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Distribution of Avian Influenza A Viruses in Poultry-Related Environment and Its Association with Human Infection in Henan, 2016 to 2017 被引量:2
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作者 MA Hong Xia WANG Ruo Lin +9 位作者 NIE Yi Fei SU Jia LI Dong Xiao LI Yi DU Yan Hua WEI Hai Yan LI Xing Le WANG Zhe XU Bian Li HUANG Xue Yong 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2019年第11期797-803,共7页
Objective To survey avian influenza A viruses(AIVs) in the environment and explore the reasons for the surge in human H7 N9 cases.Methods A total of 1,045 samples were collected from routine surveillance on poultry-re... Objective To survey avian influenza A viruses(AIVs) in the environment and explore the reasons for the surge in human H7 N9 cases.Methods A total of 1,045 samples were collected from routine surveillance on poultry-related environments and 307 samples from human H7 N9 cases-exposed environments in Henan from 2016 to2017. The nucleic acids of influenza A(Flu A), H5, H7, and H9 subtypes were detected by real-time polymerase chain reaction.Results A total of 27 H7 N9 cases were confirmed in Henan from 2016 to 2017, 24 had a history of live poultry exposure, and 15 had H7 N9 virus detected in the related live poultry markets(LPMs). About 96%(264/275) Flu A positive-environmental samples were from LPMs. H9 was the main AIV subtype(10.05%) from routine surveillance sites with only 1 H7-positive sample, whereas 21.17% samples were H7-positive in H7 N9 cases-exposed environments. Samples from H7 N9 cases-exposed LPMs(47.56%)had much higher AIVs positive rates than those from routine surveillance sites(12.34%). The H7+H9 combination of mixed infection was 78.18%(43/55) of H7-positive samples and 41.34%(43/104) of H9-positive samples.Conclusion The contamination status of AIVs in poultry-related environments is closely associated with the incidence of human infection caused by AIVs. Therefore, systematic surveillance of AIVs in LPMs in China is essential for the detection of novel reassortant viruses and their potential for interspecies transmission. 展开更多
关键词 avian influenza virus human H7N9 cases Live poultry market Routine surveillance Exposure environments
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Multiplication of the Recombinant Strain Re-7 of Avian Influenza Virus Subtype H5 in MDCK Cells
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作者 Chen Hong Wang Bo +6 位作者 Zhao Haiyuan Li Jinxiang Zhao Bo Li Li Wang Yuhong Cui Kai Zhu Changdong 《Animal Husbandry and Feed Science》 CAS 2018年第3期178-180,共3页
This study was conducted to explore the multiplication pattern of the recombinant strain Re-7 of avian influenza virus subtype H5 in Madin Darby Canine Kidney (MDCK) cells and to determine the optimal multiplicity o... This study was conducted to explore the multiplication pattern of the recombinant strain Re-7 of avian influenza virus subtype H5 in Madin Darby Canine Kidney (MDCK) cells and to determine the optimal multiplicity of infection (MOI) and the optimal time for virus harvest. The recombinant strain Re-7 was inoculated at different MOIs into MDCK cells grown in serum-free medium in 100 L bioreactors for replication. Then, the hemagglutination(HA) titer, 50% tissue culture infectious dose (TCID50) and 50% embryo infectious dose (EID50) of culture medium were measured once every 12 h from 24 h after virus inoculation to determine