The Veterinary Record, Vol 139, Issue 6, 139-141
Copyright © 1996 by British Veterinary Association

Efficacy of a commercial competitive exclusion product against a chicken pathogenic Escherichia coli and E coli O157:H7

¹ National Veterinary and Food Research Institute, Food Microbiology Unit, PO Box 368, Fin-00231 Helsinki, Finland
² Orion Corporation, Animal Health Division, Tengströminkatu 6-8, PO Box 425, Fin-20201 Turku, Finland

The prevention of caecal colonisation of chicks by a poultry pathogenic Escherichia coli O20:K-:H8 and the human pathogenic E coli O157:H7 was studied in vivo in four one-week laboratory trials. Chicks were treated with a competitive exclusion product on the day of hatch and challenged one day later. The poultry pathogenic serotype showed higher levels of caecal colonisation than the human pathogenic serotype, but the protection against both pathogens was highly significant.

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