仔猪肠道疾病 PPT课件.ppt

仔猪肠道疾病_PPT课件Enteric Diseases of Young Pigs仔猪肠道疾病
作者:Larry Firkins, DVM, MS, MBA
College of Veterinary Medicine
University of Illinois
美国伊利诺斯大兽医学院
Diarrhea remains one of
the leading causes of
neonatal mortality in swine
下痢一直是新生仔猪死亡的主要原因
Definition of Diarrhea下痢的定义
Excess water in feces relative to dry
Normally, much of the fluid is absorbed in the small intestine before it exits the ileum 通常,大部分水都在进入回肠之间就在小肠中被吸收了
Colon serves to conserve water and electrolytes结肠只起吸收水和电解质的作用
Mechanisms of Diarrhea下痢的机理
Secretory Diarrhea分泌性下痢
Result of the effect of enterotoxins secreted by bacteria and some viruses细菌和其它病毒分泌的肠***造成的结果
Alteration in secretion of electrolytes, water, and bicarbonate: gradient pulls water into lumen电解质、水和碳酸氢钠的分泌发生改变:使水进入肠腔
Absorption continues: Chyle in lymphatics
Mechanisms of Diarrhea下痢的机理
Malabsorptive Diarrhea吸收不良性下痢
Reduction in surface area of intestine肠粘膜表面积减少
Loss of absorptive capacity吸收能力减弱
Villous atrophy绒毛萎缩
Chyle absent in lymphatics淋巴乳糜缺乏
Undigested ingesta ferments未消化的食糜发酵
Mechanisms of Diarrhea下痢的机理
Effusive Diarrhea渗漏性下痢
Result of severe damage to mucosa粘膜严重受损的结果
Necrotoxins produced by bacteria细菌产生的坏死***
Leakage of serum proteins and water due to vascular damage血管受损导致血清蛋白质和水漏出
Loss of absorptive capacity吸收能力减弱
Arriving at a Diagnosis诊断
Selection of specimens病料采集
Diarrhea of 24 hrs or less下痢开始后24小时以内
Untreated未经治疗
Avoid pigs which “died during the night”不要从夜间死亡的猪采集病料