E. coli Tops Weaned Pig Diarrhea Causes
K88 and F18 are the leading causes of postweaning diarrhea.
Dec 22, 2010Paul Armbrecht, DVM
Postweaning diarrhea is a syndrome that has numerous causes affecting pigs 3-7 days after weaning. Rotavirus, salmonella and coccidiosis cause diarrhea in newly weaned pigs, but the major causes of E. coli are K88 and F18 strains
Case Study No. 1
A 2,400-sow herd has three-site production with twice-a-week weaning of pigs at 17-21 days of age. Each nursery room receives two weanings or 1 week’s worth of pigs. Each nursery/grower site has a four-room building that receives four week’s worth of pigs. The three sites are separated by several miles; each site has its own water and washing equipment, but the same staff takes care of all the pigs.
Site A experienced severe diarrhea in weaned pigs. All four rooms were affected at 5-10 days after arrival. The owner had tried several different water medications with very poor results. Pigs were dying very soon after showing clinical diarrhea and most of the group was affected within a few days.
The site, procedures and personnel were thoroughly examined. Pigs with acute diarrhea were sacrificed and tissues submitted for diagnostics. The results showed an F18 hemolytic E. coli with LT toxin.
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