肉仔鸡坏死性肠炎发病情况调查

鸡坏死性肠炎(NE)是由A型或C型魏氏梭菌毒素引起的一种急性非接触性细菌性传染病。主要危害2～5周龄的雏鸡，以小肠黏膜坏死为特征，是一种散发病。近年，本病的发生呈上升趋势，该传染病已经成为危害养鸡业的一种主要传染病，给养鸡产生带来了严重的经济损失。我们对几个鸡场肉仔鸡坏死性结肠炎的发病情况进行了调查，报告如下。     

肉仔鸡坏死性肠炎的预防

鸡坏死性肠炎又称鸡魏氏梭菌病,是肉鸡养殖业常见疾病,特别是肉仔鸡多发。随着近几年我区肉鸡饲养量的不断增长（年肉鸡饲养量近600万只）,饲养场（户）防疫消毒意识的麻痹,导致该病的发生呈逐渐上升趋势,已经成为危害养鸡业的一种主要传染病,由此给养殖户带来严重的经济损失。因此,做好肉仔鸡坏死性肠炎的预防工作尤为重要。     

肉仔鸡球虫病并发坏死性肠炎的诊治

1　发病情况某鸡场 ,现存栏各日龄肉仔鸡 75 0 0余只 ,场主于 7月 2 5日发现有一栋鸡舍鸡群出现异常。表现为鸡群饮水增多、采食减少 ,精神变差 ,有红色粪便。场主怀疑此次发病是由球虫引起 ,随即按球虫病治疗 ,克球粉连用 7天未见效果 ,并出现鸡只死亡 ,至 8月 1日共死亡 80余只 ,并且上述症状更加重 ,即于 8月 2日邀笔者前去诊治。2　临床资料2 .1　该场为 1 995年建场投产 ,饲料配方、给料给水均未见异常。生产方式为局部全进全出制三层全重叠笼养。设备一直使用至今。2 .2　鸡群表现如场主所述 ,笼内偶见有精神极度沉郁的仔鸡。鸡群中腹…     

肉仔鸡球虫病并发坏死性肠炎的诊治

黑龙江省肇东市某个体鸡场肉仔鸡发生球虫病并发坏死性肠炎，现将诊治情况报告如下。     

肉仔鸡球虫病并发坏死性肠炎的诊治

肉仔鸡球虫病并发坏死性肠炎是规模化养殖场常见的疾病之一,该种疾病危害十分严重。近些年,随着肉鸡养殖产业逐渐向着规模化和集约化方向发展,肉仔鸡球虫病并发坏死性肠炎呈现高发趋势,做好该种疾病诊治工作十分重要。     

肉仔鸡球虫病并发坏死性肠炎的诊治

1发病情况黑龙江省肇东市某养鸡户养鸡2万只,饲养面积300 m2,采用双层网上平养,每30 d出栏一批,每批育雏2 000只,空舍10～15 d,经消毒后进下一批雏,循环饲养。2011年8月份,饲养至3周龄的肉仔鸡突然发病,3 d内发病600多只,死亡117只。主要     

肉仔鸡溃疡性肠炎的诊断

溃疡性肠炎是由鹑梭状菌(Clostridium colinum )引起的一种感染禽类的急性细菌性传染病。该病以突然发病，迅速大量死亡，肝脏表面有大小不一的黄白色坏死灶，肠黏膜出血和黄白色的溃疡灶为特征。现将一典型病例报道如下。     

肉仔鸡盲肠球虫病并发坏死性肠炎的诊治

1 发病情况 2006年3月5日邵武市城郊某鸡场购进土杂肉鸡2 000羽,按照常规免疫程序进行了免疫.饲养至28日龄时,发现一部分仔鸡出现异常症状,3 d内死亡20羽.主要表现为饮水增多、减食,精神沉郁、腹泻,粪便呈红褐色或红白色.即用"可爱丹"拌料治疗,未见效.     

魏氏梭菌引起肉仔鸡坏死性肠炎的诊治

2003年6月，库尔勒市一养鸡户，地面平养的600羽21日龄肉仔鸡群中突然出现急性死亡病例。4天时间里先后发病约200羽，死亡49羽，病死率近25％。     

Necrotic Enteritis in Broiler Chickens II. Pathology and Proposed Pathogenesis

The intestines from 124 dead, sick and normal broiler chickens from 24 cases of necrotic enteritis were subjected to histological examination. Tissue sections from the duodenum, jejunum, ileum and ceca from each broiler were examined histologically for lesions of necrotic enteritis and the presence of coccidia. Lesions of necrotic enteritis were present in one or more areas of the intestine in all but six of 94 dead or sick birds and they were most common and severe in the jejunum. Coccidia were found in only small numbers in both diseased and normal birds.

Brown and Brenn stained sections showed Gram-positive bacilli intimately associated with early necrotic lesions on the tips of villi. Tissue sections from the intestines of sick birds permitted a proposed pathogenesis for this disease with the lesion starting at the tips of villi.

The similarity in pathogenesis and pathological lesions in this disease of broilers and Clostridium perfringens type C enteritis in baby pigs is discussed.

     

家养野雉鸡坏死性肠炎的诊治

民和县北山乡张某于2010年1月10日从甘肃引进了640多只1月龄野雉鸡,经3个多月的精心饲养,生长良好,成活率达95%以上.3月12日早晨突然发现有46只野雉鸡精神不振,多为卧地不起,食欲减少或废绝.     

