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牛病毒性腹泻黏膜病的诊断要点及防治措施 总被引：1，自引：0，他引：1
牛病毒性腹泻-黏膜病又称牛病毒性腹泻、牛黏膜病。本病是由牛病毒性腹泻-黏膜病病毒引起的牛的热性传染病。临床特征是厌食,腹泻、脱水、体重减轻,黏膜发炎、糜烂和坏死,以及流产胎儿发育异常等。 相似文献
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牛病毒性腹泻-黏膜病又称牛病毒性腹泻．牛黏膜病。本病是由牛病毒性腹泻-黏膜病病毒引起的牛的热性传染病。临床特征是厌食，腹泻、脱水、体重减轻，黏膜发炎．糜烂和坏死，以及流产胎儿发育异常等。 相似文献
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牛病毒性腹泻-黏膜病（BVD-MD）又称牛病毒性腹泻病,由牛病毒性腹泻黏膜病病毒（BVD-MDV）引起。笔者从牛病毒性腹泻病的流行特点、临床症状、发病特点、治疗及预防方法等方面进行介绍。 相似文献
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牛病毒性腹泻又称牛黏膜病,是由牛病毒性腹泻病毒引起的一种主要以黏膜发炎、糜烂、坏死、发热和腹泻为特征,发生于牛的热性传染病.由于牛病毒性腹泻分布广泛,流行性严重,是我国乃至国际贸易中一种重要的牛的传染病之一,严重危害我国养牛业的健康可持续发展,造成养牛业巨大的经济损失.为有效的防治牛病毒性腹泻,本文从流行病学、临床变化... 相似文献
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《畜牧兽医科技信息》2020,(8)
正牛病毒性黏膜病又称牛病毒性腹泻,是由牛病毒性腹泻病毒引起,幼龄牛感染率最高,全年均可发病。本文简要介绍了牛病毒性黏膜病的流行特点、临床症状和诊断方法,提出了针对性的防治建议。1流行特点牛病毒性黏膜病是牛感染病毒性腹泻病毒引起的,该病毒各年龄的牛都易感染,而且感染率还很高,以幼龄牛最为高发。这是因为新生牛犊在吸吮母乳时,可以获取一定的母 相似文献
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牛病毒性腹泻/黏膜病简称病毒性腹泻或黏膜病,1946年由Olafson等在纽约首次发现,牛病毒性腹泻病(BVD)是由牛病毒性腹泻病毒引起的牛传染病,其特征是急性糜烂性口炎、消化道黏膜糜烂坏死、胃肠炎和腹泻。在多数牛群中感染率高,但临床发病率低。本病呈全球性分布,各养牛业发达国家均有流行。我国存在着严重的污染。 相似文献
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牛病毒性腹泻又叫做牛病毒性腹泻或者叫做牛黏膜病。这是一种传染病,主要是由牛病毒性腹泻病毒引发的而且呈现的是隐性的感染性的疾病。牛病病毒性腹泻有急性的传染病也有慢性的传染病症状,急性的病症会出现发热的腹泻症状,慢性的病状没有急性这么明显。患病的牛会出现腹泻、鼻腔的黏膜发炎、口腔发炎等症状。 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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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 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