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1.
中药制剂对牛大肠杆菌病的治疗试验 总被引：1，自引：0，他引：1
王箭 《畜牧兽医科技信息》2008,(9)
牛大肠杆菌病是由病原性大肠杆菌引起的一类多发性、致死性肠道传染病。目前用于防治大肠杆菌病的药物多为抗菌药,由于抗菌药在使用过程中,不仅杀灭了致病菌,而且也破坏了机体原有的正常菌群,导致微生态平衡的破坏,进而 相似文献
2.
王箭 《畜牧兽医科技信息》2008,(9)
牛大肠杆菌病是由病原性大肠杆菌引起的一类多发性、致死性肠道传染病.目前用于防治大肠杆菌病的药物多为抗菌药,由于抗菌药在使用过程中,不仅杀灭了致病菌,而且也破坏了机体原有的正常菌群,导致微生态平衡的破坏,进而增加了机体对外源感染的敏感性,同时由于长期使用抗菌药物,病原菌产生耐药性,收效甚微,此外长期使用造成的药物残留给动物及动物产品消费者的人类健康带来了危害,为此,我们研制了中药制剂,进行了大肠菌的分离鉴定,对分离菌株人工感染牛大肠杆菌引起的腹泻进行了治疗试验,旨在为防治牛大肠杆菌病菌开发新的治疗药物. 相似文献
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由大肠杆菌引起的仔猪腹泻会导致机体水分和电解质大量丧失而导致机体衰弱,甚至死亡,其发病机理复杂,危害性大,是困扰养猪生产、影响养猪经济效益的棘手问题之一.
1 病因①环境因素:气候多变、阴雨潮湿、饲养密集、通风不良等因素,都可引起仔猪产生应激.②病原因素:主要是产毒型大肠杆菌,由于吸附在粘膜表面进行繁殖并产生毒素,引起小肠分泌液体,导致腹泻.③仔猪自身因素:初生仔猪胃腺发育尚不完善,分泌胃酸机能很弱,胃内缺乏游离盐酸,唾液和胃蛋白酶的分泌不足,抑制细菌繁殖的能力较弱,在此期间大肠杆菌极易在胃中增殖并进入肠道而引起发病. 相似文献
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仔猪黄痢也称为新生仔猪大肠杆菌病，是初生仔猪的急性、高致死性传染病。仔猪黄痢是由不同大肠杆菌血清型引起的，受地域、饲养管理等因素的影响导致仔猪出生后1周内排黄色或黄棕色稀粪的“黄痢”。主要发生于1周内的仔猪，特别是1～3日龄发病最多，随日龄的增长发病减少，1周龄以上很少发病。由于仔猪抵抗力差，黄痢引起迅速脱水，导致仔猪各器官衰竭而死亡，病死率高，有的达100％。 相似文献
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新生仔猪腹泻是引起刚出生仔猪死亡的常见原因，也是养猪场较难控制的疾病之一，引起新生仔猪腹泻的原因很多，而由产肠毒素大肠杆菌（ETEC）所引起的新生仔猪大肠杆菌病（也称仔猪黄、白痢）是最为常见的腹泻病之一，给养猪业造成极大危害和经济损失。仔猪黄痢又称早发性大肠杆菌病， 相似文献
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猪大肠杆菌病是由致病性埃希氏大肠杆菌的某些血清型所致疾病的总称。不同品种、日龄的猪均可发病，以仔猪最易感染。近年来，养猪规模迅速发展，但由于饲养条件较差等原因，仔猪大肠杆菌病发病率明显上升，鉴于大肠杆菌的耐药性日趋严重，目前很多抗菌药物都不能有效控制猪群的大肠杆菌病，而氟苯尼考仍然是目前临床上治疗猪大肠杆菌的有效药物。但氟苯尼考不溶于水，利用率低， 相似文献
7.
