人博卡病毒载量与儿童急性下呼吸道感染临床特征相关性研究

目的了解人类博卡病毒(HBoV)在儿童急性下呼吸道感染中的检出情况,并探讨HBoV载量与儿童急性下呼吸道感染临床特征的相关性。方法收集2011年3月至2014年3月因急性下呼吸道感染住院患儿的鼻咽抽吸物(NPAs)1 554份,采用实时荧光定量PCR检测12种RNA病毒和ADV、HBoV 2种DNA病毒,并同时检测HBoV阳性患儿的病毒载量。结果 1 554份标本中1 212份(77.99%)检出病毒,275份(17.70%)HBoV检出阳性。HBoV阳性病例中3岁者占94.9%,男性多于女性。275例HBoV阳性病例中,单一感染45例(16.36%),混合感染230例(83.64%),两者病毒载量的差异无统计学意义(P0.05)。有发热症状的HBoV阳性患儿病毒载量高于无发热者,有喘息症状的病毒载量高于无喘息者,差异均有统计学意义(P0.05)。轻、中、重度组急性下呼吸道感染患儿之间的病毒载量差异无统计学意义(P0.05)。结论 HBoV是儿童急性下呼吸道感染重要病原之一。病毒载量高的患儿,临床更易出现发热、喘息等症状,但疾病严重程度及混合感染与病毒载量之间无显著相关性。     

Detection of human bocavirus in hospitalised children

Aim:   The objectives of this study are to assess the frequency of human bocavirus (HBoV) infection in hospitalised children and to study the clinical symptoms associated with the detection of HBoV.
Methods:   Two groups of hospitalised children were included in this study: group 1 consisted of 1946 children hospitalised from 1st September 2004 to 30th May 2005, and group 2 consisted of 448 children hospitalised from 1st November 2003 to 30th March 2004. The respiratory specimens were tested by polymerase chain reaction.
Results:   In the first group, HBoV was detected by polymerise chain reaction in 11/828 (1.3%) of nasal specimens that tested negative for other respiratory viruses. One child tested positive for HBoV in both a nasal aspirate and stool sample. In the second group, nasal specimens were tested for all respiratory viruses, including HBoV. The presence of HBoV infection was detected in seven children (1.6%). Detection of a mixed viral population was observed in four of these children. The main symptoms in children infected with HBoV were rhinitis (50%), cough (45%), dyspnoea (28%), wheezing (28%), fever (23%) and diarrhoea (22%). The final clinical diagnoses were bronchiolitis (seven children), rhinopharyngitis (five children), the exacerbation of asthma (two children) and pneumonia (one child). Moreover, four children have associated gastroenteritis.
Conclusion:   These results contribute to the interest in the HBoV detection in children. HBoV detection in hospitalised children with or without any other respiratory virus detection was essentially associated with lower respiratory tract infection and in a lower score with upper respiratory tract infection and gastroenteritis.     

太原地区急性呼吸道人偏肺病毒和人博卡病毒感染患儿临床特征分析

目的了解太原地区急性呼吸道感染(ARTIs)儿童人偏肺病毒(hMPV)与人博卡病毒(HBoV)的感染情况及其临床和流行病学特征。方法采集2012年11月—2013年5月及2013年11月—2014年5月就诊的ARTIs患儿549例,采集咽拭子标本,应用实时PCR方法检测hMPV与HBoV。结果 549例患儿的咽拭子标本中hMPV阳性56例(10.2%),HBoV阳性15例(2.7%)。其中2012年11月—2013年5月hMPV与HBoV检出率分别为12.3%和2.0%,2013年11月—2014年5月hMPV与HBoV检出率分别为6.5%和4.0%,两时间段hMPV检出率差异有统计学意义(P0.05),HBoV检出率差异无统计学意义(P0.05);不同月份hMPV、HBoV检出率差异无统计学意义(P0.05)。hMPV与HBoV均在2岁组中检出率最高。hMPV在喘息性支气管炎与毛细支气管炎患儿中检出率最高。结论太原地区hMPV和HBoV与部分儿童尤其是婴幼儿ARTIs有关,hMPV是诱发部分婴幼儿喘息性疾病的重要病原体之一。     