the optimal MOI. After that, virus was inoculated at the optimal MOI determined above into MDCK cells for large-scale virus replication to determine the optimal time for virus harvest. The results showed that the optimal MOI was 10 2, and the optimal time for virus harvest was 60 h after inoculation. Under these conditions, the HA titer, TCIDso per 1 mL and EIDso per 0.1 mL were increased to 1:102 4, 10^7.33 and 10^6.83, respectively. This study provides relatively stable parameters for large-scale production of the recombinant strain Re-7 of avian influenza virus subtype H5. 展开更多
关键词 avian influenza virus Recombinant strain MDCK cells Suspension culture Optimal multiplicity of infection (MOI) Harvest time
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Variation and evolution of NP genes of human avian H_5N_1 virus strains
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作者 PING HUANG CHANG WEN KE HUI LI LI RONG ZOU LING FANG QIU XIA CHEN YAN LING MO FENG DENG 《Journal of Microbiology and Immunology》 2007年第1期40-45,共6页
In order to reveal variation and revolution of NP genes of human avian H5 N1 influenza virus strains, the NP gene of a human avian H5 N1 influenza virus strain in Guangdong was sequenced and the global NP genes of str... In order to reveal variation and revolution of NP genes of human avian H5 N1 influenza virus strains, the NP gene of a human avian H5 N1 influenza virus strain in Guangdong was sequenced and the global NP genes of strains were retrieved. The sequences were analyzed by DNAStar 5.0, and the evolutionary speed was studied with reference to the epidemiological data. It was found that NP genes of 45 strains during 1997-2006 were homologically classified into three groups: strains in 1997-1998, strains in 2004-2005 and strains from 2003 to 2006. There were 35 substitutions in NPs in all strains accounting for a ratio of 7.03% (35/498). An additional glycoprotein domain (NGT430-432) was found in NP genes in the strains of 2003-2006, the mutation of N370S in GD-01-06 resulted in occurrence of one more glycoprotein domain (NES368-370). In the synonymous variation, Ks values in NP were 2.03 × 10^-5-2.55 × 10^-5 Nt/d and K. values in NP were 1.58 × 10^-6-3.10 × 10^-6 Nt/d. There didn't exist obviously selective pressure. An additional glycoprotein domain in every strain of 2003-2006 and one more in strain GD-01-06 might change the antigenicity of human avian H5 N1 influenza virus. The variation on human avian H5 N1 influenza strains occurred frequently in the natural world, which would result in high probability of human-human transmission along with the natural evolution of the virus. 展开更多
关键词 human avian influenza H5 N1 virus NP gene Evolution
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Clinical characteristics of human infection with a novel avian-origin influenza A(H10N8) virus 被引量:13
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作者 Zhang Wei Wan Jianguo +13 位作者 Qian Kejian Liu Xiaoqing Xiao Zuke Sun Jian Zeng Zhenguo Wang Qi Zhang Jinxiang Jiang Guanghui Nie Cheng Jiang Rong Ding Chengzhi Li Ran Horby Peter Gao Zhancheng 《Chinese Medical Journal》 SCIE CAS CSCD 2014年第18期3238-3242,共5页