谈鹏 《畜牧兽医科技信息》2013,(3):74-75
仔猪大肠杆菌病是由病原性大肠杆菌引起的一类传染病,由于病原性大肠杆菌类型的不同,以及猪年龄、个体以及生理机能的差异,因而发生不同的疾病。本病对新生仔猪危害很大,常常带来严重损失。1病原及发病原理大肠杆菌是肠杆菌科、埃希氏菌属各种血清型的埃希氏 相似文献
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<正>1新生仔猪大肠杆菌性腹泻腹泻是仔猪最易发病之一,仔猪腹泻给生猪养殖业造成了严重的损失。养殖场遇到仔猪腹泻常怀疑是何种病毒引起的,往往忽略了致病性大肠杆菌。在2010～2011年,很多猪场暴发了仔猪腹泻,养殖场针对检测结果按照新生仔猪大肠杆菌性腹泻进行预防和治疗,效果良好。所以,必须重视大肠杆菌引起的临床发病。1.1病原与分类新生仔猪大肠杆菌性腹泻的病原为肠毒素性大肠杆菌, 相似文献
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仔猪大肠杆菌病是一种急性传染病,主要是由于感染致病性大肠杆菌而导致,在仔猪不同的生长期均可发生,对生猪养殖业威胁较大。1仔猪大肠杆菌病流行性特点仔猪之所以会患上大肠杆菌病,其中病猪和带菌猪是主要传染源,这些体内有大肠杆菌的猪所排出的粪便中有大量的大肠杆菌,这些病菌将会对水源、饲料以及母猪的乳头和皮肤等部位产生不同程度的污染。仔猪吃奶或者是舔舐母猪时,病菌就可能进入到仔猪的消化道,然后导致仔猪患上大肠杆菌病。 相似文献
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仔猪大肠杆菌病是一种急性传染病,主要是由于感染致病性大肠杆菌而导致,在仔猪不同的生长期均可发生,对生猪养殖业威胁较大。1仔猪大肠杆菌病流行性特点仔猪之所以会患上大肠杆菌病,其中病猪和带菌猪是主要传染源,这些体内有大肠杆菌的猪所排出的粪便中有大量的大肠杆菌,这些病菌将会对水源、饲料以及母猪的乳头和皮肤等部位产生不同程度的污染。仔猪吃奶或者是舔舐母猪时,病菌就可能会进入到仔猪的消化道,然后导致仔猪患上大肠杆菌病。 相似文献
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选择中国大陆最早分离的H9N2亚型禽流感病毒(avian influenza virus,AIV)A/Chicken/Guangdong/SS/94(H9N2)(缩写为SS株)和1998年大流行时期分离的H9N2亚型AIVA/Chicken/Shanghai/F/98(H9N2)(缩写为F株)为研究对象,对其在SPF鸡体内的复制能力和传播途径特性比较后发现,F株在4周龄SPF鸡气管中的复制能力高于SS株,F株可以经气溶胶传播途径传播,SS株不能经气溶胶传播途径传播;利用反转录-聚合酶链反应(RT-PCR)方法获取F株和SS株的HA和NA基因的cDNA,序列分析得知,F株和SS株的HA和NA基因的同源性分别是96.6%和98.1%;HA基因的裂解位点氨基酸序列都是PARSSR↓GL,但有5个氨基酸的差异,即166位N(F)→D(SS)、198位A(F)→V(SS)、217位V(F)→I(SS)、335位G(F)→R(SS)、504位L(F)→S(SS);2株病毒的NA基因在63~65位都存在氨基酸缺失,但在NA基因红细胞吸附位点的氨基酸序列不同,分别是IKKDSRSG(F)和IKEDLRSG(SS)。F株和SS株的传播特性差异是否与其表面基因序列有关,有待进一步研究。 相似文献
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禽类的起源、演化及我国主要家禽品种类型与分布 总被引：1，自引：1，他引：0
家禽是重要经济价值动物.本文从禽类种群进化学说出发,简介了禽类的起源、演化、动物学分类和家禽的驯化(养)与品种的形成,并对我国主要家禽(鸡、鸭、鹅)地方品种和培育品种(配套系)的分布与类型作了描述,以期为研究我国家禽起源系统,保护与利用我国家禽品种,促进家禽生产可持续发展提供参考. 相似文献
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近年以来,由于市场因素的刺激,生猪的存养量大幅上升,再加上由于流通环节较多,流通非常频繁,流通距离越来越远。这对繁荣经济,增加养殖效益起了重要的推动作用,但也同时给疾病的感染和传播创造了有利条件,给猪病的防治带来了困难。有的猪场感染了传染病后,由于治疗不及时不得法,而造成了惨重的经济损失。2008年7月中旬,我街道一养猪户因盲目从外地购进中猪,发生猪病疫情,引起猪只连续死亡,造成一定的经济损失。根据流行病学、临床症状、剖检变化和实验室诊断,诊断该病为猪链球菌病和猪伪狂犬病混合感染,现报告如下。 相似文献
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１前言１．１鸡白冠病鸡白冠病是由卡氏住白细胞原虫寄生于鸡的红细胞和单核细胞而引起的鸡的贫血性疾病。吸血昆虫蚋和库蠓叮咬鸡引起传播，是主要的传播媒介，一般在夏末和秋季多发，由于夏季降雨量较大，部分沟渠积水，库蠓和蚋多孳生，因此在多雨水涝的年份发病率明显增高。１９９８年中国从南到北发生洪涝灾害，吸血昆虫的孳生格外严重，出现了一个白冠病多发年，而后两年发病稍轻，并有地区性，今年８月中旬以来白冠病的发病呈抬头趋势，有一定的死亡率，对蛋鸡产蛋率也会引起一定程度的降低，应引起养鸡户的重视。１．２鸡痘鸡痘也是… 相似文献
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Pinard CL Weiss ML Brightman AH Fenwick BW Davidson HJ 《American journal of veterinary research》2003,64(1):104-108
OBJECTIVE: To evaluate lactoferrin and lysozyme content in various ocular glands of bison and cattle and in tears of bison. SAMPLE POPULATION: Tissues of ocular glands obtained from 15 bison and 15 cattle and tears collected from 38 bison. PROCEDURE: Immunohistochemical analysis was used to detect lysozyme and lactoferrin in formalin-fixed, paraffin-embedded sections of the ocular glands. Protein gel electrophoresis was used to analyze ocular glands and pooled bison tears by use of a tris-glycine gel and SDS-PAGE. Western blotting was used to detect lactoferrin and lysozyme. RESULTS: Immunohistochemical staining for lactoferrin was evident in the lacrimal gland and gland of the third eyelid in cattle and bison and the deep gland of the third eyelid (Harder's gland) in cattle. Equivocal staining for lactoferrin was seen for the Harder's gland in bison. An 80-kd band (lactoferrin) was detected via electrophoresis and western blots in the lacrimal gland and gland of the third eyelid in cattle and bison, Harder's glands of cattle, and bison tears. An inconsistent band was seen in Harder's glands of bison. Lysozyme was not detected in the lacrimal gland of cattle or bison with the use of immunohistochemical analysis or western blots. Western blots of bison tears did not reveal lysozyme. CONCLUSIONS AND CLINICAL RELEVANCE: Distribution of lactoferrin and a lack of lysozyme are similar in the lacrimal gland of cattle and bison. Differences in other tear components may be responsible for variability in the susceptibility to infectious corneal diseases that exists between bison and cattle. 相似文献
