共查询到19条相似文献，搜索用时 250 毫秒
1.
2.
3.
[目的]检测反刍动物饲料和动物源性饲料中牛羊源成分,掌握动物饲料安全情况。[方法]利用聚合酶链式反应法（PCR法）对反刍动物饲料产品（预混料、精料补充料、全价配合料等）和动物源性饲料产品（鱼粉、肉粉等）共计300个样品进行了牛羊源成分检测。[结果]牛羊源性成分检测合格率为99.33%。其中,反刍动物饲料产品260批次,牛羊源性成分合格率为99.23%;动物源性饲料产品40批次,均未检出牛羊源性成分。2个阳性样品均为牛源阳性。[结论]反刍动物饲料产品存在潜在的安全隐患。 相似文献
4.
5.
6.
目的:为了监测新疆反刍动物饲料和动物源性饲料产品中的牛羊源性成分,掌握动物饲料安全情况。方法:2006～2011年应用实时荧光PCR法对新疆15地(州、市)的4432批反刍动物饲料及动物源性饲料产品进行牛羊源性成分的抽样检测。结果:结果表明,2006年共有4批产品被检出含有牛羊源性成分,其涉及所有抽检产品类别和饲料生产、经营、使用3个环节;2007～2011年的抽检合格率均达100%。结论:说明新疆的反刍动物饲料和动物源性饲料的牛羊源性成分呈现下降趋势,反刍动物饲料逐步向安全生产及使用的方向发展。 相似文献
7.
8.
《黑龙江畜牧兽医》2016,(3)
为了快速、灵敏检测反刍动物饲料中的牛羊源成分,试验采用双重荧光PCR方法,根据线粒体环氧酶2(Cox2)和细胞色素b(Cytb)基因,分别设计牛羊特异性引物序列,基于SYBR荧光PCR技术,分析熔解曲线,根据吸收峰的位置不同,定性识别牛羊源成分。结果表明:试验测得单重牛PCR产物熔解曲线吸收峰对应的熔解温度为(76.0±0.5)℃,羊PCR产物熔解曲线吸收峰对应的熔解温度为(81.5±0.5)℃,且双重体系吸收峰与单重对应的熔解温度吻合,说明试验可行。试验检测牛成分的灵敏度为0.01%,检测羊成分的灵敏度为0.1%。该方法可以同时定性检测饲料中牛羊源性成分,成本较低,节省时间,可以应用于高通量的实际检测样品,灵敏度较高。 相似文献
9.
10.
应用PCR法监测反刍动物饲料与动物源性饲料中的牛羊成分,是当前一项行之有效的检测方法,是防止疯牛病等烈性传染性疾病的发生与流行,保障市场上牛羊肉食品的质量安全,促进草食动物养殖进一步发展的重要措施。但是,由于各种检品的成分差异性较大,样品的均匀度不高,待检样品的取样量与检测值的相关性不强。为此,2008年和2009年,我们在对牛羊饲料与动物源性饲料中牛、羊成分采用PCR法进行检测的同时,进行了不同称量对检测值的影响和不同检测方法间的对比检测与研究。现将试验与检测的中的有关情况简要介绍如下。 相似文献
11.
陕西省反刍动物饲料产品和动物源性饲料中牛羊源成分检测 总被引：1，自引：0，他引：1
实时PCR对陕西省7个地市生产、经营和使用的反刍动物饲料产品和动物源性饲料产品(原料)进行了牛羊源成分检测调查.结果表明,235家反刍动物养殖场(户)合格率为98.72%,53家饲料生产企业合格率为96.22%,40家饲料经营企业合格率为100%;合计抽查328家饲料企业(场、户),总合格率为98.47%.400批次反刍动物饲料产品和动物源性饲料产品合格率为98.75%.其中反刍动物饲料产品364批次,合格率为98.63%;动物源性饲料产品36批次,合格率为100%.而其中不合格的5批次产品中2批次样品牛羊源性成分均检出,3批次样品仅检出牛源性成分. 相似文献
12.
为鉴定和区分饲料及动物产品中牛、山羊、绵羊源性成分,根据线粒体DNA(mitochondrial DNA,mtDNA)种间保守序列,设计合成了3对特异性引物与TaqMan探针,通过对荧光PCR反应体系和反应条件的优化筛选,建立了三重荧光PCR方法,在同一个荧光PCR反应中完成3种动物源性成分的检测。用该方法对16种不同源性的动物DNA进行检测,结果表明能特异地鉴别检测出牛、山羊和绵羊源性成分,且敏感性比现行国标PCR法高100倍。该方法适用于饲料、肉制品、奶制品等动物源性产品的检测。 相似文献
13.