Background Novel influenza A viruses of avian-origin may be the precursors of pandemic strains. This descriptive study aims to introduce a novel avian-origin influenza A (H10N8) virus which can infect humans and cau... Background Novel influenza A viruses of avian-origin may be the precursors of pandemic strains. This descriptive study aims to introduce a novel avian-origin influenza A (H10N8) virus which can infect humans and cause severe diseases. Methods Collecting clinical data of three cases of human infection with a novel reassortment avian influenza A (H10N8) virus in Nanchang, Jiangxi Province, China. Results Three cases of human infection with a new reassortment avian influenza A(H10N8) virus were described, of which two were fatal cases, and one was severe case. These cases presented with severe pneumonia that progressed to acute respiratory distress syndrome (ARDS) and intractable respiratory failure. Conclusion This novel reassortment avian influenza A (H10N8) virus in China resulted in fatal human infections, and should be added to concerns in clinical practice. 展开更多
关键词 human infection avian influenza A(H10N8) virus REASSORTMENT clinical characteristics
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Severe human infection with a novel avian-origin influenza A(H7N4) virus 被引量:6
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作者 Xiang Huo Lun-biao Cui +18 位作者 Cong Chen Dayan Wang Xian Qi Ming-hao Zhou Xiling Guo Fengming Wang William J. Liu Weirong Kong Daxin Ni Ying Chi Yiyue Ge Haodi Huang Feifei Hu Chao Li Xiang Zhao Ruiqi Ren Chang-jun Bao George F. Gao Feng-Cai Zhu 《Science Bulletin》 SCIE EI CSCD 2018年第16期1043-1050,共8页
Human infections with influenza H7 subtypes, such as H7Ng, have raised concerns worldwide. Here, we report a human infection with a novel influenza A(HTN4) virus. A 68 years-old woman with cardiovascular and cholecy... Human infections with influenza H7 subtypes, such as H7Ng, have raised concerns worldwide. Here, we report a human infection with a novel influenza A(HTN4) virus. A 68 years-old woman with cardiovascular and cholecystic comorbidities developed rapidly progressed pneumonia with influenza-like-illness as initial symptom, recovered after 23 days-hospitalization including 8 days in ICLI. Laboratory indicators for liver and blood coagulation dysfunction were observed. Oseltamivir phosphate, glucocorticoids and antibiotics were jointly implemented, with nasal catheterization of oxygen inhalation for this patient. We obtained the medical records and collected serial respiratory and blood specimens from her. We col- lected throat, cloacal and/or feces samples of poultry and wild birds from the patient's backyard, neigh- borhood, local live poultry markets (LPMs) and the nearest lake. All close contacts of the patient were followed up and sampled with throat swabs and sera. Influenza viruses and other respiratory pathogens were tested by real-time RT-PCR, viral culturing and/or sequencing for human respiratory and bird sam- ples. Micro-neutralizing assay was performed for sera. A novel reassortant wild bird-origin H7N4 virus is identified from the patient and her backyard poultry (chickens and ducks) by sequencing, which is dis- tinct from previously-reported avian H7N4 and H7N9 viruses. At least four folds increase of neutralizing antibodies to H7N4 was detected in her convalescent sera. No samples from close contacts, wild birds or other poultry were tested positive for H7N4 by real-time RT-PCR. 展开更多
关键词 avian influenza virus (AIV) human infection HTN4 EPIDEMIOLOGY PNEUMONIA
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First outbreak of human infection with avian influenza A(H7N9) virus in Guangxi, China, 2016 to 2017 被引量:1
