Infection with enterotoxigenic Escherichia coli in calves and protection of the calves by vaccination of the dams.
A report is given of a study on the occurrence of enterotoxigenic Escherichia coli in calves in Denmark. Samples from 1379 1-30-day-old calves were examined and ETEC were isolated from 228 samples (16.5%). While in 1-2-day-old calves nearly one half (47.5%) harboured ETEC, the frequency dropped to 3.4% in 8-day-old calves, and of 165 9-30-day-old calves just one was found to harbour ETEC. A field trial with K99-containing bacterins was performed in 14 herds with ETEC problems. A total of 109 cows were vaccinated with a 4-strain bacterin and 73 with a K99-bacterin, while 114 cows served as controls. Sixteen calves from the 4-strain bacterin group, 6 calves from the K99-bacterin group, and 25 calves from the control group, became diarrheic within their first week of life.
D000818:Animals; D000831:Animals, Newborn / Q000276:immunology*; D001428:Bacterial Vaccines; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology / Q000517:prevention & control*; D003718:Denmark; D003967:Diarrhea / Q000517:prevention & control / Q000662:veterinary*; D004768:Enterotoxins / Q000378:metabolism; D004926:Escherichia coli / Q000378:metabolism; D004927:Escherichia coli Infections / Q000453:epidemiology / Q000517:prevention & control / Q000662:veterinary*; D022361:Escherichia coli Vaccines; D005260:Female; D007112:Immunity, Maternally-Acquired; D011247:Pregnancy; D014611:Vaccination / Q000662:veterinary*
D001428:Bacterial Vaccines; D004768:Enterotoxins; D022361:Escherichia coli Vaccines