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大黄鱼溶藻弧菌LPS的间接ELISA检测 总被引：9，自引：0，他引：9
用酚 水法从20dm3溶藻弧菌培养液中分离得到脂多糖(LPS)97.6mg,以0.5mg cm3的LPS溶液通过耳缘静脉注射免疫实验兔,经过3次加强注射后从颈动脉放血制备抗血清.该抗血清的效价为1∶2560,对副溶血弧菌等10株细菌的交叉反应效价都较低.用免疫吸附过滤法去除血清中的非特异性成分.用吸附后的抗血清进行溶藻弧菌间接ELISA检测,其检测限为97×104个 cm3.以ELISA进行大黄鱼体内溶藻弧菌检测.结果表明:用LPS抗血清可以较为灵敏地检测大黄鱼体内的溶藻弧菌,该方法不仅可以用于诊断大黄鱼的溶藻弧菌病,也可以检测无病症带菌大黄鱼. 相似文献
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【目的】通过药物体外抑菌试验及斜带石斑鱼抗病力研究,筛选有效治疗斜带石斑鱼(Epinephelus coioides)河流弧菌(Vibrio fluvialis)病复方中药与中西药联用配方。【方法】用黄连、乌梅、黄柏比例分别为0.9∶1.3∶0.9、1.2∶0.9∶1.0、1∶1∶1的复方中药对河流弧菌进行体外抑菌实验;将质量分数2.2%复方中草药与中西药联用复方分别添加到基础饲料中,投喂感染河流弧菌的斜带石斑鱼73 d,研究中西药对石斑鱼河流弧菌病治疗效果。其中,试验组Ⅰ、Ⅱ、Ⅲ的黄连、乌梅、黄柏比例分别为0.9∶1.3∶0.9、1.2∶0.9∶1.0、1∶1∶1,试验组Ⅳ、Ⅴ、Ⅵ的黄连、乌梅、黄柏、恩诺沙星配比分别为0.9∶1.3∶0.9∶1.3、1.2∶0.9∶1.0∶0.9、1∶1∶1∶1,另设空白对照组Ⅰ(健康鱼,投喂基础饲料)、Ⅱ(病鱼,投喂基础饲料)和阳性对照组Ⅲ(病鱼,投喂板黄散)、Ⅳ(病鱼,投喂大黄五倍子散)。【结果】黄连、乌梅、黄柏配比1∶1∶1、质量浓度200mg/mL的复方中药对河流弧菌的体外抑菌效果较佳,为最佳配方及用量。40 d病鱼死亡数,对照组Ⅱ对照组Ⅳ对照组Ⅲ试验组Ⅰ试验组Ⅲ试验组Ⅱ试验组Ⅴ试验组Ⅵ试验组Ⅳ对照组Ⅰ,试验组Ⅱ的黄连、乌梅、黄柏比1.2∶0.9∶1.0为疗效最佳的中药复方,试验组Ⅳ的黄连、乌梅、黄柏、恩诺沙星比为0.9∶1.3∶0.9∶1.3为疗效最佳的中西药联用复方。【结论】中药复方及中西药联用复方均可较好治疗斜带石斑鱼河流弧菌病,后者药效优于前者。 相似文献
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A fast and indirect fluorescnet antibody assay for the Vibrio alginolyticus and V.Parahaemolyticus infecting the large yellow croaker has been developed.The specific antisera for the two strains of vibrio were prepared with New Zealand rabbit and the antiserum and cross-reactive efficacy was tested by coagulation in tube.It showed that the goat anti-rabbit IgG had been labeled by fuorescence isothiocyanate(FITC).The results showed that positive reactions were 100% for the large yellow croaker Pseudosciaena crocea with typical symptom of vibrio infection,while the positive reaction to the pathogen in healthy yellow croakers reached 40%,but seemed negative for aquaculter water.The results demonstrated that this fast and indirect fluorescent antibody assay can be used not only to test the vibrio pathogen in diseased yellow croaker but also in infected animals with no symptom. 相似文献
