共查询到20条相似文献,搜索用时 86 毫秒
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生产山羊痘活疫苗通常是以绵羊羔睾丸细胞(以下简称STC)为底物,由于绵羊产羔有明显的季节性,给生产带来了困难;而且同源细胞生产本动物疫苗会带来自身污染的潜在危险,为此,我们进行了用犊牛睾丸3代细胞生产山羊痘活疫苗(以下简称BTC苗)的试验,并取得了较好的效果,现将试验... 相似文献
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1988年3~8月间,在张家口地区进行了以山羊痘疫苗免疫绵羊,防制绵羊痘的实际应用。对109个疫点及其受威胁区的337061只绵羊,注射了山羊痘疫苗,取得了良好效果。对改良细毛羊、纯种细毛羊及哺乳羔羊,都很安全,无不良反应;注苗羊获得保护,免疫效果确实,疫情于注苗后5~10日被控制。 相似文献
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山羊痘和绵羊痘统称为羊痘,前面对该病已有详细介绍,预防此病的根本办法是用疫苗免疫接种,山羊痘疫苗可同时预防山羊痘和绵羊痘两种疾病,我国主要采用山羊痘活疫苗预防此病。 相似文献
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在不利用冷冻保护剂的条件下,用犊牛血清对经胰酶消化分散的犊牛睾丸原代细胞进行超低温冷冻保存试验。结果表明,解冻后细胞成活率达75.73%以上,培养时可有效形成单层细胞,满足常规试验要求。复苏后的犊牛睾丸原代细胞于体外培养时存在贴壁迟缓,前期生长速度较慢等现象,且要求pH值低于7.0。 相似文献
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Bhanuprakash V Indrani BK Hegde R Kumar MM Moorthy AR 《Tropical animal health and production》2004,36(4):307-320
A classical live attenuated sheep pox vaccine was prepared using the Ranipet strain of sheep pox virus (SPV) at the 50th passage in a secondary lamb testicular cell system. The TCID50 and RD50 were 10(9.63)/ml and 10(9.51)/ml. respectively. The SID50 of SPV challenge virus was 10(5)/ml. The vaccine was found to have no adverse effects in laboratory animals, and was safe and effective in SPV seronegative lambs. In the field, 660 sheep were vaccinated with an immunizing dose containing 1 x 10(2) TCID50. Randomly selected vaccinated sheep mounted good cell-mediated immunity and humoral responses as measured by glucose utilization test and serum neutralization test, respectively, for the study period of 6 months. 相似文献
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Garner MG Sawarkar SD Brett EK Edwards JR Kulkarni VB Boyle DB Singh SN 《Tropical animal health and production》2000,32(4):205-223
A survey of sheep and goat producers in the state of Maharashtra, India, was undertaken to ascertain the extent and economic impact of sheep pox and goat pox (SGP). One thousand one hundred and sixteen owners were interviewed. Eighty owners (7.2%) reported that they had experienced an outbreak of the disease in the previous 6 years. The results showed that, while producers ranked SGP below other infectious diseases such as foot-and-mouth disease, rinderpest and enterotoxaemia, when SGP occurred it had a major impact, with average morbidity and mortality rates of 63.5% and 49.5%, respectively. Modelling studies suggested it would take about 6 years for a flock or herd to recover from an outbreak, with average annual losses in income of 30–43%, depending on flock type and the owner's actions. Statewide, it is estimated that around 5000 flocks and herds are affected by SGP annually in Maharashtra, costing up to INR 107.5 million. The highest losses occurred in the Aurangabad region. 相似文献
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旨在对甘肃某羊场小尾寒羊疑似绵羊痘进行确诊,并深入探讨其病理变化特点。对临诊疑似患绵羊痘的小尾寒羊进行了羊痘间接ELISA抗体检测和PCR检测确诊,并对6只病羊进行病理剖检、病理组织学和超微结构研究。结果如下:羊痘间接ELISA抗体检测显示6例病羊样品均为阳性;同时,对2例病羊样品进行PCR检测,均扩增出绵羊痘病毒(SPV)585 bp的目的基因片段,表明本次小尾寒羊所患疫病为绵羊痘。病理剖检显示,病羊皮肤无毛或少毛处充血,局部有红斑和坏死,尾部常有感染化脓形成溃疡;消化道黏膜,尤其舌和瘤胃黏膜有大小不等痘疹与坏死病灶,局部甚至形成糜烂或溃疡。肺膈叶以及肝、脾等常有痘疹和坏死病灶。病理组织学观察显示,肺痘疹病灶主要呈现渗出-增生结节和坏死-增生结节变化,病灶内血管、细支气管等周围常有大量绵羊痘细胞,胞质内有嗜酸性包涵体;病变消化道黏膜局部,上皮细胞程度不等增生、水泡变性,固有层及黏膜下层充血、水肿,有大量绵羊痘细胞,其细胞质内包涵体明显。肝、脾、肾也有程度不等坏死-增生结节变化。肺超微结构观察显示,肺泡上皮细胞肿大,细胞核浓缩、染色质聚集,线粒体程度不等肿胀、嵴断裂、空泡化,可见细胞质内包涵体。研究证明,除局部皮肤病变外,消化道黏膜和肺等实质器官的痘疹病变是患绵羊痘小尾寒羊具代表性的病理变化,尤其痘疹病灶中大量绵羊痘细胞的出现具有证病性意义。 相似文献
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论我国消灭羊痘的可行性和重要性 总被引:1,自引:0,他引:1
新中国成立以来,我国畜牧兽医事业发展迅速,成就突出。其中,最为突出的成就之一就是在全国范围内消灭了牛瘟和牛肺疫两大动物疫病。那么,我国下一个应该消灭哪种重大动物疫病呢?笔者通过深入调查和分析,认为这个问题的答案是羊痘。 相似文献
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猪瘟兔化高效细胞疫苗与猪用转移因子联合免疫程序试验 总被引:1,自引:0,他引:1
为提高仔猪40~70日龄猪瘟疫苗免疫抗体水平,采用猪瘟兔化高效细胞疫苗与猪用转移因子联合免疫的方法,进行了猪瘟疫苗免疫试验。在乳猪20日龄用猪用转移因子直接稀释猪瘟兔化高效细胞弱毒苗进行首免的试验1组与在断奶仔猪30日龄首免用同样方法稀释疫苗的试验2组相比,试验1组猪瘟抗体S/P平均值40日龄提高48.38%,差异显著(P0.05);50日龄提高54.80%,差异显著(P0.05);整个试验期提高14.99%。比采用常规方法常规程序的对照组猪瘟抗体S/P平均值40日龄提高104.28%,差异极显著(P0.01);50日龄提高97.74%,差异极显著(P0.01);60日龄提高111.19%,差异极显著(P0.01);70日龄提高37.83%,差异不显著(P0.05);80日龄提高37.89%,差异显著(P0.05);整个试验期提高39.93%。证实了在乳猪20日龄用猪用转移因子直接稀释猪瘟兔化高效细胞弱毒苗进行首免、30日龄断奶前后二免、60日龄左右三免的猪瘟疫苗程序,可以提高仔猪40~70日龄期间免疫抗体水平,阳性率在88%以上,为有效控制猪瘟流行提供了依据。 相似文献