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鸡关节炎型葡萄球菌病的感染门试验 总被引：5，自引：0，他引：5
通过多种途径实验研究，评定了分离自关节炎型病鸡病变关节的金黄色葡萄球菌对组织的亲嗜性以及病型与感染门的关系，关节内注射感染引起了典型的关节炎病毒；静脉注射感染除引起务症外，尚出现急性化脓性关节炎：皮下或肌肉注射感染的能致屋局部皮肤坏死，出血和蜂窝组织炎，介一般不致关节炎；气管内，气囊内或嗉囊内感染仅经避部轻度炎症或不能致病，因而推论，关节炎型葡萄球菌病很可能仅由特定菌株株经关节伤口感染才能引起。 相似文献
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鸡葡萄球菌病是由金黄色葡萄球菌或其他葡萄球菌感染所引起鸡的急性败血症或慢性关节炎、脐炎、眼炎、肺炎的传染病。其临床表现为急性败血症、关节炎、雏鸡脐炎、皮肤坏死和骨膜炎。雏鸡感染后多为急性败血症的症状和病理变化;中雏鸡病为急性或慢性;成年鸡患病多为慢性。雏鸡和中雏鸡病死率较高,因而该病是养鸡场中危害严重的疾病之一。1流行特点该病任何年龄的鸡都可感染, 相似文献
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葡萄球菌病是侵害家禽、哺乳动物和人的一种急性或慢性细菌性疾病。其特征是腱鞘、关节和滑液囊局部化脓、创伤感染、败血症、脐炎和细菌性心内膜炎。总结了鸡葡萄球菌病的流行特点、临床症状和综合防治技术。 相似文献
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蓝孔雀葡萄球菌病是由致病性金黄色葡萄球菌引起的急性或慢性接触性传染病。此病不分季节、年龄大小,主要造成蓝孔雀的脓毒败血症、严重下痢、局部化脓性炎症、关节炎等症状,使部分发病孔雀死亡,造 相似文献
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迪卡白种公猪肢蹄病的调查与蜂胶防治报告 总被引：3，自引：0，他引：3
本文对某工厂化养猪场的迪卡白种公猪40头进行了肢蹄病的观察、诊治和预防,结果:(1)在40头种公猪中发现32头患有不同程度的肢蹄病变(占80％)。在32头患猪中严重和有跛行的9头(占28.13％),前肢肢跡病17头(占53.13％),后肢肢蹄病29头(占90.63％);(2)所检出的肢蹄病按其发生部位和病变不同,共有26种之多。其中在蹄趾(指)部位的病变有蹄壁磨损、蹄踵腐损、蹄踵青肿、趾(指)间腐烂、趾(指)间增殖、蹄裂、假性蹄裂、趾(指)底腐损、蹄冠脓肿、白绒病等20种。在肢体关节部位的病变有腕关节皮肤磨损、感染化脓与关节炎、附关节皮肤磨损、化脓与关节炎等6种;(3)发病的主要因素是猪栏环境与地面的质地不良直接引起患部的磨损。继发感染的主要病原菌为坏死梭状杆菌和化脓棒状杆菌;(4)在防治方面采取以蜂胶为主的综合防治措施效果良好。 相似文献
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A G Gristina 《Science (New York, N.Y.)》1987,237(4822):1588-1595
Biomaterials are being used with increasing frequency for tissue substitution. Complex devices such as total joint replacements and the total artificial heart represent combinations of polymers and metal alloys for system and organ replacement. The major barriers to the extended use of these devices are the possibility of bacterial adhesion to biomaterials, which causes biomaterial-centered infection, and the lack of successful tissue integration or compatibility with biomaterial surfaces. Interactions of biomaterials with bacteria and tissue cells are directed not only by specific receptors and outer membrane molecules on the cell surface, but also by the atomic geometry and electronic state of the biomaterial surface. An understanding of these mechanisms is important to all fields of medicine and is derived from and relevant to studies in microbiology, biochemistry, and physics. Modifications to biomaterial surfaces at an atomic level will allow the programming of cell-to-substratum events, thereby diminishing infection by enhancing tissue compatibility or integration, or by directly inhibiting bacterial adhesion. 相似文献
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VA菌根真菌和覆膜对茄子黄萎病及茄根区微生物量的影响 总被引：6，自引：0，他引：6
本研究结果表明,侵染土著VA菌根真菌的茄子9号品种健株根区的革兰氏阴性细菌、放线菌和固氮菌数均显著大于其病株和另3个品种健株根区的这些菌数,而它的黄萎病发病率最低。自选VA菌根真菌Glomussp(C32)菌株接种侵染二敏茄,导致其根区微生物量的较大变化。侵染后,苗期根区细菌总数、革兰氏阳性细菌、固氮菌数显著减少,而革兰氏阴性细菌和放线菌数显著增加,结果后期除真菌外增加的更多。茄子黄萎病病情指数降低30％左右。覆膜处理促进了Glomussp(C32)菌株的侵染和茄菌根区微生物的发育,减少了对照根区革兰氏阴性细菌数,显著提高了对茄子黄萎病的相对防效。 相似文献
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There is evidence that the golden hamster (Cricetus auratus) is the animal of choice for the isolation of leptospirae, especially of the Leptospira canicola type since young guinea pigs and mice are resistant to infection and rats are entirely refractory. Both the classical strain, L. icterohaemorrhagiae and L. canicola on isolation have been found to produce a fatal infection in hamsters. The present report deals with the isolation of L. canicola in two instances by the injection intraperitoneally into hamsters of urine obtained from dogs ill with suspected leptospirosis. Each of the dogs was apparently the source of infection for a human case of Canicola leptospirosis. The classical strain L. icterohaemorrhagiae was isolated from the dog for the first time in the United States. In this instance the organism was isolated by injecting both whole blood and urine from the patient intraperitoneally into young hamsters. The injection into hamsters of suitable material from patients infected with L. canicola and L. icterohaemorrhagiae is followed by a fatal leptospirosis in the test animal. 相似文献
