猪流感病毒山东分离株H1N1亚型HA基因的克隆与序列分析     

张太翔  凌宗帅  刘文鹏  徐彪  梁成珠  朱来华  孙军  王洪兵 《中国畜牧兽医》2010,37(12):77-81

采用RT-PCR技术对分离的H1N1亚型猪流感病毒的HA基因进行了扩增,将获得的PCR产物与pMD18-T载体连接,进行序列测定。同源性分析结果表明,分离毒株与其他H1N1亚型猪流感病毒的HA基因核苷酸同源性为70.7%～90.8%,与A/swine/Zhejiang/1/2007的同源性最高,与其他毒株的同源性相对较低。系统进化树分析结果表明,山东分离株的HA基因与欧洲谱系猪流感病毒进化关系最近,证明该分离株可能来源于北美谱系和欧亚谱系猪流感病毒的重组。  相似文献   

乌兰察布市泌乳奶牛亚临床酮病的调查研究     

王志刚  董利云  杨俊芳 《畜牧与饲料科学》2010,31(1):98-100

试验选取内蒙古乌兰察布市489头泌乳奶牛,通过对尿中和乳中酮体采用酮粉法检测进行奶牛亚临床酮病的监测与分析。结果表明,乌兰察布市泌乳奶牛亚临床酮病发病率为10.63%;第1和第2个泌乳月亚临床酮病发病率明显高于第3个及以上泌乳月;各胎次亚临床酮病发病率以3～5胎最高;日产奶量在30kg以上亚临床酮病发病率显著高于日产奶量在30kg以下奶牛;养殖小区以及规模户饲养奶牛的亚临床酮病发生率较高。  相似文献   

猪繁殖与呼吸综合征病毒FJ07A株的分离及其结构蛋白基因的序列分析   总被引：1，自引：0，他引：1  

王隆柏  庄向生  魏宏  车勇良  陈如敬  吴学敏  周伦江 《福建农业学报》2010,25(6)

从福建某猪场发生疑似"高热病"死亡的小猪病料中分离到1株病毒,该病毒在Marc-145细胞上增殖致细胞病变。对分离病毒的TCID50、动物回归试验、RT-PCR鉴定及对病毒株的结构蛋白基因进行了测定与分析。结果表明:分离毒株为美洲型猪繁殖与呼吸综合征病毒(命名为PRRSV-FJ07A),TCID50为10-6.5.mL-1,对35日仔猪具有致病性,结构蛋白基因与美洲型代表株VR-2332核苷酸同源性为89.2%～95.8%,氨基酸同源性为88.1%～96.2%;与国内PRRSV-HUN4株的核苷酸同源性为90.1%～99.7%,氨基酸同源性为88.3%～100.0%;与欧洲代表株LV的核苷酸同源性为63.7%～70.0%,氨基酸同源性为59.6%～78.9%。PRRSV-FJ07A序列已登陆Genbank,登录号为GI:283100314。  相似文献   

猪瘟胶体金快速诊断试纸条的研制   总被引：4，自引：0，他引：4  

杨明  陈伯祥  孙晓林  郭慧琳  贺奋义  常亮  豆林涛 《甘肃农业大学学报》2010,45(2)

采用柠檬酸钠还原法制备胶体颗粒,用猪瘟(CSF)抗体标记纯化,并包被在玻璃纤维膜上,另外将纯化的CSF抗体和羊抗鼠抗体包被在硝酸纤维膜上,组装成CSF快速检测条,对猪瘟病毒进行检测.结果表明:使用所研制的CSF快速检测条检测收集的70份待检样品,共检出猪瘟阳性病例26例,而经病毒分离鉴定阳性病例有28例,阳性符合率达92.8%;将5份阳性猪瘟病毒稀释后用试纸条和ELISA方法进行敏感性实验,结果表明,诊断试纸条的敏感性较高,用试纸条对鸽新城疫病毒、鸡减蛋综合症病毒、猪传染性胃肠炎病毒、猪繁殖与呼吸障碍综合症病毒进行检测,无交叉反应.  相似文献   

2009年隆安县春防猪瘟抗体水平监测   总被引：2，自引：1，他引：1  

李常挺  牛金涛  彭群明  李骊  杨威 《广西农业科学》2010,41(1):74-76

为掌握春季猪瘟集中免疫效果,于2009年4月随机采集了隆安县部分猪血清,以正向间接血凝方法（HA）检测猪瘟免疫抗体,结果表明,隆安县各乡镇散养猪的猪瘟免疫抗体水平不均衡,免疫效果差距明显,而规模猪场依然存在疫情隐患;猪瘟免疫抗体效价分布出现2个极端,抗体效价≤1：2的占26．8％,1：256的占25．1％,整体免疫效果较差。并通过分析免疫质量不佳的原因,对今后提高猪瘟免疫抗体水平的应对措施进行探讨,为有效防制猪瘟发生与流行提供参考。  相似文献   

