratory tract infection (LRTI). The prevalence of these viruses was 5.1%, 0%, and 2.6%, respectively, in children with LRTI and 4.8%, 4.8%, and 2.4%, respectively, in those without LRTI.     

Novel Human Bocavirus in Children with Acute Respiratory Tract Infection

Human bocavirus (HBoV) and HBoV2, two human bocavirus species, were found in 18 and 10 of 235 nasopharyngeal aspirates, respectively, from children hospitalized with acute respiratory tract infection. Our results suggest that, like HBoV, HBoV2 is distributed worldwide and may be associated with respiratory and enteric diseases.     

Human bocavirus infection among children, Jordan

Human bocavirus was detected in 57 (18.3%) of 312 children with acute respiratory infection (ARI) who required hospitalization in Jordan. It was also detected in 30 (21.7%) of 138 children with severe ARI, in 27 (15.5%) of 174 with mild or moderate disease, and in 41 (72%) of 57 with other pathogens.     

武汉市呼吸道感染儿童博卡病毒的检测及临床分析

目的 分析武汉市呼吸道感染儿童博卡病毒(HBoV)感染的临床特点,为临床治疗提供理论依据。方法 收集2014年12月1日-2015年12月1日期间在本院儿科住院的365例急性呼吸道感染患儿为研究对象,在疾病急性期用一次性吸痰管采集患儿鼻咽分泌物(NPA)标本液2 ml。先进行7种常见呼吸道病毒的筛查,然后采用PCR方法检测HBoV 基因,对阳性标本进行序列验证及分析。结果 1)对365份标本进行免疫荧光检测,结果显示呼吸道合胞病毒(RSV)的阳性检出率最高18.90%(69/365),其他依次为腺病毒(ADV)阳性15例(4.11%),副流感病毒Ⅲ(PIV-Ⅲ)阳性8例(2.20%),甲型流感病毒(IFV-A)阳性5例(1.37%),乙型流感病毒(IFV-B)阳性3例(0.82%),副流感病毒Ⅱ型(PIV-Ⅱ)阳性2例(0.55%)。2)365例标本中,32例(8.77%)出现HBoV 的PCR扩增产物,均为单一条带,大小约为354 bp,与预期的扩增片段大小相符合,显示为HBoV阳性。32例阳性标本进行测序后经Blast分析,HBoV1型28例(7.67%),HBoV2型3例(0.82%),HBoV3型1例(0.27%)。3)32例HBoV阳性患儿中,其中男19例,女13例,男女比例为1.47∶1;年龄3~13个月,平均6.87个月。结论 HBoV 感染是引起武汉市小儿呼吸道感染的重要病毒之一,主要以HBoV1型感染为主,而且多为混合感染。应加强对婴幼儿的预防保健工作,以便进行合理用药、早期治疗。     

Human bocavirus in French children

Human bocavirus (HBoV), a new member of the genus Bocavirus in the family Parvoviridae, has been recently associated with respiratory tract infections. We report the epidemiologic and clinical features observed from a 1-year retrospective study of HBoV infection in young children hospitalized with a respiratory tract infection.     

小儿急性呼吸道感染与人博卡病毒相关性的研究

目的:了解小儿急性呼吸道感染与人博卡病毒(Human Bocavirus,HBoV)的相关性。方法:对2008年1～5月在长春市儿童医院住院的1007例急性呼吸道感染患儿鼻咽深部分泌物样本用PCR扩增的方法进行HboV NS1基因检测。随机选取8例HBoV阳性产物进行测序,并将测到的序列与GenBank中的基因序列和HBoV阳性病例的临床资料进行分析。结果:1007例标本共检测出44例HBoV阳性,阳性率为4.37%,其中急性上呼吸道感染、急性支气管炎、毛细支气管炎和支气管肺炎患儿人博卡病毒阳性检出率分别为1.29%(2/155)、5.71%(2/35)、8.70%(2/23)和4.79%(38/794)。HboV急性呼吸道感染的年龄分布为1岁以下39例,占88.64%;1岁以上5例,占11.36%;男女性别比值是1.75∶1;临床表现咳嗽伴喘憋占97.56%,咳嗽伴腹泻占34.14%,入院时体温升高占54.55%,肺部听诊闻及干和/或湿性罗音者占95.12%,X线胸片片状影占87.80%,病程平均为13.79天。结论:人博卡病毒是引起小儿急性呼吸道感染的病原之一;HboV所致呼吸道感染部位多在下呼吸道;感染患儿以1岁以内婴儿为主。     