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作者 Jing Wang Li-Na Jiang +5 位作者 Chuan-Yi Ning Yi-Ping Yang Min Chen Chao Zhang Wei-Tao He Yi Tan 《Chinese Medical Journal》 SCIE CAS CSCD 2019年第16期1995-1997,共3页
To the Editor: Since avian influenza A(H7N9) was first identified in Shanghai, China, in March 2013, there have been a total of five epidemics. These have amounted to 1564 laboratory-confirmed cases up to September 20... To the Editor: Since avian influenza A(H7N9) was first identified in Shanghai, China, in March 2013, there have been a total of five epidemics. These have amounted to 1564 laboratory-confirmed cases up to September 2017, with a fatality rate of about 40%.[1] In the fifth wave, 4.09% of cases (31/758) were infected with the highly pathogenic avian influenza (HPAI) A(H7N9). This indicated that the pathotype of the A(H7N9) had switched from low pathogenic avian influenza (LPAI) to HPAI. 展开更多
关键词 avian influenza A H7N9 human infection
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Case report for human infection with a highly pathogenic avian influenza A(H5N6) virus in Beijing, China 2019 被引量:1
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作者 Yang Lei Zhao Xiang +4 位作者 Li Xiyan Bo Hong Li Duo Liu Jia Wang Dayan 《Biosafety and Health》 2020年第1期49-52,共4页
Bird infections with highly pathogenic avian influenza A(H5N6) viruses have been identified since 2014. With very limited occasion, the virus could sporadically spilled over to infect humans. It has been recognized th... Bird infections with highly pathogenic avian influenza A(H5N6) viruses have been identified since 2014. With very limited occasion, the virus could sporadically spilled over to infect humans. It has been recognized that all human infections were within southern region of China's Mainland until the case reported here in Beijing in Aug. 2019. This was the first human case infected with highly pathogenic avian influenza A(H5N6) virus in northern China. The infection was confirmed by real-time RT-PCR assay. The whole genome sequences were obtained from clinical sample. Genetic characteristics of the virus were identified similar to those of previous avian influenza A(H5N6) viruses, retaining the main features of the avian influenza virus. 展开更多
关键词 Highly pathogenic avian influenza H5N6 human infection
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Human avian influenza A (H5N1) virus infection in China 被引量:14
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作者 XU CuiLin, DONG LiBo, XIN Li, LAN Yu, CHEN YongKun, YANG LiMei & SHU YueLong State Key Laboratory for Viral Genetic and Engineering, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing 100052, China 《Science China(Life Sciences)》 SCIE CAS 2009年第5期407-411,共5页
Highly pathogenic influenza A (H5N1) virus causes a widespread poultry deaths worldwide. The first human H5N1 infected case was reported in Hong Kong Special Administrative Region of China in 1997. Since then, the vir... Highly pathogenic influenza A (H5N1) virus causes a widespread poultry deaths worldwide. The first human H5N1 infected case was reported in Hong Kong Special Administrative Region of China in 1997. Since then, the virus re-emerged in 2003 and continues to infect people worldwide. Currently, over 400 human infections have been reported in more than 15 countries and mortality rate is greater than 60%. H5N1 viruses still pose a potential pandemic threat in the future because of the continuing global spread and evolution. Here, we summarize the epidemiological, clinical and virological characteristics of human H5N1 infection in China monitored and identified by our national surveillance systems. 展开更多
