title: Protection Conferred by Infectious Coryza Vaccines Against Emergent Avibacterium paragallinarum Serovar C-1.
abstract: Infectious coryza is an upper respiratory disease of chickens caused by Avibacterium paragallinarum. Outbreaks of infectious coryza caused by Av. paragallinarum serovar C-1 isolates in coryza-vaccinated flocks in Ecuador and Mexico have been reported. In the current study, the protection conferred by four commercially available, trivalent infectious coryza vaccines in chickens challenged with a serovar C-1 isolate from an apparent coryza vaccine failure in a layer flock in Mexico was evaluated. Only one infectious coryza vaccine provided a good protection level (83%) in vaccinated chickens. These results might explain the infectious coryza outbreaks in vaccinated flocks that have been observed in the field.
authors: V
authors: V
authors: Morales-Erasto
authors: E
authors: E
authors: Maruri-Esteban
authors: H H
authors: HH
authors: Trujillo-Ruíz
authors: M
authors: M
authors: Talavera-Rojas
authors: P J
authors: PJ
authors: Blackall
authors: E
authors: E
authors: Soriano-Vargas
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines / Q000276:immunology*; D002645:Chickens; D015661:Pasteurellaceae / Q000145:classification*; D011201:Poultry Diseases / Q000517:prevention & control*; D013047:Specific Pathogen-Free Organisms
chemical_list: D001428:Bacterial Vaccines