The Efficacy of a Trivalent Inactivated Vaccine Combined with the Live Gallinarum 9R Vaccine in Young Layers after Experimental Infections with Enteritidis, Typhimurium, and Infantis.

Worldwide, poultry infections by are the cause of significant economic losses, not only due to reduced production (due to fowl typhoid disease), but also considering the efforts and control measures that must be constantly applied, especially due to zoonotic serovars. Poultry is a common reservoir of and its transmission into the food chain is a risk for humans. The vaccination of layers plays an important role in the overall efforts to prevent infections.

Pathogenicity of Strains from Peru and the Selection of Candidate Strains for an Inactivated Vaccine.

Worldwide, is the aetiological agent of infectious coryza in poultry. Vaccines are the best means of control, helping reduce clinical signs and colonization of this bacterium. Most vaccines are based on international reference strains, or, lately, regional strains, but, generally, without any information regarding their virulence.