关键词 avian influenza H5N1 virus human infection China
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2019-2022年中国H6N1亚型禽流感病毒的生物学特性分析
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作者 陈源 崔鹏飞 +9 位作者 施建忠 张元成 于晴晴 颜成 张亚萍 王丛丛 张洁 王燕 邓国华 陈化兰 《中国农业科学》 CAS CSCD 北大核心 2024年第9期1820-1832,共13页
【背景】H6亚型禽流感病毒(avian influenza virus,AIV)广泛流行于我国南方地区,是我国家禽中最常见AIV之一。H6N1亚型AIV频繁地与其他野鸟源毒株重配,并且可以作为供体为高致病性AIV提供内部基因片段,产生新型重组病毒,进而威胁人类健... 【背景】H6亚型禽流感病毒(avian influenza virus,AIV)广泛流行于我国南方地区,是我国家禽中最常见AIV之一。H6N1亚型AIV频繁地与其他野鸟源毒株重配,并且可以作为供体为高致病性AIV提供内部基因片段,产生新型重组病毒,进而威胁人类健康。【目的】通过对我国H6N1亚型AIV的演化动态及其相关生物学特性分析研究,为我国禽流感的综合防控提供数据支持。【方法】采集2019—2022年我国25个省(直辖市、自治区)的活禽交易市场及养殖场家禽喉和泄殖腔拭子,通过接种鸡胚分离到7株H6N1亚型AIVs并对其进行全基因组测序,分析其遗传演化特征、受体结合特性及其对SPF鸡和BALB/c小鼠的感染性。【结果】遗传演化分析表明,7株病毒的基因与分离于北美及东南亚地区的野鸟源病毒基因同源性较高,基因来源复杂,具有明显的遗传多样性。贝叶斯演化分析表明,H6亚型AIV HA基因曾发生过多次的跨洲际传播,欧亚谱系病毒在北美地区也有着较长时间流行。1株病毒HA基因与北美地区毒株基因高度同源,根据贝叶斯演化分析结果,推测该病毒在野鸟体内经历了复杂的基因重配后形成,后经野鸟传入我国。特殊氨基酸位点分析结果显示,病毒HA蛋白裂解位点序列均为PQIETR↓GLF,符合低致病性AIV特征;此外,另有1株病毒的NP蛋白发生Y52H突变,据报道,该突变对AIV获得抵抗人干扰素刺激基因BTN3A3的能力起到关键作用。受体结合特性分析表明,部分毒株具有双受体结合特性,但结合人源受体能力弱于结合禽源受体能力。病毒对SPF鸡的感染性试验表明,鸡感染A/chicken/Jiangxi/S40445/2019(H6N1)后能通过呼吸道及消化道排毒,并且病毒可在鸡群内通过接触传播。鸡感染A/duck/Jiangxi/S10941/2019(H6N1)后仅有少数鸡通过呼吸道排毒,病毒无法在鸡群间通过接触传播。BALB/c小鼠的感染性试验表明,H6N1亚型AIV无需提前适应便可在小鼠呼吸道内有效复制,但对小鼠仍呈低致病力。【结论】2019—2022年分离于我国的H6N1亚型AIV基因大部分来源于野鸟源病毒,候鸟可经东亚-澳大利亚迁徙路线将病毒传入我国;部分病毒能够结合人源唾液酸受体并在小鼠呼吸道内有效复制,表明该亚型病毒对公共卫生安全构成潜在威胁。 展开更多
关键词 H6N1 禽流感病毒 跨洲际传播 重配 感染性
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H9N2亚型禽流感病毒跨种间感染传播的风险分析
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作者 周婉婷 陈璐 +6 位作者 周淑宁 田杰 李晓奇 刘朔 彭程 蒋文明 刘华雷 《中国家禽》 北大核心 2024年第11期165-172,共8页
为深入了解H9N2亚型禽流感病毒的生物学特征,研究对1998年H9N2亚型禽流感病毒流行以来GenBank和GISAID中公开的哺乳动物感染数据进行归纳,对H9N2亚型禽流感病毒的感染和分布情况进行分析。结果显示:中国报告的H9N2亚型禽流感病毒感染人... 为深入了解H9N2亚型禽流感病毒的生物学特征,研究对1998年H9N2亚型禽流感病毒流行以来GenBank和GISAID中公开的哺乳动物感染数据进行归纳,对H9N2亚型禽流感病毒的感染和分布情况进行分析。结果显示:中国报告的H9N2亚型禽流感病毒感染人的病例数据最多,占87.21%,且呈增加趋势。中国的75例病例中,以湖北省报告的最多。非人类哺乳动物感染病例涉及10种哺乳动物,包括猪、水貂、貉、雪貂、犬、果子狸、蝙蝠、猫、马和鼠兔,均为陆生哺乳动物,其中有61.4%的感染病例属于猪源。数据库中的大多数H9N2亚型禽流感病毒均含有关键氨基酸位点突变。研究表明,H9N2亚型禽流感病毒跨种间感染传播的风险高,关键氨基酸位点易发生突变,监测H9N2亚型禽流感病毒在哺乳动物中的感染分布至关重要。 展开更多
关键词 H9N2 禽流感病毒 感染 监测
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天蚕素对H_(9)N_(2)亚型禽流感病毒和禽致病性大肠杆菌共感染肉鸡的干预作用
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作者 王许刚 卢佳慧 +5 位作者 袁佳欣 常伽翌 范雨欣 李龙飞 张瑞华 徐彤 《饲料研究》 CAS 北大核心 2024年第15期73-78,共6页
试验旨在探讨天蚕素对H_(9)N_(2)亚型禽流感病毒(AIV)与禽致病性大肠杆菌(APEC)共感染致炎性渗出的干预效果,为临床H_(9)N_(2)亚型AIV与APEC共感染的有效防治提供参考。试验选取150只14日龄白羽肉鸡,随机分为5组,每组3个重复,每个重复1... 试验旨在探讨天蚕素对H_(9)N_(2)亚型禽流感病毒(AIV)与禽致病性大肠杆菌(APEC)共感染致炎性渗出的干预效果,为临床H_(9)N_(2)亚型AIV与APEC共感染的有效防治提供参考。试验选取150只14日龄白羽肉鸡,随机分为5组,每组3个重复,每个重复10只鸡。对照组肉鸡使用无菌生理盐水0.2 mL滴鼻,APEC感染组肉鸡使用含2.09×109 CFU APEC O2菌株肉汤0.2 mL滴鼻,H_(9)N_(2)感染组肉鸡使用H_(9)N_(2)病毒尿囊液(约105 EID50 H_(9)N_(2)病毒)0.2 mL滴鼻,H_(9)N_(2)+APEC感染组肉鸡使用0.2 mL APEC O2菌株肉汤离心后的沉淀与0.2 mL H_(9)N_(2)病毒尿囊液混匀得到的病毒尿囊液滴鼻,H_(9)N_(2)+APEC干预组肉鸡采用与H_(9)N_(2)+APEC感染组相同处理后,使用天蚕素饮水(300 mg/kg)+基础饲粮饲喂,其余各组正常饮水+基础饲粮饲喂。正式试验期21 d。结果显示,H_(9)N_(2)+APEC感染组肉鸡临床症状极为明显,死亡率显著升高(P<0.05),气管和肺脏病变最为严重。与H_(9)N_(2)+APEC感染组相比,H_(9)N_(2)感染组和APEC感染组在感染后第3、7、14、21 d时的H_(9)N_(2)病毒拷贝数和APEC载量均显著降低(P<0.05);H_(9)N_(2)+APEC干预组在感染后第3、7、14、21 d时的H_(9)N_(2)病毒拷贝数均显著降低(P<0.05),H_(9)N_(2)+APEC干预组在感染后第7、14、21 d时的APEC载量均显著降低(P<0.05)。研究表明,天蚕素可以缓解H_(9)N_(2)亚型AIV、APEC以及两者共感染引起的肉鸡呼吸道症状,降低死亡率,其机制与天蚕素降低病原在组织内的载量及修复呼吸系统、改善呼吸机能有关。 展开更多