天津地区儿童人博卡病毒感染及基因型分析

目的 了解天津地区急性下呼吸道感染儿童中人博卡病毒(HBoV)的感染情况及病毒基因特性.方法 采集2008年9月- 2009年5月急性下呼吸道感染住院儿童的鼻咽吸取物标本202份,进行PCR扩增来检测HBoVNP-1基因,对VP1及VP2基因进行扩增及序列测定,与GenBank中登录的序列进行比较,分析序列特征并绘制种系发生树,同时采用多重PCR方法检测其他12种呼吸道病毒及WU多瘤病毒.结果 202份标本中,6.9％( 14/202)为HBoV阳性,所有阳性患儿的年龄均≤6岁,6月～12月龄患儿感染率最高,为14.3％ (6/42);所有感染者均为肺炎和喘息性支气管炎患儿,各月份均有检出;HBoV与其他病毒的混合感染率为85.7％ (12/14),其中58.3％ (7/12)为3种以上呼吸道病毒混合感染;VP1/VP2基因种系发生树分析表明13株HBoV均属于Ib簇,同源性分析表明,天津地区HBoV VP1基因与从GenBank下载的Ⅰ型序列比较,核酸及氨基酸的同源性分别为99.0％～ 99.8％及99.0％ ～99.9％.结论 天津地区存在HBoV流行,感染者多为＜6岁儿童,HBoV与其他呼吸道病毒混合感染常见,HBoV病毒均属于Ib簇.     

Severe Human Bocavirus–Associated Pneumonia in Adults at a Referral Hospital,Seoul, South Korea

We report a case series of severe human bocavirus–associated pneumonia in adults in Seoul, South Korea. The virus accounted for 0.5% of all severe pneumonia cases. Structural lung disease and hematologic malignancy were common underlying diseases. Overall death rate was 54.5%. Higher death rates were associated with co-infection (83.3%) and immunocompromise (80.0%).     

成都地区2009-2013年儿童人博卡病毒感染分析

目的 了解四川成都地区急性呼吸道感染住院患儿人博卡病毒(HBoV)的感染情况,分析其流行特征。方法 采集2009年10月-2013年10月年成都市某妇女儿童医院因呼吸道感染而住院的患儿鼻咽抽提物,提取核酸,用巢式PCR方法检测人博卡病毒;同时对流感病毒等其他7种呼吸道病毒进行检测,了解混合感染情况;用统计学软件对检测结果及病例信息进行分析。结果 在1842份标本中,HBoV检出率为6.84%(126/1842),与其他呼吸道病毒混合感染率为58.73%(74/126);患儿以下呼吸道感染为主,1~2岁检出率最高,为7.83%(108/1379);HBoV感染未见明显的季节性分布特点。结论 HBoV为成都地区儿童发热呼吸道症候群的主要病原之一,>2岁儿童检出率最高,且与其他病毒有较高的混合感染率。     

Absence of Detectable Replication of Human Bocavirus Species 2 in Respiratory Tract

Human bocavirus (HBoV) commonly infects young children and is associated with respiratory disease; disease associations of the divergent HBoV-2 species are unknown. Frequent HBoV-2 detection in fecal samples indicated widespread circulation in the United Kingdom and Thailand, but its lack of detection among 6,524 respiratory samples indicates likely differences from HBoV-1 in tropism/pathogenesis.     

