《Egg-Yolk Antibody Product》.pdf

L. V. Chernysheva, R. M. Friendship, C. L. Gyles, and C. E. Dewey Field Trial Assessment of the Efficacy of Specific Egg-Yolk Antibody Product for Control of Postweaning E. coli Diarrhea* Larisa V. Chernysheva, DVM, MSca Robert M. Friendship, DVM, MSc, DABVPa Carlton L. Gyles, DVM, PhDb Catherine E. Dewey, DVM, MSc, PhDa aDepartment of Population Medicine bDepartment of Pathobiology Ontario Veterinary College University of Guelph Guelph, Ontario, Canada N1G 2W1 ABSTRACT garding the development of resistance and Postweaning diarrhea caused by Escherichia frustration from lack of a good clinical re- coli is a major cause of mortality and morbidity sponse has led to the search to find alternative in many swine nurseries throughout North control measures. Attempts to reduce E. coli America. Commercial products containing populations in the gastrointestinal tract in- chicken egg-yolk antibodies specific for the con- clude the provision of high levels (2,000 ppm trol of K88+ E. coli diarrhea have been used in or more) of zinc oxide in feed,3 acidifiers in an attempt to prevent disease losses. The present feed and water, and the use of nontraditional study evaluated the use of an egg-yolk antibody products such as herbs and essential oils. Re- product incorporated into nursery feed on two searchers also have examined the use of prebi- farms where K88+ E. coli diarrhea was identified otics and probiotics to determine if these prod- as a problem. There were no differences in the ucts might be useful in altering gut flora in prevalence of diarrhea or mortality between weaned pigs.4 treatment and control pigs at either