关键词 肉鸡 H_(9)N_(2)亚型禽流感病毒 禽致病性大肠杆菌 合并感染 天蚕素
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New light shed on global epidemiology of avian influenza A H5N1 virus infection in humans,1997—2015
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《Science Foundation in China》 CAS 2016年第4期51-51,共1页
With the support by the National Natural Science Foundation of China,the research team led by Prof.Yu Hongjie(余宏杰)at the School of Public Health,Fudan University,Key Laboratory of Public Health Safety,Ministry of E... With the support by the National Natural Science Foundation of China,the research team led by Prof.Yu Hongjie(余宏杰)at the School of Public Health,Fudan University,Key Laboratory of Public Health Safety,Ministry of Education,and the Key Laboratory of Surveillance and Early Warning on Infectious Disease,Chinese Center for Disease Control and Prevention,has published the paper entitled“Global epi- 展开更多
关键词 New light shed on global epidemiology of avian influenza A H5N1 virus infection in humans 1997 余宏
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H9N2亚型禽流感病毒感染鸡呼吸道应答模式研究
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作者 池周颖 李天旭 +6 位作者 吴亚鑫 瞿孝云 李思婕 孙敏华 张建峰 廖明 杜寿文 《中国畜牧兽医》 CAS CSCD 北大核心 2024年第9期3970-3979,共10页
【目的】通过建立H9N2亚型禽流感病毒(AIV)感染鸡上呼吸道炎症模型,探索其感染鸡上呼吸道引起的炎症反应。【方法】将H9N2亚型AIV流行毒株GD10142,按照100μL/只(108 EID 50/100μL)的剂量通过滴鼻点眼方法感染SPF鸡,并在感染后观察鸡... 【目的】通过建立H9N2亚型禽流感病毒(AIV)感染鸡上呼吸道炎症模型,探索其感染鸡上呼吸道引起的炎症反应。【方法】将H9N2亚型AIV流行毒株GD10142,按照100μL/只(108 EID 50/100μL)的剂量通过滴鼻点眼方法感染SPF鸡,并在感染后观察鸡的临床特征,采集感染后0、1、3、5、7、9 d的咽拭子和血清样品;感染后5和9 d剖检观察鸡的呼吸道和肺脏病理变化,收集气管灌洗液、气管和肺脏组织;通过实时荧光定量PCR检测咽拭子、气管灌洗液、气管和肺脏组织中的病毒载量;应用ELISA方法检测感染后血清总IgG和H9N2亚型AIV特异性IgG的变化规律,通过血清中和试验分析血清中和抗体的活性;通过ELISA方法检测血清和气管灌洗液中炎症相关细胞因子白细胞介素6(IL-6)、IL-10、IL-1β、肿瘤坏死因子α(TNF-α)和核转录因子κB(NF-κB)的水平。【结果】H9N2亚型AIV感染后鸡没有出现典型的临床特征,但感染后1~5 d在咽拭子中可检测到病毒核酸,且感染3 d后病毒载量最高,感染5 d后检测不到病毒核酸;感染5 d时,在气管灌洗液、气管和肺脏检测到病毒核酸,其中前两者载量高于肺脏;血清总IgG和H9N2亚型AIV特异性IgG在感染后3 d增多,感染后5~9 d维持较高水平,且具有较强的病毒中和活性;血清IL-10、IL-1β、TNF-α和NF-κB也在感染后3 d开始呈上升趋势;但气管灌洗液中IL-6、IL-10、IL-1β、TNF-α和NF-κB含量很低,且感染前后无明显变化。【结论】本研究成功建立了H9N2亚型AIV感染鸡呼吸道模型,确定上呼吸道是H9N2亚型AIV主要感染和增殖部位,H9N2亚型AIV感染诱导机体产生促炎和抑炎细胞因子,可能是感染动物维持免疫稳态的重要因素。本研究为深入探索H9N2亚型AIV的致病机制和宿主防御机制奠定了基础。 展开更多
关键词 H9N2亚型禽流感病毒 呼吸道感染 免疫应答 模型评价
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呼吸道合胞病毒、人偏肺病毒和流感病毒的感染特点分析及成人感染住院的相关因素分析
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作者 余梦娟 葛晓卫 刘雪莹 《罕少疾病杂志》 2024年第11期132-134,共3页
目的比较呼吸道合胞病毒(RSV)、人偏肺病毒(hMPV)和流感感染特点并分析成人感染住院的相关因素。方法收集2021年1月-2023年1月在流感/RSV/hMPV流行季节期间住院治疗的急性呼吸道感染的成年患者共202例,其中流感组104例,RSV组68例,MPV30... 目的比较呼吸道合胞病毒(RSV)、人偏肺病毒(hMPV)和流感感染特点并分析成人感染住院的相关因素。方法收集2021年1月-2023年1月在流感/RSV/hMPV流行季节期间住院治疗的急性呼吸道感染的成年患者共202例,其中流感组104例,RSV组68例,MPV30例。比较三组的临床感染特征,并使用Logistics回归分析成人感染住院的相关危险因素。结果与流感患者相比,RSV和hMPV患者有更多的潜在风险因素,包括年龄大于65岁,合并症如心脏疾病、肾脏疾病、COPD更多。RSV患者住院前出现症状的时间最长,住院时间最长,入住重症监护室的比例最高,住院期间接受氧气补充的概率更高。多因素Logistics回归分析显示年龄≥65岁(调整OR=3.19,95%CI=1.44~4.17,P=0.034)、合并慢性心脏疾病(调整OR=2.01,95%CI=1.98~5.42,P=0.012)、合并慢性肾脏疾病(调整OR=2.12,95%CI=1.45~4.34,P=0.001)、合并COPD(调整OR=2.26,95%CI=0.78~3.23,P=0.122)、重度COPD(调整OR=1.85,95%CI=1.21~2.93,P=0.016)、治疗时出现COPD加重(整调OR=1.87,95%CI=1.46~5.32,P=0.015)、出现败血症(调整OR=2.12,95%CI=0.93~4.87,P=0.001)为成人住院的危险因素。结论虽然流感的发病率更高,但在住院成人中,RSV和hMPV的潜在风险因素更多,住院时间更长,这表明需要采取有效的干预措施。与流感、RSV、hMPV成人患者住院相关的危险因素为年龄≥65岁,患者合并慢性心脏疾病、慢性肾脏疾病、重度COPD,治疗时COPD加重、出现败血症。 展开更多
关键词 呼吸道合胞病毒 人偏肺病毒 流感 成人呼吸道感染 住院危险因素分析
