Hybrid wild boar husbandry is an important component of livestock production in Northeast China.However,the current disease situation of these animals is largely unknown due to a lack of disease surveillance.The prese...Hybrid wild boar husbandry is an important component of livestock production in Northeast China.However,the current disease situation of these animals is largely unknown due to a lack of disease surveillance.The present study was conducted to determine the prevalence of several important viral diseases in the hybrid wild boar population of Northeast China.Between September 2015 to December 2016,169 blood and 61 tissue samples were collected from apparently healthy hybrid wild boars from farms in Jilin,Inner Mongolia and Heilongjiang provinces.ELISA detected serum antibodies against classical swine fever virus(CSFV),porcine reproductive and respiratory syndrome virus(PRRSV),pseudorabies virus(PRV),porcine circovirus type 2(PCV2)and Japanese encephalitis virus(JEV),but not against African swine fever virus(ASFV),with PCV2 having the highest seropositive rate(87.2–100%in different farms).RT-PCR or PCR performed on the processed samples detected only PCV2,with 33.1%(56/169)of blood samples and 32.8%(20/61)of spleen samples being positive,respectively,indicating widespread PCV2 infection in hybrid wild boars.Phylogenetic analysis of 15 PCV2 ORF2 sequences showed that they belong to genotypes PCV2a,PCV2b and PCV2d,with nucleotide and deduced amino acid homologies of 88.5–100%and 88.1–100%,respectively.展开更多
采用Real time PCR方法对野交杂种猪的NRAMP1基因进行了研究。结果表明,在大脑、肺脏、淋巴结、白细胞和脾脏组织出现强的扩增,在肝脏、回肠、肾脏、肌肉、心脏出现弱的扩增。Real time PCR的结果证实该基因在不同组织中的表达量都有差...采用Real time PCR方法对野交杂种猪的NRAMP1基因进行了研究。结果表明,在大脑、肺脏、淋巴结、白细胞和脾脏组织出现强的扩增,在肝脏、回肠、肾脏、肌肉、心脏出现弱的扩增。Real time PCR的结果证实该基因在不同组织中的表达量都有差异,其中在肾脏中表达的最高,在肝脏中表达最低,两者间相差71倍,从高到低依次是脾脏、大脑、肺脏、回肠、肾脏、淋巴结、结肠、心脏、肌肉和肝脏。展开更多
基金supported by the National Key Research and Development Program of China (2016YFC1201600)Wildlife Borne Infectious Diseases Monitoring Project of the State Forestry Administration (SFA) of China
文摘Hybrid wild boar husbandry is an important component of livestock production in Northeast China.However,the current disease situation of these animals is largely unknown due to a lack of disease surveillance.The present study was conducted to determine the prevalence of several important viral diseases in the hybrid wild boar population of Northeast China.Between September 2015 to December 2016,169 blood and 61 tissue samples were collected from apparently healthy hybrid wild boars from farms in Jilin,Inner Mongolia and Heilongjiang provinces.ELISA detected serum antibodies against classical swine fever virus(CSFV),porcine reproductive and respiratory syndrome virus(PRRSV),pseudorabies virus(PRV),porcine circovirus type 2(PCV2)and Japanese encephalitis virus(JEV),but not against African swine fever virus(ASFV),with PCV2 having the highest seropositive rate(87.2–100%in different farms).RT-PCR or PCR performed on the processed samples detected only PCV2,with 33.1%(56/169)of blood samples and 32.8%(20/61)of spleen samples being positive,respectively,indicating widespread PCV2 infection in hybrid wild boars.Phylogenetic analysis of 15 PCV2 ORF2 sequences showed that they belong to genotypes PCV2a,PCV2b and PCV2d,with nucleotide and deduced amino acid homologies of 88.5–100%and 88.1–100%,respectively.
文摘采用Real time PCR方法对野交杂种猪的NRAMP1基因进行了研究。结果表明,在大脑、肺脏、淋巴结、白细胞和脾脏组织出现强的扩增,在肝脏、回肠、肾脏、肌肉、心脏出现弱的扩增。Real time PCR的结果证实该基因在不同组织中的表达量都有差异,其中在肾脏中表达的最高,在肝脏中表达最低,两者间相差71倍,从高到低依次是脾脏、大脑、肺脏、回肠、肾脏、淋巴结、结肠、心脏、肌肉和肝脏。
文摘试验旨在研究杂交野猪猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)辽宁分离株的遗传变异情况及分子生物学特征。用Marc-145细胞从辽宁某杂交野猪场疑似猪繁殖与呼吸综合征(porcine reproductive and respiratory syndrome,PRRS)病猪血液中分离到1株病毒,该分离毒株经Marc-145细胞6次传代后出现稳定的细胞病变,采用RT-PCR方法对分离病毒进行ORF6和ORF7基因的扩增、克隆和测序,并与已知序列毒株的相应片段进行同源性比对。结果表明,分离毒株的ORF6、ORF7基因与国内外美洲型毒株的核苷酸同源性分别为96.0%~100.0%、94.5%~99.4%;氨基酸同源性分别为89.6%~100.0%、87.3%~98.7%;与欧洲型代表毒株LV的ORF6、ORF7基因差异较大,核苷酸同源性分别为70.4%、70.1%,氨基酸同源性分别为48.8%、49.7%。推测辽宁杂交野猪体内分离毒株在基因型上属于美洲型毒株。