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Harvey CE 《Journal of veterinary dentistry》2002,19(4):186-195
Crown width, height and buccal surface areas were measured on heads or skulls of four dogs and four cats, and were compared with similar measurements on models of human dentition. Buccal surface area variability was greater in dogs and cats than in humans, and teeth of cats were smaller. Horizontal (gingival and occlusal halves) and vertical (mesial, middle, and distal thirds) buccal surface area variability was also greater in canine and feline teeth compared with human teeth. This increased variability suggests the need for testing of reliability and repeatability of scoring when using plaque and calculus indices based on horizontal or vertical segmentation. Buccal surface area variability between teeth also prompts questioning the validity of equal weighting of smaller, irregularly-shaped teeth when calculating a mean mouth score. Whether equal or more reliable results would be obtained from scores of whole teeth in comparison with segmentation indices used currently has yet to be determined. 相似文献
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Over a period of about 12 years, 30 abnormal Schistosoma mattheei cercariae were found among a total of approximately 2.8 million examined. Initially seven were recovered from about 1.02 million (0.0007%), which were examined individually while being counted with the aid of a stereoscopic microscope. Subsequently, on the strength of relatively high percentages of abnormal individuals recovered when counting cercariae that failed to penetrate into oxen, it appeared that the morphologically abnormal cercariae were unable to swim and would mostly sediment out of a suspension while most of the normal cercariae would remain swimming. This surmise is supported by recovery of 23 morphologically abnormal cercariae (0.001%) from about 1.8 million, by examining the sediment after the cercarial suspension had been left standing undisturbed in glass measuring cylinders. The abnormalities ranged from aberrant tails only (e.g. an underdeveloped tail, or different degrees of schism) or aberrant heads only, to abnormalities of both the heads and tails. A suggested schematic classification of abnormal cercariae is presented. A young, adult hamster was exposed to eight S. mattheei cercariae with complete schism of the shaft of the tail, by pipetting the cercariae onto the shaved abdominal skin of the anaesthetised animal. Two underdeveloped females were subsequently encountered in squash preparations of the liver when the hamster was killed for worm recovery 10 weeks after infection, thus showing that some of the abnormal cercariae were viable. A method is also described for killing and fixing cercariae while retaining some of the shining brilliance of live cercariae, without them becoming shrivelled, granular and semi-opaque, as occurs when cercariae die spontaneously or are killed with heat. This is apparently the first report of abnormal cercariae of S. mattheei. In addition, a method of concentrating abnormal cercariae after emergence from a snail, a schematic classification of abnormal cercariae and a method for killing and fixing cercariae while retaining much of the shiny brilliance of live cercariae are also reported for the first time as far as is known. 相似文献