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１９９９年８－９月间，商丘市梁园区水池铺乡农户散养牛发生一种以高热稽留、血尿为特征的病例。该病呈点性散发，发病急、病程短、死亡率高，给养牛户造成很大的经济损失。经流行病学调查，临床症状、病理剖检及实验室检查，诊断为牛双芽巴贝西虫感染所致的一种寄生虫病。现报告如下： 一、发病情况。 先后发病的１６头病牛，均是３－５岁的母牛，在人工授精后１５天左右发病，最早的为授精后１２天，最迟的为授精后２０天；同时发现５例病牛体表有微小牛蜱寄生，１例病牛有牛皮蝇蛆寄生。其中５例病牛经乡村兽医用抗菌素、高糖、维生素等… 相似文献
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奶牛啤酒糟中毒的诊治陈美芳（江苏省南通市乳品厂２２６００８）１９９５年３月２８民我场大牛四组４头头胎怀孕牛发生以拉稀、少食、心律不齐为主要症状的疾病，前后十多天相继发病１６头，最先发病的２头病牛很快死亡，怀孕四个月内的２头病牛流产。报告如下：１临床症... 相似文献
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石歧杂雏鸡渗出性素质的治疗１发病情况定安县雷鸣镇养殖户王某饲养石歧杂鸡１４００只，２４日龄，约０．５公斤／只重。于１９９６年７月２９日早上喂料时，发现４只鸡精神不振，食欲减退，检查发现皮肤多处有紫红斑块，并且均在２４小时内陆续死亡。后来鸡群每天都有３... 相似文献
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黑鹳在人工饲养条件下的繁殖 总被引：2，自引：0，他引：2
１９８５年－１９９３年对黑鹳先后组成４对配偶，共产卵３２枚，受精卵１４枚，受精率４３．７５％，出雏８只，出雏率５７．４％，成活５只，成活率６２．５％。黑雏在笼养条件下，３岁龄性成熟。齐齐哈尔地区４－６月份产卵，一般窝产卵４枚，年最多产卵１６枚，孵化期３１天。黑鹳为晚成鸟。自然育雏在雏鸟出壳后３－４小时开食，人工育雏２４小时开食，１５日龄雏鸟开始生长初级飞羽羽鞘，２０－２５日龄能站立，３０－３５日龄 相似文献
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２００１年９月至２００２年５月我县舍饲肉牛发生两起放线菌病，病牛均为黄牛。现报道如下。１发病情况２００１年９月我乡吴屯村严某舍饲的３７头本地黄牛中有２头发病，鸾凤乡油溪村杭某２００２年４月２４日从河南引进的５９头肉牛于２００２年４月２８日～５月３日有２头南阳黄牛突然发病死亡，此后又有６头意大利皮埃蒙特与南阳黄牛杂交一代牛相继发病。２临床症状２头南阳黄牛病初表现为食欲不振、便秘、四肢无力、喜卧，３天后死亡。其余病例多以慢性经过，以特异性肉芽肿和慢性化脓灶为特征，表现为下颌肿大，肿胀界面明显，初期似… 相似文献
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小鼠输卵管卵卵龄对体外受精影响初探 总被引：1，自引：0，他引：1
本文用昆白小鼠不同卵龄的卵子作体外受精试验，结果表明，新排出的卵细胞尚未成熟，排卵后１－２小时基本成熟，３－４小时充分成熟，５小时后虽有较高受精率，但受精卵继续培养１０小时，大部分退化。 相似文献
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以禽巴氏杆菌病Ｂ２６－Ｔ１２００弱毒疫苗免疫后８小时即能产生免疫力（１／５鸡得到保护）；２－３天有３／５鸡获得保护；４－５天后能产生坚强免疫力（４／５－５／５保护），免疫后２，３，４和５个月的总保护率为８３．３％（８０／９６）；免疫后５个月，６批苗的平均保护率为７５％（１８／２４）。 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