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1、竖鳞病
病原体：水型点状假单胞菌
流行情况：该菌是水中常在菌，是条件致病菌，当水质污浊、鱼体受伤时经皮感染。主要危害鲤鱼、鲫鱼、金鱼、草鱼，鲢鱼有时也会患此病。该病主要发生在春季，有时在越冬后期也有发生。 相似文献
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念珠菌病是一种机会致病菌,该菌存在于人和动物消化道、呼吸道和泌尿生殖道黏膜,当饲养环境下降时可诱发该病的发生,该病多侵害雏禽,主要多发生在高温高湿的夏秋季节,发病率和死亡率均较高,常给养殖户造成一定经济损失。就鸡念珠菌病的流行特点、临床症状、病理变化等方面进行概述,以期为念珠菌病的防控提供参考。 相似文献
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本文报道了对鳖的“红底板病”致病菌的研究,确认其致病菌为气单胞菌属(Aeromonassp),并进行了药敏试验,提出了治疗该病的有效药物。 相似文献
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<正>鸡大肠杆菌病是由大肠杆菌某些血清型菌株引起的一类疫病的总称。大肠杆菌是鸡体肠道内常在菌群的一种条件性致病菌。各个品种和日龄的鸡均可发病,但雏鸡最易感。该病一年四季均可发生,尤以冬季及夏季多发。该病的发生与饲养管理水平、饲养方式有着密切的关系。表现为败血症、气囊炎、肝周炎、心包炎、脐炎、关节炎、 相似文献
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广东省罗非鱼及其养殖环境中食源性致病菌菌相分析 总被引：1，自引：0，他引：1
对广东省3个不同产区罗非鱼及其养殖环境中食源性致病微生物的构成进行了分析。采用选择性培养基、生物梅里埃微生物鉴定系统与Biolog微生物自动化鉴定系统相结合的方法对罗非鱼和养殖环境中的主要食源性致病菌种类进行分离鉴定。结果表明：罗非鱼鱼体及其养殖环境中存在的主要食源性致病菌种类,随季节的不同而有变化,其中以夏季致病菌种类最多,鱼体及其养殖环境分别为11和12种致病菌;而春季鱼体中致病菌较少,为6种。罗非鱼鱼体及其养殖环境中以致病性嗜水气单胞菌、致泻大肠埃希氏菌、沙门氏菌最为常见,四季均有,其中致病性嗜水气单胞菌以春夏季节检出率较高,环境中检出率达83％～89％,鱼体中达44％～67％;致泻大肠埃希氏菌环境中春夏秋季检出率达83％～100％,鱼体夏秋季中达48％～67％;沙门氏菌环境中春秋季检出率达33％～39％,鱼体中达44％～52％。其次在罗非鱼鱼体还分离到霍乱弧菌、副溶血性弧菌、创伤弧菌、阴沟肠杆菌、阪崎肠杆菌、铜绿假单胞菌和恶臭假单胞菌等致病菌。 相似文献
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叙述了青蛙、克氏原螯虾、乌龟、河蟹、黄鳝和泥鳅对钉螺和蚊幼的摄食对比实验，结果表明，它们每天摄食多少顺序为：对钉螺、克氏原螯虾＞乌龟＞河蟹＞青蛙；对蚊纹，乌龟＞克氏原螯虾＞泥鳅＞黄鳝或青蛙＞河蟹，在疫区对金钱蟹和克氏原螯虾进行摄食钉螺的定性观察发现：在放养了实验动物的生态小区内，钉螺种群数量明显减少，通过本实验和近8的年来的研究工作，形成了四种水生动植物净化疫水的生态经济模式；1）芋、蛙、鳝、鳅、蚓、菜；2）莲、菜、龟或鳖、鳝、鳅；3）莲藉、河蟹、泥鳅；4）芦伟或荻、克氏原螯虾或沼虾、泥鳅。 相似文献
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Sergio E Pasteris Germán Roig Babot María C Otero Marta I Bühler & María E Nader-Macías 《Aquaculture Research》2009,40(14):1605-1615
This work addresses the selection of potentially probiotic lactic acid bacteria (LAB) to be used in raniculture. Thus, strains belonging to the genera Pediococcus pentosaceus, Leuconostoc mesenteroides, Lactococcus lactis and Enterococcus faecium isolated from a Rana catesbeiana hatchery were evaluated for their inhibitory properties against RLS-associated pathogens ( Proteus vulgaris, Pseudomonas aeruginosa, Staphylococcus epidermidis ) and food-borne bacteria. Cell-free supernatants of LAB strains inhibited the growth of at least one of the pathogens by organic acids, but L. lactis CRL 1584 also produced a bacteriocin-like metabolite. The ability of LAB strains to produce H2 O2 in MRS+TMB medium was also studied. Seventy-eight to ninety six per cent of the strains showed some level of H2 O2 production. Moreover, different organic solvents were used to determine the hydrophobicity and Lewis acid/base characteristic of LAB strain surfaces. Most of the strains presented hydrophilic properties, but no acidic or basic surface characters. However, some strains isolated from the skin showed a high degree of hydrophobicity and basic components in the cell surface due to their adhesion to chloroform. These properties were not observed in LAB from balanced feed and freshwater. Taking into account general guidelines and the beneficial properties studied, five strains were selected as potential candidates to be included in a probiotic for raniculture. 相似文献