[目的]建立德系乳肉兼用型西门塔尔牛群体,探索文山牛快速扩繁和生产性能提升技术。[方法]在马关县从600头文山黄牛、西本杂、安本杂和短本杂牛母牛中选择270头,用CIDR+PG法进行同期发情处理,选择黄体合格的受体,采用非手术法移植德系乳肉兼用型西门塔尔牛胚胎,在移植后60~90 d通过直肠检查法进行妊娠诊断,确定妊娠率,跟踪调查产犊情况,并测定胚胎移植所产犊牛的初生体重和主要体尺指标。[结果]受体牛同期发情处理270头,胚胎移植87头,妊娠28头,移植妊娠率32.18%;妊娠母牛中产犊17头,产犊率60.71%,产犊19头,成活16头,产犊成活率84.21%。公母犊牛平均的初生重33.00 kg,体高69.50 cm,体斜长62.19 cm,胸围72.69 cm,管围13.50 cm。[结论]首次在文山州开展了牛胚胎移植获得成功,杂交牛受体的移植妊娠率极显著或显著高于文山牛受体,秋季移植的妊娠率极显著高于春季和冬季的。提示以杂交牛为受体在秋季进行胚胎移植可有效提高移植成功率。 相似文献
14.
E L Taracha A D Irvin S P Morzaria S K Moloo J M Katende J N Kiarie 《Veterinary parasitology》1986,22(3-4):215-222
Two experiments were carried out in which uninfected cattle, or cattle chronically infected with Trypanosoma congolense, were immunized by the infection and treatment method against East Coast fever (ECF; Theileria parva infection). Chronic trypanosomiasis did not prevent cattle mounting an effective immunological response to ECF immunization and resisting subsequent lethal challenge. There appeared to be no difference in the level or quality of immunity between uninfected cattle and trypanosome-infected cattle. Thus, T. congolense infection on its own does not appear to provide a constraint to ECF immunization in the field. 相似文献
15.
Field trials were carried out with two formulations of levamisole for treatment of chronic inflammatory lesions on the muzzle and teats of cattle, caused by Stephanofilaria okinawaensis in the enzootic area of the disease, Ishigaki Island, Okinawa Prefecture, Japan.Cattle were treated orally with levamisole hydrochloride (10% powder) at a dose of 7.5 g/100 kg of body weight once (64 cattle) or twice with an interval of 3 or 4 weeks (five cattle each). Lesions on the muzzle and tests disappeared or were reduced within 4 weeks of the first medication. In some cattle a sign of recurrence was observed 8 weeks after medication.Parasitological and histological examinations were carried out 1 week carried out 1 week (10 cattle), 4 weeks (12 cattle), and 8 weeks (13 cattle) after single oral administration of levamisole hydrochloride. No Stephanofilaria worms were detected at 1 week after medication. A small number of worms were detected at 4 weeks and more were observed 8 weeks after medication.A levamisole phosphate solution (18.2%) was injected subcutaneously once into one teat of each of three cattle, or twice into the neck with a 4-week interval between treatments (five cattle). The dose was 2 ml/teat (364 mg of active ingredient) or 2 ml/45 kg of body weight for the side of the neck. There was marked improvement as with oral medication with levamisole hydrochloride powder. 相似文献
16.
S. Lotfollahzadeh Gh. R. Nikbakht Boroujeni M. R. Mokhber Dezfouli S. Bokaei 《Zoonoses and public health》2011,58(1):54-59
A seroepidemiological survey to determine the prevalence of Crimean‐Congo haemorrhagic fever (CCHF) virus among dairy cattle in Iran was carried out during 2006 and 2008. Blood samples were collected from 876 animals in five different provinces of the country. Sera were tested by a sandwich enzyme‐linked immunosorbent assay (ELISA) for quantitative determination of antibodies to CCHF virus. Serological evidence of infection was noted in 52 (5.9%) of 876 dairy cattle. Antibody prevalence increased with age; 78.8% seroprevalence in cattle older than 3 years versus 21.2% in animals less than 2 years old. There was a difference between provinces representing north‐east (11.7%) and east (2%) of Iran. 相似文献
17.
The paper describes the epidemiological investigation carried out on two dairy farms with cattle infected with Taenia saginata cysts. On the first affected farm it was estimated using Bayesian techniques that approximately 65% of 1400 mixed-age cattle were infected with Taenia saginata cysts. The investigation aimed to determine potential exposure pathways of cattle to Taenia saginata with a view to finding the human source of infection and to describe the epidemiology of the outbreak on the affected farms. In order to determine potential exposure pathways, investigation was centred on how feed or water could have been contaminated with eggs. The plausibility of pathways was determined by examining the spatial and temporal association between factors related to the pathway and the prevalence of infection in cattle strata. We describe the investigation carried out on affected farms. 相似文献
18.
19.
几年来,广西象州县的多个牛人工授精品改点的受胎率,黄牛为40%~50%,水牛为30%~40%,在这样的情况下,牛的受胎率有待提高。人绒毛膜促性腺激素在母牛体内具有促进卵泡发育、排卵的作用;利用人绒毛膜促性腺激素的这一特性,在母牛发情时肌肉注射,然后进行输精,观察对母牛的受胎率的影响,是否能够提高牛人工授精工作的效益。结果显示,在牛人工授精工作中使用了人绒毛膜促性腺激素,能够提高受胎率,也提高了工作效益。 相似文献