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寄生虫病可导致猪增重缓慢、饲料报酬降低，甚至死亡，对养猪业危害极大。辽宁省养养猪大省，猪年饲养量在2000万头左右，且大多为规模化饲养。为了搞清辽宁省规模化猪场猪寄生虫的感染情况，给防治工作提供科学依据，结合我院寄生虫课教学实习，在2001～2003年对辽宁省不同地区规模化猪场寄生虫的感染情况进行了随机抽样调查，现将调查结果报告如下。 相似文献
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为了给辽宁省猪寄生虫病防治工作提供科学依据,试验采用全身性寄生虫学剖检和现场临诊检查相结合的方法,对辽宁省不同区域规模化猪场饲养的猪和散养猪各150头进行了随机抽检。结果表明:辽宁省规模化猪场饲养的猪感染体内外寄生虫共17种,分别隶属于9纲14科16属;散养猪感染体内外寄生虫共30种,分别隶属于9纲22科27属。辽宁省规模化猪场饲养的猪寄生虫优势虫种为猪疥螨、猪蛔虫、猪毛首线虫、有齿食道口线虫、细颈囊尾蚴,散养猪优势虫种为猪蛔虫、长刺后圆线虫、蛭形巨吻棘头虫、猪疥螨、细颈囊尾蚴、猪毛首线虫、有齿食道口线虫、结肠小袋虫。 相似文献
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在规模化养猪生产过程中，由于猪群的密度高、饲养量大，寄生虫容易流行传播。通常情况下，规模化养猪场感染流行的寄生虫主要有三类，即线虫类、螨类和原虫类。常见的寄生虫有猪蛔虫、结肠小袋纤毛虫、食道口线虫、猪球虫、毛首线虫和疥螨，而且不少猪群的寄生虫感染还相当严重，给养猪生产造成巨大的经济损失。为了更好的做好驱虫工作，必须正确认识各类驱虫药物的作用特点，根据本猪场寄生虫的感染流行情况，合理选用驱虫药。 相似文献
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为查明盘锦地区规模化猪场猪肠道寄生虫感染情况,笔者应用直接涂片法、饱和食盐溶液漂浮法、水洗沉淀法、饱和蔗糖溶液漂浮法和改良抗酸染色法,对本地区10个规模化猪场不同年龄猪群的1050份粪便样品进行检查。结果显示,猪肠道寄生虫感染主要为猪蛔虫和毛首线虫,感染率分别为20.3%和17.2%。本研究为今后有效防治盘锦地区猪肠道寄生虫病提供了科学依据。 相似文献
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李连任 《畜牧兽医科技信息》2005,(3):74
在规模化养猪生产过程中，由于猪群的密度高、饲养量大，寄生虫容易流行传播。通常情况下，规模化养猪场感染流行的寄生虫主要有三类．即线虫类、螨类和原虫类。常见的寄生虫有猪蛔虫、结肠小袋纤毛虫、食道口线虫、猪球虫、毛首线虫和疥螨，而且不少猪群的寄生虫感染还相当严重，给养猪生产造成巨大的经济损失。为了更好的做好驱虫工作，必须正确认识各类驱虫药物的作用特点，根据本猪场寄生虫的感染流行情况，合理选用驱虫药。 相似文献
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焦子珍 《动物科学与动物医学》2005,22(8):59-60
在规模化养猪生产过程中，由于猪群的密度高、饲养量大，寄生虫容易流行传播。通常情况下，规模化养猪场感染流行的寄生虫主要有三类，即线虫类、螨类和原虫类。常见的寄生虫有猪蛔虫．结肠小袋纤毛虫、食道口线虫．猪球虫、毛首线虫和疥螨．而且不少猪群的寄生虫感染还相当严重，给养猪生产造成巨大的经济损失。为了更好的做好驱虫工作，必须正确认识各类驱虫药物的作用特点，根据本猪场寄生虫的感染流行情况，合理选用驱虫药。 相似文献
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在规模化养猪生产过程中,由于猪群的密度高、饲养量大,寄生虫容易流行传播。通常情况下,规模化养猪场感染流行的寄生虫主要有3类,即线虫类、螨虫类和原虫类。常见的寄生虫有猪蛔虫、结肠小袋纤毛虫、食道口线虫、猪球虫、毛首线虫和疥螨,而且不少猪群的寄生虫感染率还相当严重,给养猪生产造成巨大的经济损失。为了更好地做好驱虫工作,必须正确认识各类驱虫药物的作用特点,根据本猪场寄生虫的感染流行情况,合理选用驱虫药。 相似文献
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为了给辽宁省猪寄生虫病防治工作提供科学依据,随机抽检辽宁省不同区域规模化猪场和散养猪各150头,采用全身性寄生虫学剖检法和现场临诊检查相结合,调查发现辽宁省规模化猪场猪体内外寄生虫有17种,分别隶属于9纲14科16属,散养猪体内外寄生虫30种,分别隶属于9纲22科27属。确定辽宁省规模化猪场猪寄生虫优势虫种为:猪疥螨,猪蛔虫,猪毛首线虫,有齿食道口线虫,细颈囊尾蚴。散养猪优势虫种为:猪蛔虫,长刺后圆线虫,蛭形巨吻棘头虫,猪疥螨,细颈囊尾蚴,猪毛首线虫,有齿食道口线虫,结肠小袋虫。 相似文献
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应用饱和食盐溶液漂浮法、水洗沉淀法、饱和蔗糖溶液漂浮法、改良抗酸染色法等多种方法对河南地区所属的10个地市12个规模化养猪场、12个养猪小专业户及12个散养户的不同年龄猪群的1 210份粪便样品进行寄生虫检查。结果显示:猪肠道寄生虫中,球虫、蛔虫、类圆线虫、毛首线虫、结肠小袋纤毛虫、隐孢子虫等总感染率为40.08%,其中规模化猪场共采粪样1 010份,寄生虫感染率为36.44%;对养猪小专业户、散养户采取的200份粪样检查,寄生虫感染率为58.50%。结果表明:本省规模化猪场、养猪小专业户、散养户猪部分肠道寄生虫流行仍较严重,其防治工作任重道远。 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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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