住院呼吸道感染患儿博卡病毒检测分析

目的 了解人博卡病毒(HBoV)在天津地区急性呼吸道感染患儿中的检测情况和基因的遗传进化特征。方法 收集2012 年1~12 月确诊为急性呼吸道感染患儿的鼻咽抽吸物标本1 259 份,提取病毒核酸,采用实时荧光定量PCR 法检测HBoV,并采用PCR 法扩增阳性标本HBoV 核衣壳蛋白基因片段;随机选取部分产物进行测序确证,将所获得的序列与已知的HBoV 基因序列进行比对并进行系统进化分析;同时对所有标本进行其他多种呼吸道相关病毒检测。结果 1 259 份标本中HBoV 阳性检出率为4.53%(57/1 259),其中75%(43/57)发生在6~36 月龄的患儿;检出高峰主要集中在夏季(6~8 月);存在与其他病毒的混合感染情况。对其中36 份阳性标本的PCR 产物进行序列分析,证实检测结果确为HBoV,且与已知HBoV 的基因序列同源性较高。结论 天津地区部分儿童的急性呼吸道感染可能与HBoV 感染相关,且HBoV 感染在6~36 月龄的婴幼儿中更为常见,夏季为流行高峰;系统进化分析显示与已知HBoV 的基因序列同源性高,基因序列变异较小。     

Human bocavirus in children with acute lymphoblastic leukemia

A new human parvovirus, human bocavirus, has recently been identified in respiratory secretions, feces and serum. It is associated with lower and most likely also upper respiratory tract infections. Most commonly reported symptoms are cough, rhinorrhea, expiratory wheezing and fever, and the virus is preferentially detected in young children. We report three children with acute lymphoblastic leukemia who had acute febrile episodes with concomitant detection of human bocavirus in their respiratory secretions. One of them had five consecutive febrile episodes during 6 months, all associated with the presence of human bocavirus at varying viral loads, suggesting prolonged shedding or reactivation of the virus.     

2009—2010年苏州地区博卡病毒感染住院患儿临床特征分析

目的探讨苏州地区因急性呼吸道感染住院患儿中人类博卡病毒(human bocavirus,HBoV)感染的临床特征。方法收集2009年1月—2010年12月因急性呼吸道感染住院的3 826例患儿的痰标本,应用实时PCR检测HBoV DNA,直接免疫荧光法检测呼吸道合胞病毒、流感病毒(A、B)、副流感病毒(1～3)和腺病毒,同时采用逆转录PCR检测人偏肺病毒RNA,并进行细菌培养及荧光定量PCR检测支原体DNA,分析HBoV感染的临床特点及流行病学特征,并与呼吸道合胞病毒(RSV)进行比较。结果 3 816份标本共检测到HBoV 272例(7.13%),仅次于RSV;HBoV单独感染率为32.7%,与其他呼吸道病毒的合并感染率为18.38%,高于RSV和其他病毒的合并感染率(P<0.05)。HBoV感染全年均有发生,夏季最多;6～18月龄婴幼儿检出率最高,占48.17%。在住院患儿中,HBoV主要引起支气管肺炎(85.39%),临床症状主要表现为咳嗽(96.63%)、喘息(46.07%)、发热(56.18%)。与RSV相比,HBoV感染患儿的白细胞、中性粒细胞比例、CRP均高于RSV,差异有统计学意义(P<0.05)。结论 HBoV是苏州地区小儿呼吸道感染的重要病原体之一,有单独的致病性,与RSV相比,在年龄、季节分布、临床症状、实验室指标等方面有明显差异。     