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从患病牛蛙(Rana catesbeiana)肝脏、四肢、腹水等组织划线分离,共获得3株菌,通过对菌落形态观察、革兰氏染色镜检及生理生化鉴定,确认其理化性质一致,均为洛菲不动杆菌(Acinetobacter lwoffi)。采取腹部注射和浸泡两种不同方式人工感染试验均证实该菌存在致病性,药敏试验表明,分离菌株W2011-01对左氟沙星、美洛培南、哌拉西林/他唑巴坦、妥布霉素、复方新诺明、庆大霉素等18种药物敏感,对呋喃妥因、环丙沙星、沙拉沙星、乙酰螺旋霉素、青霉素、杆菌肽、痢特灵、利福平、氨苄西林、强力霉素耐药。 相似文献
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利用稻田养殖美国青蛙，放养平均重５０ｇ的幼蛙，经过４个月的养殖，平均规格达２５０ｇ，亩产２２０ｋｇ，成活率８５％，水稻亩产４０７ｋｇ，每亩收入４８１８元。试验表明，稻田养蛙生态农业确实可行。 相似文献
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Rana catesbeiana tadpoles were exposed to gas supersaturated water which resulted in inflation of the gastrointestinal tract with gas. Affected tadpoles floated on the surface, either with their left sides elevated or on their backs. These clinical signs, similar to those of gas bubble disease, could be reversed by reducing the dissolved gas levels. Based on post-exposure observation for 30 days, a 4-day exposure to a ΔP of 160 to 170 mm Hg had no effect on survival. A 10-day exposure increased mortality and the levels of systemic Aeromonas hydrophila bacteria, the etiology of a serious amphibian disease, “Redleg”. Bacterial levels returned to control levels after a 6-day recovery period. 相似文献
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为探究海带(Saccharina japonica)生活史孢子体、配子体不同阶段的附生菌群落结构的差异,采用Illumina测序技术,分析了种海带(S1)、配子体(S2)、幼孢子体(S3)和大孢子体(S4)这4个不同阶段的藻体上附生菌16S rRNA序列,研究其附生菌群落结构。结果显示,4个阶段共识别出23门156属共244个操作分类单元(OTU)。从门分类上来说,变形菌门(Proteobacteria)在海带各阶段中均表现出较高的丰度,在S1、S2、S3和S4藻体样本中相对丰度分别达53.0%、94.3%、77.2%和36.7%,蓝细菌门(Cyanobacteria)只在S4藻体样本中表现出较高的丰度,为43.8%;从属分类上来说,假交替单胞菌属(Pseudoalteromonas)在各样本间差异较大,S2、S3和S4样本中相对丰度分别为65.00%、44.88%和25.57%,但在S1样本中仅为0.18%。各样品间附生菌群落结构差异较大,S1与S4样本相邻聚为一支,S2与S3样本为另一支。S2样本的菌群种类单一且分布不均匀,S1、S3与S4样本细菌种类丰富,但S4样本中菌群间的丰度差异较大。海带的苗种繁育阶段(S2和S3)存在褐藻酸降解菌丰度增加的趋势,孢子体阶段(S4)则具有高丰度的共生型蓝细菌。 相似文献
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《Journal Of Applied Aquaculture》2013,25(1):33-43
Two "Pseudomonas" spp., designated as PF1 and PF2, were isolated from 147 of 148 channel catfish feed samples and 10 different orgns from anemic and healthy channel catfish, "Ictalurus punctatus." Both PF1 and PF2 are capable of using folic acid as the sole source of carbon and nitrogen, and they hydrolized folic acid to pteroic acid. They did not utilize common carbohydrates. In vitro, the bacteria destroyed over 93% of folic acid in media containing only folic acid and inorganic salts. The morphological and biochemical properties of the bacteria indicate that they are "Pseudomonas" spp. and similar to some other "Pseudomonas" spp. and similar to some other "Pseudomonas" species that utilize folic acid. It is suspected that these folate degrading bacteria are involved in a nutritionally related anemia of cultured channel catfish. 相似文献
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于2011年5月-8月对东山湾春、夏两季水体中异养细菌丰度进行调查,并探讨相关环境因子对异养细菌丰度的影响。结果表明：东山湾夏季水体异养细菌平均丰度为2．82×103 mL-1略高于春季2．05×103 mL-1,其中春季水体中异养细菌平均丰度为表层＆gt;底层＆gt;中层,而夏季水体中异养细菌丰度表、中、底层分布较均匀。春季东山湾水体中异养细菌丰度以龙须菜养殖区最高,而夏季以湾口区和鱼类网箱养殖区较高。相关性分析显示春季表层水体中异养细菌丰度与叶绿素a、 DO、 COD含量呈显著的正相关,夏季则与活性磷酸盐呈显著的正相关,同时,春夏两季底层水体异养细菌丰度与所测环境因子无显著的相关性。根据海水水质标准,以异养细菌丰度作为评价指标表明东山湾受陆源污染的程度较轻。 相似文献