A respiratory vaccine reaction in broiler chicks, 7 days old (vaccinated at hatch, with live newcastle vaccine)
A respiratory vaccine reaction in broiler chicks, 7 days old (vaccinated at hatch, with live newcastle vaccine).
Trachea: caseous plug, due to postvaccinal reaction (live newcastle vaccine).
Salmonella inactivated SC neck injection. Intense reactions were observed in the neck region. Extensive yellow caseous necrosis.