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??Objective??To analyze the epidemiological characteristics of human bocavirus??HBoV?? infection in children with respiratory tract diseases??and to provide scientific basis for clinical diagnosis and treatment. Methods??Sputum specimens and clinical informations of 16 913 cases of hospitalized children with respiratory tract diseases from January 2009 to December 2016 in Children’s Hospital of Soochow University were collected. HBoV DNA was detected by fluorescence quantitative polymerase chain reaction at real time to analyze the detections. Results??The HBoV detection rate was 5.16%??873/16 913 cases?? in 16 913 children. The HBoV detection rate of boys was 5.42%??573/10 566 cases????which was significantly higher than that of girls??4.73%??300/6 347 cases????χ2??3.928??P??0.047??. The HBoV detection rate of children at the age of less than 1 year old??-3 years old??-7 years old and older than 7 years old were 4.03%??8.75%??3.99% and 1.29%??respectively??the difference of which had statistical significance??χ2??182.075??P??0.01??. The HBoV detection rate in spring, summer??autumn and winter were 3.36%??146/4341 cases????6.92%??295/4261 cases????6.88%??287/4172 cases?? and 3.50%??145/4139 cases????respectively. The HBoV detection rate in summer and autumn was significantly higher than that in spring and winter??χ2??93.801??P??0.01??. Conclusions??The HBoV detection rate in children with respiratory tract diseases is 5.16% in Suzhou area from Jan. 2009 to Dec. 2016. The highest HBoV detection rate is high in infant??especially in boys. Epidemical seasons of HBoV infection in Suzhou are summer and autumn.     

人博卡病毒与儿童呼吸道感染和腹泻病临床相关性的前瞻性病例对照研究

目的 通过前瞻性的病例对照研究探讨人博卡病毒(human bocavirus,HBOV)对于儿童急性呼吸道感染以及腹泻病的临床致病意义.方法 2008年10至12月,我们采集了436份急性下呼吸道感染住院患儿和150份术后患儿的鼻咽分泌物标本.同期,收集220例因急性腹泻在我院门诊就诊的患儿和200例无腹泻症状儿童的粪便标本.HBOV检测采用荧光定量多聚酶链反应方法.结果 HBOV在436份呼吸道感染患儿的鼻咽分泌物中阳性检出率10.3%(45/436),而无呼吸道感染儿童的鼻咽分泌物标本中阳性率仅0.7%(1/150),2组HBOV检出率差异有统计学意义(x2=14.356,P<0.001).HBOV与其他呼吸道病毒及肺炎支原体混合感染率为44.7%(20/45).呼吸道HBOV感染患儿的年龄为1.3～72个月[平均(18.3±13.6)个月].HBOV在腹泻组粪便中检出率为2.7%(6/220),在无腹泻症状组粪便中检出率为2%(4/200),2组HBOV阳性率差异无统计学意义(P>0.05).6例HBOV阳性的腹泻患儿中,5例同时合并轮状病毒感染.粪便中HBOV阳性的患儿都在4岁以下.结论 HBOV呼吸道感染通常见于婴幼儿.本研究支持HBOV与儿童时期的急性下呼吸道感染有关,但是HBOV对儿童腹泻的致病性未能确定.     

长春地区儿童急性呼吸道感染人博卡病毒检测及分析

急性呼吸道感染(ARI)是引起儿童发病和死亡的常见原因[1].2008年1-3月,我们对我院691例ARI患儿鼻咽分泌物进行人博卡病毒(HBoV)检测,报道如下.     

90例儿童人博卡病毒感染临床分析

目的：探讨儿童人博卡病毒（HBoV）感染的临床特征。方法：采集843例下呼吸道感染患儿鼻、咽拭子标本,用多重RT-PCR方法检测HBoV和其他6种常见呼吸道病毒,分析HBoV阳性病例临床特征。结果：843例标本中检测出HBoV阳性90例（10.7%）,呼吸道合胞病毒（RSV）131例（15.5%）,流感病毒（IFV）117例（13.9%）,副流感病毒(PIV)84例（10.0%）,鼻病毒(RV)55例（6.5%）,冠状病毒(OC43)48例（5.7%）,人类偏肺病毒(HMPV)33例（3.7%）。HBoV合并其他呼吸道感染者45例（50%）,其中HBoV合并１种其他病毒感染者33例（37％）,合并2种其他病毒感染者11例（12％）,合并3种其他病毒感染者1例（1％）。伴喘息的患儿HBoV检出率高于不伴喘息的患儿（17.0% vs 9.2%,P<0.01）。HBoV阳性患儿常见的临床表现为频咳、喘息和发热。HBoV阳性组与RSV阳性组中喘息发生的构成比差异无统计学意义。结论：伴喘息发作的下呼吸道感染患儿中,HboV阳性检出率明显高于不伴喘息发作患儿,提示HBoV可能是除RSV外另一种引起儿童喘息的呼吸道病毒。HBoV与其他呼吸道病毒存在着混合感染。