APP下载

仔猪大肠杆菌病流行特点与治疗

2021-09-27周琰

畜牧兽医科学 2021年22期

周琰

摘要:在影响仔猪成活率的诸多因素中,大肠杆菌感染是威胁较大的一类。仔猪大肠杆菌病是一种急性、接触性传染病,具有发病急、发病过程短、死亡率高的特征,会对养殖业造成巨大的经济损失。大肠杆菌是自然环境中普遍存在的一种条件性致病菌,当猪群的肠道抵抗力相对较强时,大肠杆菌通常不会表现出明显的致病性,只有当受到多种应激因素刺激,胃肠道功能出现异常或菌群代谢失衡时,大肠杆菌就会趁机大量繁殖,产生毒素,引发不同程度的毒血症,造成猪群生长发育不良、生长迟缓、停止生长,甚至引起大量仔猪死亡。该文主要论述仔猪大肠杆菌病的流行特点,并探讨该病的具体治疗方案。

关键词:仔猪大肠杆菌病;流行特点;治疗措施

中图分类号:S858.28文献标识码:Bdoi:10.3969/j.issn.2096-3637.2021.22.031

Epidemiological Characteristics and Treatment of Colibacillosis in Piglets

ZHOU Yan

(Animal Husbandry and Veterinary Station of Changcheng,Zhucheng City,Weifang Shandong 262200,China)

Abstract:E. Coli infection is one of the most threatening factors affecting the survival rate of piglets. Piglet colibacillosis is an acute and contact infectious disease,which has the characteristics of acute onset,Short course of onset and high mortality. Escherichia coli (E. coli)is a kind of conditional pathogen that exists widely in the natural environment. When the intestinal resistance of pigs is relatively strong,E. coli usually does not show obvious pathogenicity,when the function of gastrointestinal tract is abnormal or the metabolism of flora is out of balance,E. Coli will take advantage of this opportunity to multiply in large numbers and produce toxin,causing toxemia of different degrees,resulting in the growth and development of pigs being stunted,slow growing,and stop growing,it even causes a lot of piglets to die.This paper mainly discusses the epidemic characteristics of Colibacillosis in piglets,and discusses the specific treatment of the disease.

Keywords:colibacillosis in piglets,epidemic characteristics,treatment measures

0引言

仔豬大肠杆菌呈革兰氏阴性染色,有鞭毛,可运动。该菌不会产生芽孢,但是部分菌株能产生荚膜。大肠杆菌的适应能力较强,能在好氧和厌氧条件下繁殖生长。最适宜的生长温度为37 ℃。致病性大肠杆菌和非致病性大肠杆菌的形态以及生化特征无差别,但是抗原结构不同。不同年龄的仔猪感染大肠杆菌后,临床症状存在一定差异,给疾病诊疗和防控工作带来极大困难,3~5日龄的新生仔猪主要表现为仔猪黄痢,2~3周龄的仔猪主要表现为白痢,断奶仔猪主要表现为水肿病。

1流行特点

1.1病原血清型较多

临床上大肠杆菌可以造成新生仔猪、哺乳仔猪和断奶仔猪出现发病情况,但是大肠杆菌病的血清性有所不同。……

登录APP查看全文