鱼粉引起蛋鸡混合感染沙门氏菌和大肠杆菌病的诊治

1发病情况 该场有鸡舍2栋,存栏商品蛋鸡5000只,品种为海兰.2002年4月5日,5000只31周龄蛋鸡同时发生腹泻,伴随腹泻而来的是鸡产蛋率急剧下降,发病前为83%,发病第7天降至43%,15天后降至20%,死亡率高达4.2%,死亡鸡210只.发病过程中分别投服过土霉素、庆大霉素、痢菌灵等药物,初期见效但马上又复发.     

银狐沙门氏菌与大肠杆菌混合感染的诊治

某银狐养殖场幼狐发病,根据实验室诊断,确诊为沙门氏菌与大肠杆菌混合感染,且两种菌均具有强致病性,药敏试验结果为临床用药提供参考依据。     

仔猪弓形虫沙门氏菌大肠杆菌混合感染的诊治报告

60～70日龄杂交仔猪53头,发病率达81.13%,病死率达20.93%。病猪的临床症状、重症病猪的病理变化、实验室检查结果表明,致病菌为弓形虫和沙门氏菌、大肠杆菌。经选用对弓形虫和沙门氏菌、大肠杆菌均高敏的复方磺胺间甲氧嘧啶钠混悬注释液治疗,并采取综合防治措施,迅速控制了疫情。     

猪瘟病毒、沙门氏菌、大肠杆菌混合感染诊治

1发病情况 猪病初不食,精神萎靡,有的拉稀,有的便秘,后期便秘与拉稀交替出现。体温41．5℃左右,死前呼吸急促,耳朵发紫、肿胀,额部肿胀。病猪曾用青霉素、链霉素、庆大霉素、水肿灵等药物治疗。 2临床症状 病猪挤卧一隅,肌肉震颤,精神高度沉郁．不原走动,步态不稳,摇摆不定,行走缓慢。两眼无神．有的结膜苍白,有的结膜潮红,体温均在41℃以上。猪只周身步满红点,有的耳朵、四肢末端发紫,其中一头全身发红。有的猪只无免疫标志。     

一例肉鸡大肠杆菌和支原体混合感染的诊治

在养鸡生产中，一些条件性致病菌，如大肠杆菌、沙门氏菌、支原体等在饲养密度过大，空气污染，免疫应激，天气变化，维生素缺乏等不良因素影响下引起鸡群发病，给养鸡业带来巨大的经济损失。2004年12月17日，笔者对平顶山一肉鸡场发生的一种以呼吸困难、喘气、咳嗽、饮食量下降为特征的传染病进行诊断。经流行病学、临床症状、剖检变化和实验室检查，诊断为大肠杆菌和支原体混合感染。     

鸡大肠杆菌与沙门氏菌混合感染的诊断和治疗

对陕西省兴平市西吴乡的 1 5家农户散养的病死肉杂鸡进行了流行病学调查、临床症状和病理变化观察、细菌学诊断。结果表明 ,本次地方流行病的发病率达 3 4.2 % ,病死率达 1 0 0 % ;从病死鸡中分离出几株细菌 ,通过菌体形态、染色特性、生化试验等系统鉴定 ,致病菌为大肠杆菌和沙门氏菌。药敏试验表明 ,两种菌均呈现多重耐药性。选用对两种菌均高敏的沙拉沙星治疗并采取综合性措施 ,迅速控制了疫情     

鸡大肠杆菌与球虫混合感染的诊治

我县某养殖专业户饲养固始土鸡2850只,饲养方式为地面厚垫料平养,先后接种过新城疫、法氏囊等苗,28日龄时,鸡群长势一直很好,35日龄时,该鸡群突然发生腹泻,相当数量鸡粪中带血,发病率26％,死亡率占发病率的4％。     

鸵鸟球虫、大肠杆菌和沙门氏菌混合感染的诊治

重庆某鸵鸟养殖场于2010年3月份从云南引进60日龄鸵鸟30余只,饲养半个月后开始间断性发病,表现为不食、拉黑色、白色稀粪,急性病例发病2d就出现死亡,先后使用了一些健胃止泻等对症药物,病情未得到控制,至2010年6月16日,发病20只,死亡15只,发病率为66．7％,死亡率为50％,     

雏鸭病毒性肝炎并发传染性浆膜炎的诊治

鸭疫里默氏杆菌病(Riemerella anatipestifer,RA)又称为鸭传染性浆膜炎,是侵害雏鸭的一种急性或慢性败血性传染病.RA主要感染家鸭,1～8周龄鸭均可感染,但2～3周龄的雏鸭最易感,发病率高,一般为60%～70%,有时高达90%.     

