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肉牛肠道寄生虫感染情况调查 总被引：3，自引：0，他引：3
为了解南乐县肉牛寄生虫感染情况,笔者随机选取4个规模化肉牛养殖场的共226份粪样进行寄生虫感染情况调查。结果共检出4种寄生虫的虫卵和卵囊,其中原虫2种(球虫、隐孢子虫),线虫2种（类圆线虫、鞭虫）。检测结果发现162份粪便样品为寄生虫阳性,寄生虫总感染率为71.68％(162／226),4个肉牛场的隐孢子虫平均感染率为4.42％,球虫平均感染率为51.12％,鞭虫平均感染率为15.84％,类圆线虫平均感染率为15.49％。本次调查发现肉牛寄生虫混合感染现象比较严重,混合感染的病例占总感染病例的63.58％,其中球虫、鞭虫和类圆线虫混合感染的病例占总感染病例的34.56％。调查还发现肉牛寄生虫感染率呈现随着年龄的增加而降低的趋势。 相似文献
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《中国兽医杂志》2018,(9)
为了对新疆不同地区舍饲条件下羊消化道寄生虫感染进行季节动态变化调查,采集了新疆生产建设兵团第三师、第六师和第十师范围内的4个规模化舍饲羊场羊新鲜粪便1 387份,鉴定粪便中寄生虫虫卵种类,并采用饱和盐水漂浮法和麦氏计数法计算其感染率及感染强度;剖检病弱羊19只,检查消化道内寄生虫虫体。结果表明,本次调查的4个舍饲羊场中,羊消化道寄生虫总感染率为69. 28%,夏季感染率最低。球虫的总感染率为63. 95%,羔羊感染率及感染强度高于成年羊;线虫的总感染率为13. 91%,主要为成年羊感染。经形态学初步鉴定,检出的羊消化道寄生虫为细颈线虫、马歇尔线虫、奥斯特线虫、捻转血矛线虫、球虫和细颈囊尾蚴,其优势虫种为球虫。 相似文献
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为了解河南省槐山羊肠道寄生虫的感染情况,应用寄生虫常规检测方法对周口市某规模化养羊场150份粪样进行寄生虫感染情况调查。结果共检出5类虫卵和卵囊,其中原虫2类（球虫、隐孢子虫）、线虫2类（类圆线虫、鞭虫）、绦虫1类。调查150份粪便样品全部为寄生虫阳性,寄生虫总感染率为100％,其中隐孢子虫感染率为5．33％,球虫的感染率为100％,鞭虫的感染率为10．67％,类圆线虫的感染率为57．33％,绦虫的感染率为44．67％。调查结果说明槐山羊肠道寄生虫混合感染现象较严重,寄生虫感染率呈随着年龄增长而降低的趋势。 相似文献
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绵羊肠道寄生虫感染情况调查 总被引：2，自引：1，他引：1
为了解河南省绵羊肠道寄生虫感染情况,应用寄生虫常规检测方法对5个规模化养羊场共1265份粪样进行了寄生虫感染情况调查。结果显示,共检出虫卵和卵囊5类,其中原虫2类(球虫、隐孢子虫)、线虫2类（类圆线虫、鞭虫）、绦虫1类。本次调查中共发现1178份粪便样品为寄生虫阳性,寄生虫总感染率为93.12％(1178／1265),5个绵羊场的隐孢子虫平均感染率为3.10％,球虫平均感染率为88.94％,鞭虫平均感染率为10.83％,类圆线虫平均感染率为59.11％,绦虫平均感染率为43.96%。本次调查发现绵羊寄生虫混合感染现象比较严重,其中球虫、绦虫和类圆线虫混合感染的比例达到60.10％;绵羊寄生虫感染率呈现随着年龄的增长而减少的趋势。 相似文献
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禄劝某猪场猪使用复方中药驱虫前后进行2次采集粪便,并进行肠道寄生虫检查,结果表明:用药前18份样品全部具有食道口线虫虫卵(100%),6份具有猪蛔虫虫卵(33.3%),有4份同时检出食道口线虫虫卵与猪蛔虫虫卵,混合感染率为22.2%,未见幼虫和原虫。用药后18份样品中9份具有食道口线虫虫卵(50%),3份具有猪蛔虫虫卵(16.7%),有1份检出食道口线虫虫卵与猪蛔虫虫卵混合感染,混合感染率为5.6%,未见幼虫和原虫。说明该猪场驱虫有一定效果,但未达到彻底驱虫的效果。结合该猪场寄生虫感染情况,提出了一些肠道寄生虫感染的防制措施和建议。 相似文献
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《中国动物传染病学报》2016,(4)
为提高放养地方黑猪寄生虫病防治效果,采用猪粪便中虫卵计数和刮屑镜检方法,对四川省9个区县13个种养结合模式放牧地方黑猪场的粪便和发酵处理肥料中寄生虫虫卵或卵囊进行了检测,并对地方黑猪进行体表寄生虫检查,同时采用现场观察和问卷方式调查寄生虫病流行因素。结果表明,四川省放牧地方黑猪的寄生虫种类主要有蛔虫、毛首线虫、其他线虫、球虫和疥螨;放牧黑猪的寄生虫病感染率和感染程度与驱虫药物的使用和活动场粪污清理频率有关。 相似文献
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为了解赤峰地区舍饲肉羊消化道线虫的感染情况,利用饱和食盐水漂浮法和改良麦克马斯特计数、镜检等方法对赤峰市旗县区舍饲肉羊采集的粪便样品进行检查.结果表明,在阳性粪便样品中共检测出6种虫卵,分别为捻转血矛线虫、细颈线虫、食道口线虫、仰口线虫、夏伯特线虫和球虫;赤峰地区舍饲肉羊消化道寄生虫总感染率为78.49％,线虫和球虫感染率分别为73.92％和53.79％;敖汉旗、松山区、巴林右旗、喀喇沁旗、翁牛特旗、克什克腾旗消化道寄生虫感染率分别为82.50％、92.26％、82.67％、66.25％、71.83％、71.76％,各旗县区虫卵减少率分别为59.27％、81.83％、45.50％、69.26％、65.79％、62.08％.试验结果可为赤峰地区的舍饲肉羊消化道线虫病的综合防治工作提供科学依据. 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