水貂细小病毒的分离鉴定

用F65细胞从疑似传统性肠炎的病死貂肠内容物中分离出一株病毒。经免疫电镜观察、细胞培养物核内包涵体检查以及血凝抑制试验证实为水貂细小病毒。     

犬细小病毒的分离与鉴定

<正> 犬细小病毒(CPV)是引起犬急性出血性胃肠炎和幼犬心肌炎的主要病原。1977年首次由Eugster和Nairn从患腹泻的病犬粪便中分离出病毒,随后许多国家陆续报道。1980年秋以来,在我国警犬中发生疑似本病的流行,对养犬业造成了极大的威胁,严重影响了我国警(军)犬事业的发展。1982年开始使用国外引进疫苗,但仍未控制流行。为查清病原,确定病性,以便提供有效地诊断和     

犬细小病毒的分离鉴定

用猫肾(F81)细胞从沈阳某养犬场病死犬的肠内容物中,分离到1株细小病毒.根据犬细小病毒(CPV)VP2基因的核苷酸序列设计合成了两对特异性引物,对分离的病毒株进行PCR扩增,分别得到846 bp和815 bp的2个片段,PCR产物经纯化后测序,测序结果与GenBank中已发表的CPV参考株PLI-IV(typeFPV)、CPV-b(type2)、V154(type2a)、LCPV-V204(type2b)、LCPV-V139(type2c(a))和LCPV-V203(type2c(b))的VP2基因序列相比较,根据分析比较的数据结果,确定此株细小病毒为CPV-2a亚型.     

水貂肠炎细小病毒分离鉴定

从送检的疑似水貂病毒性肠炎的水貂粪便中分离出一株病毒,经形态学、理化特性、血清学和动物试验鉴定表明,分离的病毒为水貂肠炎细小病毒。     

猪细小病毒的分离与鉴定

贵州某猪场发生一起以初产母猪产弱仔、死胎、畸形胎、木乃伊胎为特征的疫病,根据病毒的分离与鉴定,确诊此次疫病为猪细小病毒感染所致。     

猫细小病毒的分离与鉴定

利用F81传代细胞从病死猫脾脏中分离获得1株病毒,该毒株可使培养细胞出现明显的细胞病变（CPE）。并对其进行形态学、理化学、人工感染试验和分子病毒学等鉴定,证明所分离的这株病毒为猫细小病毒。     

广西番鸭细小病毒的分离和鉴定

198 5年以来在我国的福建、广东、浙江、江西等省先后发生了以腹泻、呼吸困难和脚软为主要症状的番鸭细小病毒病 ,对 1 -3周龄的雏番鸭危害极大。 1 989年法国西部也发生了致死率为 80 %的番鸭细小病毒病 ,并分离到了病毒。广西从 1 996年开始在番鸭中也出现了类似疾病 ,为了明确病因 ,我们从广西各地采集疑似番鸭细小病毒的病料 ,进行了病原分离和鉴定 ,结果如下。1　材料和方法1 .1　标本的采集和处理从南宁市郊、北流、博白、柳州等地采集 2 0余份病死雏番鸭的肝、脾、胰等脏器 ,用含双抗的Ｈａｎｋ’ｓ液按 1∶5的比例磨成组织混悬液 ,…     

猪细小病毒的分离与鉴定

本试验从福建省某猪场疑似猪细小病毒病死胎的淋巴结、肝脏中分离到1 株病毒。病料接种PK-15细胞36 h后出现了圆缩、集聚、脱落等细胞病变,猪细小病毒阳性血清能特异性地中和该分离病毒。根据已发表的细小病毒(PPV) VP2基因的序列设计并合成了一对引物,采用PCR方法可扩增531 bp DNA片段。测序结果表明,分离株VP2基因与NCBI公布的NADL-2株的同源性高达99.2％,证实分离的病毒株为猪细小病毒。为进一步开展该病毒致病机理、流行病学、诊断研究与疫苗免疫等奠定了基础。     

番鸭细小病毒的分离与鉴定(摘要)

番鸭细小病毒病又称雏番鸭"三周病",是由细小病毒引起,侵害雏番鸭的一种急性、高度接触性传染病,以喘气和腹泻为主要症状.1985年以来,在我国的福建、广东、浙江、江西等省先后发生该病,对1-3周龄雏番鸭危害极大.1989年法国西部也发生了致死率为80%的番鸭细小病毒病,并分离到了病毒.广西从1996年开始在番鸭中也出现了类似疾病,为了明确病因,我们从广西各地采集疑似番鸭细小病毒病料,进行了病原分离和鉴定.     

