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猪大肠杆菌病是由致病性性大肠杆菌引起的传染性疾病,是危害养猪业的重要疾病之一,综述了猪大肠杆菌病的诊断和治疗方法,为防治猪大肠杆菌病提供思路。 相似文献
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鸡大肠杆菌病的诊断与防治 总被引:1,自引:1,他引:0
<正>鸡大肠杆菌病是由致病性大肠杆菌(Escherichia coli)所引起的一种传染病。主要表现为败血症、心包炎、肝周炎、气囊炎、输卵管炎、腹膜炎、大肠杆菌肉芽肿和全眼球炎等症状。鸡大肠杆菌病是危害养鸡业的重要细菌性疾病,发病率达30%~60%,病死 相似文献
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对一株分离自大黄鱼的致病性溶藻弧菌进行耐药性分析,分别用纸片扩散法、倍比稀释法检测了该菌对磺胺甲噁唑、氟苯尼考、盐酸多西环素、红霉素、盐酸环丙沙星、土霉素、恩诺沙星、硫酸新霉素、氨苄西林钠共9种药物的耐药性,同时用PCR法检测了该菌β-内酰胺酶基因bla CTX-M,喹诺酮类耐药基因(qnrVC,qnrVC5),四环素耐药基因(tetS、tetM)等耐药基因的携带情况。结果表明该菌对氨苄西林钠等药物耐药。对氟苯尼考、磺胺甲噁唑高度敏感。同时该菌携带bla CTX-M,qnrVC 2种耐药基因。本研究的结果为溶藻弧菌病的精准用药提供了数据支持。 相似文献
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为确定绿鳍马面鲀烂嘴症的致病菌及筛选敏感药物,通过平皿划线法将患病组织内的细菌进行分离纯化,得到1株优势菌,命名为QZG3。该菌株在硫代硫酸盐柠檬酸盐胆盐蔗糖琼脂(TCBS)弧菌选择性培养基上为绿色、圆形、黏稠状菌落,经革兰氏染色判断为革兰氏阴性菌;对该菌株的16S rRNA基因进行测序、鉴定,并经系统进化树分析,发现该菌株与阿尔法克弧菌(Vibrio alfacsensis)聚为1支,因此判断该菌株为阿尔法克弧菌。人工回感试验表明,该菌株为绿鳍马面鲀烂嘴症的致病菌;药敏试验结果显示,该菌株仅对氟苯尼考、恩诺沙星两种抗生素高度敏感,对土霉素、青霉素、头孢氨苄、庆大霉素、卡那霉素、四环素以及红霉素均表现出耐药性。因此建议养殖生产上选用氟苯尼考和恩诺沙星进行药物防治。 相似文献
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对豫北地区嗜水气单胞菌引起的细菌性败血病进行流行病学调查,分离鉴定致病性嗜水气单胞菌菌株,并对致病性嗜水气单胞菌菌株进行毒力验证和药敏试验。采集4个养殖场病鱼标本及水样,每月进行流行病学调查,利用生理生化及分子生物学方法检测嗜水气单胞菌的分布状况。结果显示,筛选出52株为嗜水气单胞菌,其中32株为致病性嗜水气单胞菌,20株为非致病性嗜水气单胞菌,且致病性嗜水气单胞菌主要分布在7—9月份,毒力验证试验表明,32株致病性菌株的毒力大小差异明显,筛选出强毒株XDMG(4),为后期试验的疫苗株做准备;药敏试验表明,不同菌株对同一种药物的药敏结果不同,但大部分药物的药敏结果基本一致,70%以上的致病性菌株对头孢哌酮、氟本尼考、菌必治、阿米卡星等抗菌药物表现为高度敏感,对青霉素类药物表现为高度耐药性,耐药率达100%,对氨基糖苷类(不包括阿米卡星)、磺胺类、四环素等药物呈现不同程度的耐药性,具有多重耐药性。本试验旨在丰富本地区的鱼类细菌性败血病的病原资料,并为该菌引起的人类疾病的防控提供科学依据。 相似文献
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从患"红头病"黄颡鱼Pelteobagrus fulvidraco的肝、肾等组织中分离出致病菌,通过人工感染试验、生化鉴定及16S r RNA序列分析进行鉴定,采用K-B琼脂法进行药敏试验。结果表明:分离获得的优势菌株HHG有很强的致病性,鉴定为芽孢杆菌Bacillus cereus;该菌株对丁胺卡那、米诺环素、恩诺沙星3种抗生素高度敏感;对中庆大霉素、卡那霉素、新霉素、头孢哌酮等10种抗生素中度敏感,对头孢曲松、利福平和链霉素3种抗生素低度敏感,而对青霉素、苯唑西林、氨苄西林等14种抗生素具有耐药性。本研究结果可为有效防控黄颡鱼"红头病"提供参考。 相似文献
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Leone L. Mohney Donald V. Lightner Rodney R. Williams Michael Bauerlein 《Journal of the World Aquaculture Society》1990,21(3):186-191
Nauplii of the brine shrimp, Artemia , and cultures of the soil nematode, Panagrellus redivivus , were fed a suspension of the water-insoluble antibacterial Romet-30 (sulfadimethoxine plus ormetoprim) to determine if they could be used as a mechanism for delivery of the drug to larval penaeid shrimp.
Romet-30 was added to groups of brine shrimp nauplii and nematodes in 1 L beakers to achieve a concentration of 3 mg of drug per ml of seawater. After a 4 h uptake period, predetermined numbers of organisms were assayed for antibiotic content using the micro-plate diffusion method and a Romet-30 sensitive strain of Vibrio alginolyticus as the indicator. The resulting zones of inhibition were compared to that of a standard Kirby-Bauer sensitivity disc containing 25 μg of the drug that was placed on each plate as standard control. Negative controls consisted of equal numbers of nauplii and nematodes that were not exposed to the antibiotic. Artemia nauplii and nematodes accumulated approximately 0.1 μg of the drug per nauplius and approximately 0.25 μg per nematode. They exhibited no signs of toxicity from exposure to the drug and contained the antibiotic in sufficient quantity to provide a theoretical therapeutic dose of the drug when fed to penaeid larvae.
In subsequent tests, normal and diseased larval Penaeus stylirostris readily accepted Romet-30 enriched Artemia . Diseased larvae fed the drug in this manner exhibited a statistically greater overall survival and a greater survival to the post-larval stage by Student's t -test at the 5% significance level. 相似文献
Romet-30 was added to groups of brine shrimp nauplii and nematodes in 1 L beakers to achieve a concentration of 3 mg of drug per ml of seawater. After a 4 h uptake period, predetermined numbers of organisms were assayed for antibiotic content using the micro-plate diffusion method and a Romet-30 sensitive strain of Vibrio alginolyticus as the indicator. The resulting zones of inhibition were compared to that of a standard Kirby-Bauer sensitivity disc containing 25 μg of the drug that was placed on each plate as standard control. Negative controls consisted of equal numbers of nauplii and nematodes that were not exposed to the antibiotic. Artemia nauplii and nematodes accumulated approximately 0.1 μg of the drug per nauplius and approximately 0.25 μg per nematode. They exhibited no signs of toxicity from exposure to the drug and contained the antibiotic in sufficient quantity to provide a theoretical therapeutic dose of the drug when fed to penaeid larvae.
In subsequent tests, normal and diseased larval Penaeus stylirostris readily accepted Romet-30 enriched Artemia . Diseased larvae fed the drug in this manner exhibited a statistically greater overall survival and a greater survival to the post-larval stage by Student's t -test at the 5% significance level. 相似文献