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含抗凝剂样品对畜间布鲁氏菌病检测结果的影响 《畜牧与饲料科学》2015,36(10):0-0
[目的]探讨含抗凝剂样品对布鲁氏菌病虎红平板凝集试验和试管凝集试验的影响。[方法]选取2012年内蒙古东胜区周边牛、羊各50头(只),每只动物分别采集2份血液样品,其中一份用含有抗凝剂肝素钠采血管,另一份用不含任何抗凝剂的普通采血管。2份血液样品同时离心,取上清液按照动物布鲁氏菌病诊断技术进行试验。[结果]同只动物血液标本用含有抗凝剂采血管的试验结果均为布鲁氏菌病阳性,用不含抗凝剂的普通采血管结果均为布鲁氏菌病阴性。[结论]布鲁氏菌病虎红平板凝集试验和试管凝集试验不能使用含有抗凝剂的血液样品,易出现假阳性。 相似文献
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蒙文娟 《养殖与饲料．饲料世界》2014,(7):10-11
为了解血浆、血清对布氏杆菌病虎红平板凝集试验检测结果是否有影响,试验取20只成年羊的颈静脉血,分别进行了虎红平板凝集试验和试管凝集试验,结果发现：血清样品布氏杆菌病RBPT、SAT的检测结果均为阴性;血浆样品布氏杆菌病RBPT的检测结果均为阳性,SAT的检测结果均为阴性。 相似文献
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奶牛布鲁氏杆菌病的实验室诊断 总被引：3，自引：0，他引：3
该研究通过对阿勒泰市某奶牛场疑似布鲁氏杆菌病的33份血清样本,以及流产奶牛的胎衣、全血、牛奶做细菌分离培养、动物试验、虎红平板凝集试验、试管凝集试验、补体结合试验等方法来诊断奶牛的布鲁氏杆菌病。结果,从发生流产奶牛的血样、流产胎衣和牛奶中均分离出一种革兰氏阴性小杆菌,经诊断为布鲁氏杆菌;33份血清样本中,虎红平板凝集试验呈阳性的有6份,阴性27份;试管凝集试验呈阳性的有3份,可疑的有1份,阴性29份;补体结合试验中,阳性2份,其余31份为阴性。 相似文献
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奶牛布鲁菌病血清学调查及病原分离鉴定 《畜牧与饲料科学》2016,37(10):104-104
2015—2016年应用虎红平板凝集试验、试管凝集试验对新疆维吾尔自治区巴音郭楞蒙古自治州21个奶牛场、503个奶牛养殖户所饲养的奶牛进行了布鲁菌病血清学调查,虎红平板凝集试验阳性率为1.10%,试管凝集试验阳性率为0.82%。对2013—2016年4年内在该地区收集的奶牛流产胎儿、胎衣、阴道分泌物等243份病料进行布鲁菌的分离鉴定,结果分离出2株羊种2型布鲁菌和2株牛种3型布鲁菌。血清学调查及布鲁菌分离鉴定结果佐证了在该地区存在布鲁菌病,建议奶牛养殖场（户）和有关部门切实做好布鲁菌病的检疫及防控工作。 相似文献
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杨更善 《青海畜牧兽医杂志》2012,42(3):27-27
对民和县川水地区奶牛进行了随机抽样,共抽检血清样品550份。按照国家通用的检测标准,对所抽样品先用虎红平板凝集试验进行筛选,把检出的阳性血清再用试管凝集试验进行了确定,结果：虎红平板凝集试验检测出阳性数为28份,阴性522份,阳性率为5．1％;试管凝集试验检出阳性数为20份,阴性527份,可疑3份,阳性率为3．6％。检测结果表明民和县的奶牛仍然存在布病的感染。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献
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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献
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Billinghurst RC Brama PA van Weeren PR Knowlton MS McIlwraith CW 《American journal of veterinary research》2004,65(2):143-150
OBJECTIVE: To determine whether serum concentrations of biomarkers of skeletal metabolism can, in conjunction with radiographic evaluation, indicate severity of osteochondrosis in developing horses. ANIMALS: 43 Dutch Warmblood foals with varying severity of osteochondrosis. PROCEDURE: 24 foals were monitored for 5 months and 19 foals were monitored for 11 months. Monthly radiographs of femoropatellar-femorotibial and tibio-tarsal joints were graded for osteochondral abnormalities. Serial blood samples were assayed for 8 cartilage and bone biomarkers. At the end of the monitoring period, foals were examined for macroscopic osteochondrosis lesions. RESULTS: Temporal relationships were evident between certain serum biomarkers and osteochondrosis severity in foals during their first year. Biomarkers of collagen degradation (collagenase-generated neoepitopes of type-II collagen fragments, type-I and -II collagen fragments [COL2-3/4C(short)], and cross-linked telopeptide fragments of type-I collagen) and bone mineralization (osteocalcin) were positive indicators of osteochondrosis severity at 5 months of age. In foals with lesions at 11 months of age, osteochondrosis severity correlated negatively with COL2-3/4C(short) and osteocalcin and positively with C-propeptide of type-II procollagen (CPII), a collagen synthesis marker. Radiographic grading of osteochondrosis lesions significantly correlated with macroscopic osteochondrosis severity score at both ages and was strongest when combined with osteocalcin at 5 months and CPII at 11 months. CONCLUSIONS AND CLINICAL RELEVANCE: The ability of serum biomarkers to indicate osteochondrosis severity appears to depend on stage of disease and is strengthened with radiography. In older foals with more permanent lesions, osteochondrosis severity is significantly related to biomarker concentrations of decreased bone formation and increased cartilage synthesis. 相似文献