Effect of Spray-Dried Plasma Form and Duration of Feeding on Broiler Performance During Natural Necrotic Enteritis Exposure

The effect of duration of feeding (continuous or discontinued after d 14) and form (granular vs. powder) of spray-dried plasma (SDP) on performance and mortality of broilers using used litter was evaluated with 240 Ross × Ross 308 male broilers (6 broilers per pen, 8 pens per treatment). Dietary treatments were control (no SDP) or SDP as powder or granular included in the pellet and fed continuously (d 0 to 35) or discontinued after d 14. During the experiment, broilers developed necrotic enteritis, and tissue cultures were positive for Escherichia coli and Salmonella, resulting in 50% mortality on control broilers. Addition of SDP to the feed improved (P < 0.05) average daily gain, feed intake, and feed efficiency for each period of the study (d 0 to 14, 15 to 28, 29 to 35, and 0 to 35). Continuous feeding of SDP improved (P < 0.05) average daily gain, feed intake, and feed efficiency from d 15 to 35 compared with broilers fed SDP to d 14. Liveability was improved (P < 0.05) in broilers consuming SDP either for 14 d or continuously throughout the experiment compared with control broilers. Spray-dried granular plasma was more effective than spray-dried powder plasma from d 0 to 14. The results of this experiment confirmed that SDP improved broiler growth rate, feed intake, feed efficiency, and minimized enteric challenge associated with necrotic enteritis with maximal protection afforded by continuous feeding. The response to SDP was independent of age of the broiler.     

鸡梭菌性肠炎研究概论

从病原学、流行病学、症状及病变、致病机理、诊断、治疗及预防、免疫进展等方面对鸡梭菌性肠炎进行介绍,并对该病未来研究热点进行了展望,为开展鸡梭菌性肠炎的基础研究、疾病预防控制提供参考。     

鸡小肠球虫病与坏死性肠炎混合感染的诊治

鸡小肠球虫病是由艾美耳球虫属原虫寄生侵害鸡消化道上皮,造成鸡只肠道损伤、饲料转化率降低和不同程度的死亡率,耐过鸡生长发育受阻,增重缓慢等.由于球虫寄生造成肠道内酸碱失衡、机体抵抗力下降等,常引起产气荚膜梭菌、大肠杆菌等致病菌的混合感染.     

肉鸡传染性法氏囊炎与坏死性肠炎混合感染的诊治

1流行特点及临床症状我站辖区56个肉鸡饲养大户,饲养肉鸡为地面棚养,在14日龄口服中等毒力法氏囊疫苗免疫一次。自6月中旬以来,有52个饲养场的鸡在2￣5周龄时陆续发病,症状基本相同。表现症状:大群发病,精神沉郁、翅下垂、闭目缩颈、羽毛蓬松逆立、无光泽、采食量锐减,脱水消瘦、冠苍白、排白色水样粪便,有的排西红柿样或肉样粪便,部分鸡排棕黑色酱样便。投服磺胺类、地克珠利、马杜霉素等球虫药治疗无效果,投服抗生素略有好转,但不能根治,反复发作,注射卵黄抗体后投服抗生素,采食恢复,鸡群转为正常。2剖检变化鸡只脱水,消瘦,皮肤不易剥离,…     

肉鸡小肠球虫病与坏死性肠炎混合感染的诊治

<正>随着家禽养殖业的不断发展,养殖环境日益恶化,耐药虫株不断出现,使球虫病越来越成为令人头疼的一种疾病。若再继发坏死性肠炎,往往导致肉鸡生长发育缓慢、饲料转化率低、生长停滞和部分死亡,临床上出现明显的肠毒血症等症状,对肉鸡生产危害极大。     

Necrotic Enteritis in Broiler Chickens I. A Review of the Literature and the Prevalence of the Disease in Ontario

The available literature on necrotic enteritis in broiler chickens is reviewed.

The records of three poultry diagnostic laboratories in Ontario were examined for the years 1969, 1970 and 1971. During this period 855 (7.7%) of 11,076 consignments of broiler chickens examined were diagnosed as necrotic enteritis. The condition was most common in broilers at three weeks of age, with 66% of all cases occurring in chickens between two and four and one half weeks. The disease occurred throughout the year but it was most common during July, August, September and October. Necrotic enteritis often occurred more than once per year on a farm.

     

"家禽肠道疾病及其预防措施"专栏(二)防控坏死性肠炎的实用营养方法

近年来,肉鸡营养研究取得了重大的进展.抗生素生长促进剂以及肉骨粉的禁用迫使家禽业必须做出一些调整以维持动物肠道的健康以及营养物质的有效利用.     

春季如何有效的控制坏死性肠炎

质量是铸就品牌的基石。华都峪口禽业作为中国蛋种鸡领域中的领袖企业,长期致力于解决"产不出"、"卖不出"两大难题,凭借自身长期积累的蛋鸡及种鸡饲养管理经验,在推出健康养殖理念的同时,不断创新,其具有自主知识产权的4A级雏鸡质量生产体系为推动我国蛋鸡行业健康持续发展做出了突出贡献,视为行业典范。我们推出的峪口禽业"4A级雏鸡质量管理"技术顾问专栏,邀请来自峪口禽业的专家们与您一起分享其4A级雏鸡质量管理精髓。