Field experience with infectious bronchitis (IB) in broilers during a harsh winter demonstrated that vaccination for secondary Escherichia coli infection helped stem losses, according to Kalen Cookson, DVM, MAM. Broiler flocks in the poultry-dense Delmarva region of the US had been affected by the DMV-1639 IB strain.
At the time, no vaccines were available to protect against the emerging pathogen, which gained momentum throughout the winter, Cookson, director of clinical research, Zoetis, told Poultry Health Today at the 2018 International Avian Respiratory Disease Conference. Read more