Studies on the replication of a bovine parvovirus

Optimal replication of a bovine parvovirus type 1 was found to occur when parasynchronous bovine embryonic lung cells were infected during the S phase of the cell cycle, just prior to maximum DNA synthesis. Viral antigen was first detected in the cytoplasm by immunofluorescence at 8 h post-infection, reaching a maximum at this location by 16 h and then disappearing. In the nucleus, antigen was first detected at 12 h, concurrent with early inclusion body formation and first detection of intracellular virus production. Intranuclear antigen then increased rapidly to a maximum at 20 h, as the inclusions progressively matured, large amounts of virus were produced within the cell, with some release to the environment. From 24 h, the nuclear inclusions became increasingly shrunken and basophilic as virus migrated to the cytoplasm and was progressively released to the exterior concurrent with cell degeneration and fragmentation. The majority of virus remained cell associated, even at 28 h post-inoculation. Two morphological types of early and late stage intranuclear inclusions were produced by the virus, these appearing to be a distinct feature of bovine strains. In other aspects, the replication of bovine parvovirus appeared similar to that of other members of the genus.     

牛乳腺上皮细胞的分离培养

为了对牛乳腺上皮细胞(MECs)进行分离、培养和鉴定,并研究细胞分泌功能,试验通过胶原酶消化法分离得到了牛乳腺上皮细胞,采用传代法对细胞进行纯化,对细胞标志蛋白进行免疫荧光染色鉴定,通过体外诱导和RT-PCR分析鉴定细胞的分泌功能。结果表明:分离到的牛乳腺上皮细胞具有典型乳腺上皮细胞的形态特征,表达广谱角蛋白,经诱导后可分泌β-酪蛋白。     

Isolation of bovine ovarian inhibin, its immunoneutralization in vitro and immunolocalization in bovine ovary

A purification scheme involving gel permeation chromatography, anion exchange chromatography and reversed-phase high performance liquid chromatography (RP-HPLC) was used to isolate from bovine follicular fluid (FF) biologically-active inhibin of molecular weight 32 kDa. Chromatographic fractions were monitored for inhibin-like biological activity (ILA) using a simplified bioassay procedure in which a suppression of total basal FSH production by rat pituitary cells in monolayer culture indicates the presence of ILA. Approximately 3 mg protein having an ILA potency (ED50 value in in vitro bioassay) of 1.7 ng/ml was obtained from 4 1 crude bovine FF (260 g protein; ILA potency 3750 ng/ml) reflecting an approximate 2200-fold purification factor with an overall recovery of about 3%. The isolated material appeared as a single major UV absorbance peak on RP-HPLC and as a single band (32 kDa) when subjected to SDS-PAGE (15% gel) under non-reducing conditions. Under reducing conditions the molecule dissociated into 2 subunits of apparent molecular weight 22 and 14 kDa confirming that it is probably identical to the 31/32 kDa form of bovine ovarian inhibin previously reported by two other independent research groups. An antiserum raised in a chicken against the isolated material completely neutralized the suppressive effects of both 32 kDa inhibin and bovine FF on basal production of FSH by rat pituitary cells in vitro but only partially reversed the suppressive effects of both porcine and human FF. Immunohistochemical staining of sections of bovine ovary and of isolated preparations of bovine granulosa cells using this antiserum confirmed that granulosa cells are a major source of inhibin. The observation that specific immunostaining was not confined to these cells, however, suggests that they may not be the exclusive source of immunoreactive inhibin in the bovine ovary.     

1株牛传染性鼻气管炎病毒的分离鉴定

在对进口种用奶牛隔离检疫期间,从1头IBRV中和抗体阳性奶牛中分离出1株病毒。该分离株表现类似于IBRV特征的细胞病变,细胞圆缩,聚集成葡萄串样群落,在单层细胞上形成空洞。用特异性抗IBRV阳性血清与其进行中和试验,发现IBRV标准阳性血清对分离株的中和抗体滴度为27,与IBRV标准株的中和抗体滴度相差不到1个滴度。用OIEV推荐的IBR特异性引物对分离病毒进行PCR扩增,获得与设计基因片段大小一致的特异性条带,表明分离到的病毒为IBRV。     

Isolation and monolayer culture of bovine oviduct epithelial cells

Oviduct epithelia obtained from 32 cows were cultured. The oviducts were classified into follicular and luteal phases and divided into ampulla and isthmus regions. The epithelial cells were dissociated by enzyme digestion and cultured in plastic dishes with Dulbecco's modified Eagle's medium/Ham's F12 (1:1) containing 10% calf serum. After enzyme treatment, the epithelial suspension showed free ciliated and non-ciliated cells, and cell mass. The non-ciliated cells contained secretory granules in the cytoplasm. The cell mass was composed of ciliated and secretory cells. The cell mass adhered to the dish within 12-24 hr, while the free ciliated cells attached on Day 2 of the culture. The cells grew into confluent monolayers on Day 4. The cell monolayers contained ciliated and non-ciliated cells. The monolayered non-ciliated cells showed a few secretory granules. When the cells were further cultured without subculturing, ciliary activity diminished on Day 5 and was rarely detected on Day 9. When the cells were subcultured on Day 3, ciliary movement was detected on the monolayers for only 2 days. Cell mass that did not adhere to the dish and remained floating in the medium formed ball-like structures on Day 2. Active ciliary beating was observed on the cells that were cultured in the medium supplemented with 10(-5) and 10(-9) M estradiol-17 beta, however, the ciliary activity diminished on Day 5. No difference in the cell growth was observed between the follicular and luteal phases or between the ampulla and isthmus regions.