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奶牛破伤风病,在上海地区规模化养殖牧场极少发生。2017年7月,我中心接报某奶牛场6头青年母牛陆续死亡,年龄在6-16月龄之间,患牛病程短,死亡率极高,场主高度怀疑为传染病致死。病牛精神沉郁,体温多数正常,仅在后期快速升高,基本无食欲,并表现出瞬膜外露、颈背僵硬、尾部震颤等神经类症状。由于病因不明,初期症状不明显,牧场兽医采取普通抗生素治疗,效果不佳。通过紧急流行病学调查、临床症状鉴别、病理解剖等方法,临床诊断为奶牛破伤风梭菌感染。经采取破伤风抗毒素治疗、镇静解痉和强心补液等标本兼治措施,结合抗生素、中药灌服等辅助治疗,发病症状逐渐缓解,大部分病牛在一周左右基本痊愈,未出现新的死亡病例。 相似文献
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某大型奶牛场接种产气荚膜梭菌-巴氏杆菌二联苗将近2个月后,相继出现五头奶牛突发致死的病例.奶牛发病当天无任何征兆,突然倒地,两眼呆直,受到刺激后发生抽搐,而后很快死亡.根据临床症状初步怀疑为产气荚膜梭菌所导致的猝死病例.取死亡奶牛肺脏组织和一段肠道样品进行实验室检查.通过细菌培养,运用多重PCR进行分型鉴定,结果均为A... 相似文献
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正2017年7月,本市一牛场突然发生奶牛陆续死亡,根据发病情况、临床症状和实验室检测,疑似为牛破伤风。现将诊治过程汇报如下。1发病情况和临床症状牛场共饲养330头奶牛,6月20日该场兽医对16月龄左右的牛实施断尾术。从7月3日开始,曾实施断尾术的牛陆续出现急性死亡,共发病9例,死亡6例。患牛临床表现为精神沉郁,脖子僵硬,瞬膜突出(图1),有的体温升高。1周后复诊发现有的病牛 相似文献
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1991年7月下旬至9月上句,合肥奶牛场奶牛发生了一种以急性、发热为特征的传染病。根据临床症状、流行特点和实验室诊断,确诊为牛流行热。现将情况报告如下。一、发病情况 1991年7月24日,合肥奶牛场二号牛舍一头成年母牛出现体温升高、流鼻涕等症状,次日夜同舍12头奶牛出现类似症状。7月26日,全场三幢大牛舍、四幢育成牛舍和一幢小牛舍的牛均有程度不同的发病。8月18日 相似文献
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《养殖与饲料.饲料世界》2019,(12)
猪破伤风病是由破伤风梭菌感染伤口而引发的以肌肉痉挛和神经症状为主要表现的细菌性疾病;病原可产生毒性较强的外毒素,对肌肉和神经系统造成伤害,本病一年四季都可发生,环境中的梭菌通过体表伤口感染;预防本病必须加强猪场的管理,减少猪受外伤机率,有伤口的猪及时对受伤部位消毒处理;治疗本病需对感染伤口进行清洗消毒,必要时注射破伤风抗毒素,临床表现严重的还要对症用药,治疗期间应加强病猪的护理。 相似文献
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2005年9月,内蒙古包头市某奶牛场,妊娠母牛群中,未见任何前躯症状而突然死亡2头奶牛。经频死症状、病理剖解变化和实验室诊断,确诊为急性肠毒血症,该病是由魏氏梭菌在奶牛的肠道中大量繁殖,产生毒素而引起奶牛的一种急性毒血症。现将情况报告如下。1发病情况该奶牛场,存栏奶牛307头,其中犊牛24头,妊娠母牛85头,泌乳母牛110头,干奶母牛46头。采用散放式的饲养模式,精饲料由饲料生产厂家直接供应,粗饲料为优质压块苜蓿及玉米青贮,按奶牛不同生理阶段供应日粮,偶尔割些青嫩苜蓿饲喂。2005年9月28日下午,在妊娠母牛群中突然死亡2头,死前奶牛呼吸… 相似文献
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生产瘫痪,又称产后瘫痪、乳热症,是母畜产后突然发生的一种急性神经机能障碍疾病。其特征是咽、舌、肠道麻痹、体温下降、感觉减退、四肢瘫痪。如治疗不及时或误诊,则造成持续瘫痪,导致奶牛淘汰。近来,我们对武汉某奶牛场8头患生产瘫痪的奶牛进行诊治,效果理想,现将有关情况报告如下:1基本情况武汉某奶牛场饲养中国荷斯坦奶牛100头,其中成母牛60头,集中在一栋牛舍饲养,青年牛22头,犊牛18头,分别饲养于不同牛舍。每头成母牛日喂混合精料5~10kg、青贮料5kg、稻草5kg、青杂草15kg、糟渣料(主要为啤酒糟)10kg。2临床症状该场先后有8头牛发病,时… 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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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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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