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Vaccination of poultry successfully eliminated human infection with H7N9 virus in China 被引量:41
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作者 Xianying Zeng Guobin Tian +3 位作者 Jianzhong Shi Guohua Deng Chengjun Li Hualan Chen 《Science China(Life Sciences)》 SCIE CAS CSCD 2018年第12期1465-1473,共9页
The H7 N9 viruses that emerged in China in 2013 were nonpathogenic in chickens but mutated to a highly pathogenic form in early 2017 and caused severe disease outbreaks in chickens. The H7 N9 influenza viruses have ca... The H7 N9 viruses that emerged in China in 2013 were nonpathogenic in chickens but mutated to a highly pathogenic form in early 2017 and caused severe disease outbreaks in chickens. The H7 N9 influenza viruses have caused five waves of human infection, with almost half of the total number of human cases(766 of 1,567) being reported in the fifth wave, raising concerns that even more human infections could occur in the sixth wave. In September 2017, an H5/H7 bivalent inactivated vaccine for chickens was introduced, and the H7 N9 virus isolation rate in poultry dropped by 93.3% after vaccination. More importantly,only three H7 N9 human cases were reported between October 1, 2017 and September 30, 2018, indicating that vaccination of poultry successfully eliminated human infection with H7 N9 virus. These facts emphasize that active control of animal disease is extremely important for zoonosis control and human health protection. 展开更多
关键词 H7N9 influenza virus evolution VACCINATION human infection ELIMINATION
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河南省首例人感染H5N6禽流感病例的流行病学及临床特征 被引量:4
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作者 聂轶飞 赵升 +8 位作者 朱琳 僧明华 杨凯朝 王海峰 徐瑾 马红霞 叶莹 黄学勇 郭万申 《郑州大学学报(医学版)》 CAS 北大核心 2023年第2期255-258,共4页
目的:分析河南省首例人感染H5N6禽流感病例的流行病学及临床特征。方法:2022年3月24日,河南省首次报告一例人感染H5N6禽流感确诊病例。参照《人感染动物源性流感预防控制技术指南(试行)》,疾控机构专业人员对病例开展现场流行病学调查,... 目的:分析河南省首例人感染H5N6禽流感病例的流行病学及临床特征。方法:2022年3月24日,河南省首次报告一例人感染H5N6禽流感确诊病例。参照《人感染动物源性流感预防控制技术指南(试行)》,疾控机构专业人员对病例开展现场流行病学调查,对涉及的工作场所、病例居住地以及禽类来源地等开展环境标本病原检测。结果:患者临床表现主要为高热、咳嗽、呼吸困难,后因呼吸衰竭死亡;病例有明确的禽肉相关暴露史,早期肺泡灌洗液、禽肉及工作场所环境标本H5N6禽流感病毒核酸均为阳性。结论:该例人感染H5N6禽流感病例通过职业暴露感染,未发现人传人的证据。 展开更多
关键词 人感染禽流感 H5N6 流行病学特征 河南省
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自噬在H9N2亚型禽流感病毒和大肠杆菌共感染中的作用研究 被引量:2
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作者 蒋作仪 李丽 +4 位作者 李茵婧 常丽凤 辛震东 平继辉 苏娟 《畜牧与兽医》 CAS 北大核心 2023年第2期91-102,共12页
为探究H9N2亚型禽流感病毒(AIV)和大肠杆菌共感染对无特定病原体(SPF)鸡肺组织和免疫系统的损伤及细胞自噬在共感染致病过程中的作用,选用60只3周龄SPF鸡,随机平均分为对照组、单独细菌感染组、单独病毒感染组、先病毒后细菌共感染组和... 为探究H9N2亚型禽流感病毒(AIV)和大肠杆菌共感染对无特定病原体(SPF)鸡肺组织和免疫系统的损伤及细胞自噬在共感染致病过程中的作用,选用60只3周龄SPF鸡,随机平均分为对照组、单独细菌感染组、单独病毒感染组、先病毒后细菌共感染组和先细菌后病毒共感染组5组。于处理后第1、3、5和7天各组随机选择3只鸡采集血清和肺组织,利用荧光定量PCR和HE组织学染色技术探究共感染对SPF鸡的肺组织系数、肺组织病理变化和肺组织屏障功能的影响。利用细胞培养、荧光定量PCR、酶联免疫吸附和Western blot等技术探究共感染与细胞自噬的关系以及自噬对共感染炎症反应和辅助性T细胞17(Th17)免疫反应的影响。结果显示:先病毒后细菌共感染试验组导致鸡肺组织病理损伤严重;共感染诱导强烈的细胞自噬,先病毒后细菌组自噬相关因子(LC3、Beclin-1)的蛋白表达水平与其他组相比极显著升高(P<0.01);同时与其他组相比,先病毒后细菌组炎症因子基因表达水平极显著升高(P<0.01),Th17免疫相关因子基因表达水平极显著降低(P<0.01)。提示:自噬通过促进共感染中炎性因子释放且抑制Th17免疫反应,造成鸡肺组织严重损伤。本试验为研究病毒与细菌共感染机制提供了科学依据。 展开更多
关键词 H9N2亚型禽流感病毒 共感染 自噬 炎症因子 Th17免疫
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1株野鸟源H7N3亚型禽流感病毒的全基因组序列分析及其对小鼠感染性研究
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作者 吴恬恬 尹馨 +7 位作者 梁少波 李金平 朱峻锋 刘朔 彭程 刘华雷 蒋文明 韩克光 《畜牧与兽医》 CAS 北大核心 2023年第2期56-61,共6页