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大豆花叶病毒(SMV)种子传染率与品种间的抗性和SMV不同株系呈正相关,而与种子的褐斑粒率和种株的病情指数相关性极不显著。1号株系的种传病苗率高于2号和8号株系。高抗SMV种传的品种,能抗8个株系的传染。可以通过选育和筛选种传病苗率低的品种推广,减少本病的初次侵染来源。 相似文献
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Mycoplasma leachii was initially isolated from arthritic calves in South Queensland, Australia, and its ability to cause clinical polyarthritis in calves was demonstrated by experimental infection. However, the source of M. leachii infection in calves and its means of spreading are not well known. In this study, one-month-old calves were inoculated with cultures of M. leachii or joint fluid (collected from M. leachii-infected calves) through the intraarticular, intravenous, intratracheal, intranasal or oral routes. Multidisciplinary procedures, including clinical assessment, etiology assessment, pathology and immunohistochemistry (IHC), were used to evaluate the pathogenicity of M. leachii in calves and to elucidate the transmission route of M. leachii infection in calves. The results showed that all calves inoculated intraarticularly with cultured GN407 or joint fluid and two-thirds of the calves inoculated intravenously with joint fluid developed severe polyarthritis, and the M. leachii antigen was detected in the joints of all infected calves by IHC and PCR. In contrast, calves inoculated with cultured M. leachii or joint fluid through the intratracheal, intranasal or oral routes did not show any M. leachii infection in the clinical assessment, etiology assessment, or pathology and IHC results. These results indicated that polyarthritis caused by M. leachii in calves is transmitted via the blood route; however, this disease is not transmitted through the respiratory or digestive routes. In addition, the M. leachii antigen was not detected in the lungs of all the inoculated calves using IHC and PCR, indicating that M. leachii is not associated with pneumonia, even in the calves inoculated through the respiratory duct. These findings are important information for the prevention and control of calf polyarthritis caused by M. leachii. 相似文献
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Chronic arthritis in goats caused by a retrovirus 总被引：46，自引：0，他引：46
A virus was isolated from an adult goat with chronic arthritis and shown to belong to the retrovirus group by electron microscopy and biochemical methods. Inoculation of the virus into cesarean-derived specific-pathogen-free goats' kids produced arthritic lesions similar to those in the spontaneous disease. Vrus was reisolated from the experimentally induced lesions. 相似文献
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河南省部分地区鸡志贺氏菌病病原分离鉴定及药敏试验 总被引：3，自引：2，他引：1
为了对河南省部分地区鸡志贺氏菌病的病原进行分离鉴定和药物敏感性调查,对河南省6个地区的鸡腹泻病病料进行了细菌学检查,经细菌分离培养、形态染色镜检、生化试验和动物试验,共分离鉴定出12株鸡源志贺氏菌。血清学试验结果显示,分离菌株存在种和型的差异,其中8株为福氏志贺氏菌,3株为鲍氏多价志贺氏菌,1株为痢疾Ⅱ型志贺氏菌。动物试验结果表明,分离的12株鸡志贺氏菌均具有致病性,且毒力不同,其中,从三门峡分离的菌株有很强的毒力,发病率和死亡率均为100%。药敏试验结果显示,大多数鸡志贺氏菌对氨苄/舒巴坦和阿米卡星较为敏感,对其他药物具有严重的耐药性,且不同地区分离的鸡志贺氏菌对药物的敏感性不同。 相似文献
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Measurements of the inhibition of DNA synthesis in bacteria and the formation of thymine dimers by ultraviolet irradiation of the cells indicate that one thymine dimer per 350-IA strand of DNA acts as a block to further synthesis. In a sensitive strain of Escherichia coli the blocks are permanent. In a resistant strain the blocks are only temporary but recovery of synthesis is not the result of splitting dimers. 相似文献
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进行了中华鳖穿孔病病原菌嗜水气单胞菌（Ａｅｒｏｍｏｎａｓｈｙｄｒｏｐｈｉｌａ）和普通变形菌（Ｐｒｏｔｅｕｓｖｕｌｇａｒｉｓ）的人工感染、药敏和治疗试验。结果表明,两种菌经肌注、体表划痕法感染,均能使鳖表现出与自然病鳖相一致病症,两种菌均对庆大霉素、卡那霉素、诺氟沙星高度敏感。人工感染后第４天分别用硫酸庆大霉素、硫酸丁胺卡那霉素和复方诺氟沙星腹腔注射治疗,每１００ｇ体重剂量分别为１．２,４,１６ｍｇ／ｄ,连续４ｄ均能完全治愈。 相似文献