Human bocavirus, a respiratory and enteric virus

In Spain, human bocavirus (HBoV) was detected in 48 (9.1%) of 527 children with gastroenteritis at similar frequency as for children with respiratory illness (40/520, 7.7%). Fecal excretion adds new concern about the transmission of HBoV. To our knowledge, this report is the first to document HBoV in human feces.     

Emergent strain of human adenovirus endemic in Iowa

We evaluated 76 adenovirus type 7 (Ad7) isolates collected in Iowa from 1992 to 2002 and found that genome type Ad7d2 became increasingly prevalent. By 2002, it had supplanted all other Ad7 genome types. The association of Ad7d2 with severe illness and death calls for heightened public health concern.     

急性呼吸道疾病爆发流行的病原学研究

目的 对2004年4月起在江苏苏北及其邻近地区发生中、小学生爆发急性呼吸道疾病(ARD)流行的集中发热并伴有头痛、头晕、咽痛、扁桃体炎病例进行病因研究。方法 对流行区20位患者的咽拭子标本分离病原体，并对阳性分离株进行免疫荧光、聚合酶链反应(PCR)以及电镜检测。结果 MDCK(35代)、LLC-MK2、Vero E6、MRC-5(39代)分离培养均未出现细胞病变；军团菌培养亦未发现阳性结果；经人喉癌传代细胞(Hep-2)分离培养，20份标本中13份出现了明显的细胞病变效应，电镜下可见细胞胞核内大量呈晶格状排列的典型腺病毒颗粒，直接免疫荧光试验及PCR检测均证实为腺病毒感染。结论 2004年4月发生在江苏省苏北地区中、小学急性呼吸道感染疫情的病原体为腺病毒。     

Bocavirus infection in hospitalized children, South Korea

This study presents the first evidence of human bocavirus infection in South Korean children. The virus was detected in 27 (8.0%) of 336 tested specimens, including 17 (7.5%) of 225 virus-negative specimens, collected from children with acute lower respiratory tract infection.     

2015 - 2017年上海市黄浦区成人急性呼吸道感染病例病原学监测分析

目的 探索上海市黄浦区成人急性呼吸道感染病例（ARI）的病原体感染分布特征。方法 采集黄浦区监测点369例急性呼吸道感染病例的呼吸道标本进行多重PCR以及细菌培养等检测,分析病原体感染的流行特征。结果 2015 - 2107年共收集了369例ARI病例,检出12种病原体,病原体检出阳性率为55.01%（203/369）。其中甲型流感病毒阳性率最高,为25.56%（98/369）,乙型流感病毒阳性率为9.76%（36/369）,肺炎克雷伯菌为4.61%（17/369）,鼻病毒/肠道病毒为3.79（14/369）。检出的病原体感染中混合感染率为5.42%（20/369）。不同年龄组感染率有所不同,16～24岁年龄组感染率较高（68.00%,17/25）,60岁及以上年龄组感染率较低（44.90%,66/147）。冬季和夏季是呼吸道病原体阳性率较高,检出阳性率分别为69.11%（85/123）、60.32%（76/126）。流感有季节性特征,夏季阳性率为17.34%（64/369）,冬季阳性率为14.36%(53/369）。结论 上海市黄浦区成人呼吸道感染病例中病原体主要以病毒为主,其中季节性流感检出阳性率最高。不同年龄组感染率有差异,冬季和夏季是呼吸道病原体感染流行的高峰。     

Primary and Secondary Human Bocavirus 1 Infections in a Family,Finland

Human bocavirus 1 (HBoV1) was detected in a young child hospitalized for pneumonia and subsequently in his twin brother and other family members. The mother’s nasopharyngeal samples intermittently showed HBoV1 DNA; the grandmother had HBoV1 reinfection. Findings in this family lead to consideration of HBoV virulence, latency, and reactivation.