兔球虫与大肠杆菌病混合感染的诊治

阐述了兔球虫与大肠杆菌病混合感染的临床症状、实验室检验及防治方法,力求为科学防控两病提供有益的参考。     

北京某鸭场鸭疫里默氏菌与大肠杆菌混合感染的诊治

自2012年7月30日起,北京市延庆县某鸭场开始出现大批鸭子发病及死亡。从发病鸭的内脏组织进行细菌分离,经过分离培养、革兰染色和瑞氏染色及16S rDNA序列分析,结合临床表现及剖检变化,确诊为鸭疫里默氏菌与大肠杆菌的混合感染。根据药敏试验结果选用抗菌药物进行治疗,该场的病情很快得到了控制。     

鸭副黏病毒病并发大肠杆菌病的诊治

2011年9月,吉林省吉林市经济技术开发区某养殖场饲养的1 500只产蛋鸭暴发疑似鸭副黏病毒与大肠埃希菌混合感染,引起大量死亡和生产性能下降。发病后经我校实验室诊断、治疗,病情得到了控制。     

The prevalence of verocytotoxin-producing Escherichia coli and antimicrobial resistance patterns of nonverocytotoxin-producing Escherichia coli and Salmonella in Ontario broiler chickens.

The prevalence of verocytotoxin-producing Escherichia coli and Salmonella in Ontario broiler chickens was determined by culturing cloacal samples from 500 individual birds selected from 50 poultry farms. Resistance to antimicrobials was determined for each of the isolates. In addition, abattoir and farm-level management data were obtained to evaluate variables that may be considered risk factors for infection. The variables selected included: Percentage of birds condemned at slaughter, percentage of birds dead-on-arrival, bird weight, truck number, farm size, hatchery source, litter source and type, feed source, mortality levels, type of water drinker, water sanitization, down time, barn clean out and history of antibiotic treatment. None of the cloacal samples revealed the presence of verocytotoxin-producing E. coli, though 19/500 (3.8%) contained Salmonella organisms. Nine different Salmonella serotypes were isolated; the most common being S. hadar, S. heidelberg and S. mbandaka. Resistance to tetracycline and streptomycin was common among Salmonella (63%) and E. coli (25.2%) isolates. Resistance to two or more antimicrobials occurred in 420/500 (84%) of the E. coli isolates. No statistically significant associations between abattoir or farm-level management variables and the Salmonella-status of farms were demonstrated.     

小尾寒羊扩展莫尼茨绦虫与大肠埃希氏杆菌混合感染的诊治

2005年4～10月,广东省湛江市某养殖场的小尾寒羊出现一种以极度贫血、衰弱、消瘦为主要症状的疾病。笔者通过流行病学调查、病理剖检、血液检验、寄生虫体鉴定及微生物学诊断,确诊为扩展莫尼茨绦虫（M．Expansa）及大肠埃希氏杆菌（E．coli）混合感染。经采取丙硫咪唑、环丙沙星治疗等综合防制措施后,病情得到了有效控制。     

沙门菌和大肠杆菌噬菌体对试验感染小鼠的保护作用

鉴于沙门菌、大肠杆菌对人和动物的危害及耐药菌株的不断增多,在评价沙门菌噬菌体SP3383、大肠杆菌噬菌体EP-SY体外杀菌活性及安全性的基础上,应用二者进行了预防和治疗宿主菌感染实验小鼠的保护作用研究。结果显示,SP3383和EP-SY分别在与宿主菌体外共培养的初始7 h和5 h使细菌数量明显减少;10~(12) PFU/只的噬菌体对离乳昆明小鼠是安全的;噬菌体SP3383、EP-SY可明显减轻宿主菌感染导致的小鼠空肠或十二指肠病变,显著降低宿主菌感染小鼠脾脏及空肠或十二指肠的荷菌量(P<0.05)。     

A preliminary study of Salmonella, verocytotoxigenic Escherichia coli/Escherichia coli O157 and Campylobacter on four mixed farms

The aims of this study were to investigate the incidence of Salmonella, verocytotoxigenic Escherichia coli (VTEC)/Escherichia coli O157 and Campylobacter on four mixed farms and to characterize the isolates in terms of a range of virulence factors. Eighty-nine composite (five different samples from the same animal species combined) faecal [cattle (24), pigs (14), sheep (4), poultry (4), horses (7), deer (4), dogs (9), rodents (2) and wild birds (20)] samples, 16 composite soil samples plus 35 individual water samples were screened using culture-based, immunomagnetic separation and molecular methods. Salmonella was detected in bovine faeces, cattle and poultry house water. Salmonella serotypes/phage types included Dublin, Kiel and Typhimurium DT193, and most isolates were spvC, invA and rck positive. The pefA and rck genes were found exclusively in the non-Typhimurium strains, while Salmonella Dublin and Salmonella Kiel strains carried Salmonella genomic island I marker(s). VTEC/E. coli O157 were found in deer and dog faeces only. The E. coli O157 isolate was an enteroinvasive E. coli, while the VTEC isolate was untypable but carried the vt1, eaeA, hlyA, tir and eptD genes. This article reports the first confirmed carriage of E. coli O157 in Irish deer. Campylobacter species were not detected over the course of this study. It was concluded that [1] Salmonella, VTEC and Campylobacter have low (<5%) prevalence or are absent on the farms in this study; [2] water was an important source of bacterial pathogens; [3] both dogs and deer may act as a source of pathogenic E. coli and [4] key virulence and resistance determinants are widespread in farm Salmonella strains. This study highlights the need to control water as a source of pathogens and suggests that the domestic pets and deer should be considered in any farm risk assessment.