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石首市长江故道地区血吸虫病流行情况调查 总被引：1，自引：0，他引：1
石首市长江故道地区血吸虫病流行情况调查，通过调查表明，人、牛、猪、羊血吸虫病感染率分别为8．08％、16．10％、11．72％、14．28％，在野粪单元抽样调查中，粪检发现麋鹿血吸虫病野粪粪样阳性率为29．23％。 相似文献
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南方山地牧场绵羊消化道线虫感染情况调查及虫卵季节动态的观察 总被引：1，自引：0，他引：1
本文对湖南南山牧场绵羊消化道线虫的感染情况进行了调查，并通过定期粪检观察了虫卵的季节消长动态。经查明，绵羊消化道线虫总的感染率为96．0％，平均EPG为27．3个(1～381个)；线虫共8种(类)，感染率分别为捻转血矛线虫60．0％、食道口线虫64．0％、仰口线虫68．0％、夏伯特线虫74．0％、毛圆线虫58．0％、类圆线虫44．0％、奥斯特线虫42．0％、细颈线虫12．0％，以前5种(类)为优势种(类)；阳性羊中，多为2种(类)以上线虫合并感染，其中又以4～5种(类)线虫合并感染居多。定期粪检表明，绵羊粪中虫卵总数有明显的季节消长规律，全年中出现两个高峰期，即2月呈一小的高峰，6～8月出现大的高峰(夏季高峰)，但有些种(类)线虫的消长与总的消长规律不尽一致。 相似文献
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我市是血吸虫病的重疫区之一。资阳区茈湖口镇地处洞庭湖区，饲养猪农户很多，猪的血吸虫感染对疫区血吸虫病的消长关系甚大，为此进行了一次猪血吸虫病感染情况的调查。本调查结合1997年10～11月由丹麦皇家农业大学实验寄生虫学中心的A．Lee．Wingham博土和Jaap．B先生及上海家畜寄生虫病研究所有关专家对猪血吸虫病自发感染率的调查内容进行。本文报道，在茈湖口镇万子湖畔沿堤农户所养猪中，猪血吸虫病感染率的调查情况。1．材料与方法1．1粪检材料：由当地兽医收集该镇万子湖畔沿堤村落拓头河、石马、曾明、明朗和东城等5个自然村149… 相似文献
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选择湖北省江陵县5个行政村的水牛和黄牛，用血清学诊断法、饱和盐水漂浮虫卵法、顶管毛蚴孵化法检测日本血吸虫感染情况，并采用抽样法对调查村所属的湖滩钉螺分布情况进行了检查。结果，牛日本血吸虫病血清抗体检查阳性率为17．92％，饱和盐水漂浮虫卵法检查阳性率为19．46%，粪便毛蚴孵化法检查阳性率为16．04%，5个村湖滩钉螺的平均密度为0．445只／m^2。结果显示，该县日本血吸虫病流行严重。 相似文献
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本文采用饱和盐水漂浮法对徐州市郊区散养奶牛消化系统寄生虫进行了初步调查。粪检结果表明：该地区散养奶牛消化系统寄生虫的总感染率为83．19％(94／113)，所获寄生虫13种，隶属于10科13属。通过对各种寄生虫的感染率，不同调查点、不同年龄奶牛寄生虫的感染率及混合感染情况等进行分析，认为徐州市郊散养奶牛寄生虫感染率高，混合感染普遍，应加强寄生虫防治。 相似文献
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选择赤峰地区 3～ 4月出生绵羊羔 5 1只 ,新 2岁羊 2 4只 ,连续两年逐月剖检及粪检 ,每月剖检 2～ 3只 ,固定 13只羔羊检卵 ;大群随机抽查粪检羊羔 15 4只 ,新 2岁羊 10 3只。结果表明 :赤峰地区幼龄羊感染的绦虫有扩展莫尼茨绦虫、贝氏莫尼茨绦虫、盖氏曲子宫绦虫、中点无卵黄腺绦虫等 4种 ,其中莫尼茨属和曲子宫属是本地区优势虫种。剖检当年 ,羔羊绦虫感染率为 5 5 .2 6 % ,强度 1～ 6条 ;新 2岁羊绦虫感染率为 6 6 .6 7% ,强度 1～ 4条。粪检当年 ,羔羊绦虫感染率 30 .5 2 % ,新 2岁绦虫感染率 46 .15 %。逐月剖检幼龄羊裸头科绦虫的季节动态为 :当年 3～ 4月出生羔羊 6月下旬检出虫体 ,8～ 9月是当年羔羊感染的高峰期 ,感染率达10 0 % ,翌年的 1～ 3月形成新 2岁羊的感染高峰。粪检当年羔羊 8～ 9月为排卵高峰 ,新 2岁羊在 2～ 3月、8～ 9月形成排卵高峰。据此 ,确定防治适期在 7月下旬至 8月和 11月下旬至 12月 ,实施年内两次驱虫 相似文献
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吕才福 《青海畜牧兽医杂志》2008,38(5)
2004-2006年,对共和县绵羊寄生虫感染和危害情况进行了调查,结果：绵羊线虫粪检阳性率100％,线虫、绦虫和吸虫剖检感染率分别为100％、27．5％和60％,外寄生虫主要有绵羊虱蝇、草原草蜱和羊鼻蝇幼。文中并对危害以及防治情况进行了讨论和分析。 相似文献
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1978年1月—1979年12月,我们对西班牙 Leon 省4个区域的羊群进行了由阿沙塔艾美尔球虫(Eimeria ahsata)引起的球虫病的流行病学调查。结果表现:感染强度为25.5±1.7%,并且冬、夏季感染率都差不多。E.ahsata 是最常见的球虫,检出率占被检1620份粪样的83.1%,占被检羊的86.2%。含一种球虫卵襄的阳性粪样仅占0.3%,含4种球虫的粪样最常见(占19%),23%的粪样含5种球虫,31.3%的粪样含6种球虫。 相似文献
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2011年对8个家畜血吸虫病观测点血吸虫感染、野粪污染情况以及螺情进行了调查.全年共检测了21091头牛、1425只羊以及1760头(匹)其他家畜,血吸虫病感染率分别为0.42％、0.63％和0％.在97头(只)感染家畜中,90.72％(88头)为牛,9.28％(9只)为羊.江西省吴城镇和湖南省南大膳镇的牛血吸虫感染率超过4％.在湖南省和江西省的观测点中发现家畜粪便有血吸虫虫卵污染,其中96.15％阳性野粪为牛粪.所有观测点都有钉螺分布,但阳性钉螺主要分布在湖南省和江西省的观测点.观测结果显示湖南省洞庭湖和江西省鄱阳湖地区是目前防控家畜血吸虫病的重点地区,且病牛依然是血吸虫病疫区(尤其是湖沼型地区)的主要传染源. 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