猪肺炎支原体PCR检测方法的建立及初步临床应用     

张红云  梁晶晶  李回  孟先明  潘艳  冯励  罗廷荣 《广西农业科学》2010,41(3):256-258

根据GenBank中猪肺炎支原体（Mhp）J株P36蛋白基因（登录号X67286）的核苷酸序列设计1对引物,建立了快速检测Mhp的PCR方法。该方法能扩增出948bp的Mhp特异性条带,其敏感性达到可检测出0．735ng的MhpDNA,但对鸡毒支原体、猪伪狂犬病毒、猪圆环病毒、猪流感病毒、猪呼吸与繁殖综合征病毒均未检测出相应目的条带;将克隆获得的目的片段与GenBank已发表的MhpJ株的P36基因进行比较,同源性达到99．9％。采用所建立的PCR方法对42份疑似猪支原体肺炎（MPS）病料进行临床诊断,发现有13份呈阳性（31．0％）。可见,该PCR方法适合于MPS的临床诊断,可为其防控提供可靠依据。  相似文献   

Quantitative trait loci for leg weakness traits in a Landrace purebred population     

Yoshinobu UEMOTO  Shuji SATO  Chika OHNISHI  Kensuke HIROSE  Kenji KAMEYAMA  Kazuo FUKAWA  Osamu KUDO  Eiji KOBAYASHI 《Animal Science Journal》2010,81(1):28-33

Leg weakness in pigs is a serious problem in the pig industry. We performed a whole genome quantitative trait locus (QTL) analysis to find QTLs affecting leg weakness traits in the Landrace population. Half-sib progeny ( n  = 522) with five sires were measured for leg weakness traits. Whole genome QTL mapping was performed using a half-sib regression-based method using 190 microsatellite markers. No experiment-wide significant QTLs affecting leg weakness traits were detected. However, at the 5% chromosome-wide level, QTLs affecting leg weakness traits were detected on chromosomes 1, 3, 10 and 11 with QTL effects ranging from 0.07 to 0.11 of the phenotypic variance. At the 1% chromosome-wide level, QTLs affecting rear feet score and total leg score were detected on chromosomes 2 and 3 with QTL effects of 0.11 and 0.13 of the phenotypic variance, respectively. On chromosome 3 and 10, some QTLs found in this study were located at nearby positions. The present study is one of the first reports of QTLs affecting fitness related traits such as leg weakness traits, that segregate within the Landrace population. The study also provides useful information for studying QTLs in purebred populations.  相似文献   

Serological Surveillance of Influenza A Virus Infection in Swine Populations in Fujian Province,China: No Evidence of Naturally Occurring H5N1 Infection in Pigs     

X.‐H. Song  H. Xiao  Y. Huang  G. Fu  B. Jiang  Y. Kitamura  W. Liu  D. Liu  G. F. Gao 《Zoonoses and public health》2010,57(4):291-298

Several highly pathogenic H5N1 avian influenza viruses were isolated from swine populations in Fujian Province, China, since 2001. Because it is thought that H5N1 infection in pigs might result in virus adaptation to humans, we surveyed swine populations in Fujian Province in 2004 and 2007 for serological evidence of the infection. Twenty‐five pig farms covering all nine administrative districts of Fujian Province were sampled and a total of 1407 serum specimens were collected. The haemagglutination inhibition (HI) tests revealed no evidence of H5 infection and only a few cases of H9 infection. The negative results for H5 infection were further verified by micro‐neutralization tests. By contrast, H1 influenza virus infections were prevalent in swine in both surveys according to the results of enzyme‐linked immunosorbent assay (ELISA). The H3 infection rate was reduced dramatically in 2007 compared with 2004, when examined by HI and ELISA. In summary, the results imply that the swine populations in Fujian Province had not been affected greatly by the H5N1 avian influenza virus, given that there is no serological evidence that H5N1 influenza virus has infected the pig populations. The reported isolates represent only sporadic cases.  相似文献   

猪流感病毒的分离及NA基因的遗传进化分析   总被引：1，自引：1，他引：0  

侯韶毅  冯建远  高永锐  卢桂娟  陆有飞  肖爱欢  张民秀  卢冰霞  黄伟坚  赵武 《中国畜牧兽医》2010,37(6):78-83

通过鸡胚接种分离到3株猪流感病毒,经HI、RT-PCR鉴定,其中GXHZ株为H1N2亚型毒株,GXLZ、GXXY株为H3N2亚型毒株,并对分离株进行EID50测定及GXHZ株的猪体攻毒试验。所扩增分离到3株SIV病毒NA基因与A/Sw/Hainan/1/2005(H1N2)的核苷酸和氨基酸序列同源性最高。3株SIV分离株的NA基因在氨基端胞浆尾区均由K6→R6,在非极性跨膜区均由V20→M20。系统发育分析表明本试验所分离的3个SIV毒株与H1N2亚型毒株亲缘性最相近,且来源于猪源H1N2亚型流感病毒。从时间上也发现,3个分离株的NA基因与1996年以后获得的H3N2毒株亲缘关系很近,都隶属于一个亚分支。  相似文献   

串珠镰刀菌素对仔猪血清中猪瘟抗体水平的影响     

魏文康  黄露菡  王凯  唐兆新  温肖会  周秀蓉  罗胜军 《广东农业科学》2010,37(9):32-33,40

以三元杂仔猪为材料,研究了串珠镰刀菌素对仔猪猪瘟抗体水平的影响。结果表明,试验组在免疫后的第3、4、5、6周猪瘟抗体水平较对照显著降低(P0.01)。说明串珠镰刀菌素可降低猪体内血清中猪瘟抗体水平,抑制机体体液免疫的功能。  相似文献