旨在对2021年分离自我国宁夏回族自治区野鸟粪便中的1株低致病性H7N3禽流感病毒(AIV)A/mallard/Ningxia/Y37/2021(H7N3)株进行了全基因组测序、遗传进化分析及对小鼠致病性试验。全基因组序列分析表明,HA基因裂解位点仅有1个碱性氨基酸... 旨在对2021年分离自我国宁夏回族自治区野鸟粪便中的1株低致病性H7N3禽流感病毒(AIV)A/mallard/Ningxia/Y37/2021(H7N3)株进行了全基因组测序、遗传进化分析及对小鼠致病性试验。全基因组序列分析表明,HA基因裂解位点仅有1个碱性氨基酸,符合低致病性AIV的分子特性。遗传进化分析结果表明,HA基因和韩国野鸭源H7N7亚型AIV同源性较高;NA基因与韩国野鸟源H5N3亚型AIV同源性较高;PB2、PA基因与H5N2亚型AIV有较高的同源性;PB1基因与H5N3亚型AIV有较高的同源性;NP基因与H3N2亚型有较高同源性;M、NS基因与H3N8亚型有较高同源性,具有明显的遗传多样性。血凝抑制(HI)试验结果表明,该毒株与H7N9-Re4疫苗株抗血清的HI效价比同源毒株低16倍,抗原性差异显著。小鼠感染性试验结果显示,该病毒能在小鼠的肺部与鼻甲中复制,并引起感染小鼠体重下降,表明该毒株有感染哺乳动物的风险。本试验通过对1株野鸟源H7N3亚型AIV部分生物学特性的分析,为H7N3亚型禽流感的预警和综合防控提供重要理论参考。 展开更多
关键词 禽流感病毒 H7N3 遗传演化 抗原性 感染性
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Isolation and characterization of H7N9 viruses from live poultry markets--Implication of the source of current H7N9 infection in humans 被引量:89
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作者 SHI JianZhong DENG GuoHua +14 位作者 LIU PeiHong ZHOU JinPing GUAN LiZheng LI WenHui LI XuYong GUO Jing WANG GuoJun FAN Jun WANG JinLiang LI YuanYuan JIANG YongPing LIU LiLing TIAN GuoBin LI ChengJun CHEN HuaLan 《Chinese Science Bulletin》 SCIE EI CAS 2013年第16期1857-1863,共7页
On March 31, 2013, the National Health and Family Planning Commission announced that human infections with a previously undescribed influenza A (H7N9) virus had occurred in Shanghai and Anhui Province, China. To inves... On March 31, 2013, the National Health and Family Planning Commission announced that human infections with a previously undescribed influenza A (H7N9) virus had occurred in Shanghai and Anhui Province, China. To investigate the possible origins of the H7N9 viruses causing these human infections, we collected 970 samples, including drinking water, soil, and cloacal and tracheal swabs of poultry from live poultry markets and poultry farms in Shanghai and Anhui Province. Twenty samples were positive for the H7N9 influenza virus. Notably, all 20 viruses were isolated from samples collected from live poultry markets in Shanghai. Phylogenetic analyses showed that the six internal genes of these novel human H7N9 viruses were derived from avian H9N2 viruses, but the ancestor of their HA and NA genes is uncertain. When we examined the phylogenetic relationship between the H7N9 isolates from live poultry markets and the viruses that caused the human infections, we found that they shared high homology across all eight gene segments. We thus identified the direct avian origin of the H7N9 influenza viruses that caused the human infections. Importantly, we observed that the H7N9 viruses isolated from humans had acquired critical mutations that made them more "human-like". It is therefore imperative to take strong measures to control the spread of H7N9 viruses in birds and humans to prevent further threats to human health. 展开更多
关键词 流感病毒 人类感染 市场 活禽 分离 感染源 鉴定 蕴涵
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实验性鸡大肠杆菌病病理学动态变化 被引量:12
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作者 石火英 高崧 +6 位作者 王宝安 许益民 张如宽 朱坤熹 焦新安 陈义平 吴力力 《畜牧兽医学报》 CAS CSCD 北大核心 2002年第5期508-512,共5页
用致病性大肠杆菌O18分离株和 /或低致病性禽流感病毒 (Mildlypathogenicavianinfluenzavirus,MPAIV)接种 10~ 12日龄SPF鸡。在接种后 1~ 96h进行临床症状与大体病理变化、组织学观察发现 :大肠杆菌接种组、MPAIV接种组和健康接种组... 用致病性大肠杆菌O18分离株和 /或低致病性禽流感病毒 (Mildlypathogenicavianinfluenzavirus,MPAIV)接种 10~ 12日龄SPF鸡。在接种后 1~ 96h进行临床症状与大体病理变化、组织学观察发现 :大肠杆菌接种组、MPAIV接种组和健康接种组除扑杀鸡外未见鸡死亡 ,MPAIV与大肠杆菌混合接种组除扑杀鸡外死亡率为 2 4%。混合接种组的病变比大肠杆菌接种组出现的时间早 ,恢复也慢 ,各脏器的病理变化更严重。MPAIV主要引起各实质器官的坏死。结果表明 ,大肠杆菌经气管内接种后试验鸡主要表现为呼吸道的炎症反应 ;MPAIV可使鸡大肠杆菌病严重化。 展开更多
关键词 大肠杆菌病 低致病性禽流感病毒 混合感染 病理变化
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