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广东地区鸭疫里默氏杆菌的分离鉴定及双重PCR检测方法的建立 总被引：2，自引：0，他引：2
对来自广东地区疑似鸭疫里默氏杆菌病的病鸭组织进行了病原菌的分离培养和生化鉴定,确定得到20株鸭疫里默氏杆菌,动物回归试验结果表明,分离的鸭疫里默氏杆菌具有很强的致病性.对这20株鸭疫里默氏杆菌进行的药敏试验表明,分离株已广泛产生耐药性.参照已经发表的2对引物以细菌全菌体为模板建立双重PCR方法,结果均能扩增出2条目的片段,经测序证实为鸭疫里默氏杆菌,而对鸭源大肠杆菌、鸭源禽多杀性巴氏杆菌、鸭源沙门菌和鸭源葡萄球菌的扩增结果均为阴性.说明建立的双重PCR方法能快速、准确的检测出鸭疫里默氏杆菌,并具有高度特异性,可用于鸭疫里默氏杆菌的快速鉴定和快速诊断. 相似文献
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对湖北荆州部分地区30例共118只疑似鸭传染性浆膜炎病死鸭的病料,经过病原菌分离培养和鉴定,共从病死鸭中分离到了75株典型的鸭疫里默氏杆菌;然后用15种常用抗菌药物的标准药敏纸片进行了常规药敏试验。结果显示:对该地区鸭浆膜炎病原高敏的药物有利福平、头孢他啶、头孢哌酮、头孢曲松和阿米卡星,中敏的有氟苯尼考、复方新诺明、粘杆菌素和强力霉素,低敏的有痢菌净、氟哌酸、环丙沙星、恩诺沙星和磺胺间甲氧嘧啶钠。将高敏药物和部分中敏药物组合进行临床应用,取得了较好的防治效果。 相似文献
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鸭疫里默氏杆菌培养特性的研究 总被引：1，自引：0，他引：1
鸭疫里默氏杆菌标准1型和2型与野毒株进行各种培养基培养特性的对比,并利用标准1型和2型菌株免疫的实验鸭鲜血制备成鸭疫里默氏杆菌鲜血平板,建立鸭疫里默氏杆菌鲜血平板实验室初步鉴别诊断法。结果表明:不同来源的鸭疫里默氏杆菌在显微形态、生化试验略有不同;不同培养基上鸭疫里默氏杆菌表现出不同的生长速度,不同来源的鸭疫里默氏杆菌在固体培养基上的菌落形态大小、显微形态略有不同;鸭疫里默氏杆菌鲜血平板能对标准1型、2型、鸭疫里默氏野毒株、大肠杆菌、巴氏杆菌及疑似里氏杆菌进行实验室的初步鉴别诊断。 相似文献
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《中国畜牧兽医文摘》2015,(4)
<正>鸭疫里默氏杆菌病(RA)又称鸭疫巴氏杆菌病、鸭败血症、鸭疫综合征、鸭传染性浆膜炎等,是由鸭疫里默氏杆菌引起的鸭的一种接触性、急性或慢性、败血性的传染病,是当前造成养鸭业经济损失的最主要的传染病之一,广泛分布于世界上各养鸭国家。2011年5月份山东省诸城市某养鸭专业户饲养的肉鸭,相继发生一种传染病,经流行病学调查、临床观察、病理剖检、病原分离鉴定、动物试验确诊为鸭疫里默氏杆菌病,经药敏试验选取敏 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