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Non-specific immune response of bullfrog Rana catesbeiana to pathogenic Aeromonas hydrophila was studied to 60 individuals in two groups.Each bullfrog in bacterium-injected group was injected intraperitoneally(i.p.) with 0.2 ml bacterial suspension at a density of 5.2 × 106 CFU/ml,while each one in control group injected i.p.with 0.2 ml sterile saline solution(0.85%,w/v).Three bullfrogs in both groups were sampled at 0,1,3,7,11,15 and 20 days post-injection(dpi) for the evaluation of non-specific immune parameters.It was observed that intraperitoneal injection of A.hydrophila significantly increased the number of leucocytes and that of NBT-positive cells in peripheral blood.Significant increases in serum bactericidal activity and serum acid phosphatase activity were also observed in the bacterium-injected frogs when compared with those in the control group.However,a significant reduction was detected in vitro in phagocytosis activity of peripheral blood phagocytes.No significant difference in changes in the number of peripheral erythrocytes,serum superoxide dismutase(SOD) activity,and lysozyme activity was detected between the two groups.It is suggested that bullfrogs may produce a series of non-specific immune reactions in response to the A.hydrophila infection. 相似文献
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ＴｈｅｌａｒｇｅｙｅｌｌｏｗｃｒｏａｋｅｒＰｓｅｕｄｏｓｃｉａｅｎａｃｒｏｃｅａ (Ｒｉｃｈａｒｄｓｏｎ)ｉｓｏｎｅｏｆｔｈｅｍｏｓｔｉｍｐｏｒｔａｎｔｃａｇｅｆａｒｍ ｉｎｇｓｐｅｃｉｅｓｉｎｓｏｕｔｈｅｒｎＣｈｉｎａ.Ｉｎｒｅｃｅｎｔｙｅａｒｓ,ｔｈｅｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆｙｅｌｌｏｗｃｒｏａｋｅｒｃｕｌｔｕｒｅｈａｓｂｅｅｎｔｒｏｕｂｌｅｄｂｙｖｉｂｒｉｏｉｎｆｅｃｔｉｏｎｒｅｑｕｉｒｉｎｇｒｅｓｏｒｔｔｏｄｒｕｇｓ,ｔｈｅａｂｕｓｅｏｆｗｈｉｃｈｄｅｔｅｒｉｏｒａｔｅｓｔｈｅｍｉ… 相似文献
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采用3H-TdR同位素示踪方法研究了环境因子对溶藻弧菌对大黄鱼表皮粘液粘附作用的影响。试验结果表明,溶藻弧菌能很好地粘附于大黄鱼表皮粘液,其粘附量在菌浓度不超过6.52×108cfu/ml情况下随菌浓度的升高而升高;粘附量在25℃下孵育180min趋于饱和,在180min以内与孵育时间呈正相关关系;粘附作用在温度25—30℃、pH值偏酸、盐度35条件下较强;在无Na (盐度为0)时,无粘附作用;Ca2 能显著加强溶藻弧菌的粘附作用,而Mg2 作用不明显。这些结果表明,溶藻弧菌对大黄鱼表皮粘液有较强的粘附作用,其粘附作用受温度、盐度、pH值等环境因子的影响。 相似文献
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溶藻弧菌对大黄鱼表皮黏液的黏附特性研究 总被引：3，自引：0，他引：3
采用3H-TdR同位素示踪方法研究了溶藻弧菌对大黄鱼表皮黏液的黏附机制.试验结果表明溶藻弧菌经营养饥饿、热处理、抗体处理、蛋白酶及高碘酸处理后黏附作用明显下降;在8种碳水化合物的干扰下溶藻弧菌的黏附作用会有一定程度的变化,其中葡萄糖、果糖、甘露糖能明显促进溶藻弧菌的黏附作用;溶藻弧菌对大黄鱼表皮黏液中较大分子量的物质有较强的亲和力.这些结果表明溶藻弧菌对大黄鱼表皮黏液存在特异性黏附作用,这种黏附与细菌活力、其表面的蛋白类、糖类等物质以及黏液的化学组成都有密切关系. 相似文献