共查询到20条相似文献,搜索用时 62 毫秒
1.
弓形虫病是由弓形虫引起的一种人畜共患病.猪暴发弓形虫病时,可使整个猪场发病,痛死率高达60%以上,造成较严重的经济损失,并危害公共卫生安全.对野猪的弓形虫病进行阐述,以期为有效防控该病提供参考. 相似文献
2.
家畜弓形虫感染的血清学调查 总被引:1,自引:0,他引:1
家畜弓形虫感染的血清学调查孙照学,杨忠庆(贵州省六枝特区兽医防治检疫站655400)罗昌林(六枝特区农业局)弓形虫病是由真球虫目(Eucoccidina)肉孢子虫科(Sarcoyststidae)的龚地弓形虫引起人畜共患的一种寄生性原虫病。弓形虫最早... 相似文献
3.
弓形虫病是由刚地弓形虫引起的一种人畜共患原虫病.猪暴发弓形虫病时,可使整个猪场发病,死亡率高达60%以上,给养猪业带来的经济损失巨大.主要对一起猪弓形虫病的诊疗情况进行了介绍,以期为有效防治该病提供参考. 相似文献
4.
5.
猪弓形虫病(Toxoplasmosis)是由刚第弓形虫引起的一种原虫病,又称弓形体病。弓形虫病是一种人畜共患病,宿主的种类十分广泛,人和动物的感染率都很高。据国外报道,人群的平均感染率为25%~50%,有人推算全世界约有至少5亿人感染弓形虫。猪暴发弓形虫病时可使整个猪场的猪只发病,死亡率高达60%以上。我国弓形虫感染和弓形虫病的分布 相似文献
6.
7.
8.
弓形虫病是一种人畜共患病,人和动物的感染率都很高,犬是弓形虫的中间宿主之一.对犬弓形虫病的临床症状、病理变化以及诊断监测方法进行了综述. 相似文献
9.
上海市宠物犬及部分犬主弓形虫感染的调查 总被引:1,自引:1,他引:0
弓形虫病是一种人畜互通的疾病,其病原常见于各种哺乳类动物。作为宠物之一的大和人的关系密切,尤其是近年来随着生活水平的提高,不少地方出现宠物热,养狗养猫的人不少,因此其弓形虫感染的情况应引起足够的重视。狗弓形虫病的首例报告是由意大利的Mello在1910年报道的,以后在南非、亚洲、非洲、澳大利亚等许多国家和地区相继发现"'。我国于1979年先后在广西、甘肃(2)、辽宁(3)等地对狗的弓形虫感染作过一些调查。1983~1986年《中国人畜弓形虫病调查研究》协作组,在云南、福建、广西、四川、浙江、黑龙江等6个省,也曾经对1619只狗… 相似文献
10.
弓形虫病是由弓形虫引起的一种人畜共患病。猪暴发弓形虫病时,可使整个猪场发病,病死率高达60%以上,造成较严重的经济损失,并危害公共卫生安全。对野猪的弓形虫病进行阐述,以期为有效防控该病提供参考。 相似文献
11.
12.
13.
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
14.
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
15.
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
16.
17.
18.
19.
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
20.
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