Serovars, virulence and ARGs of non-typhoidal Salmonella strains isolated from dairy systems in Mexico

Salmonella isolated from dairy farms have a significant effect on animal health and productivity. Dairy cows can be silent Salmonella shedders, increasing the possibility of spread Salmonella within the farm. The aim of this study was to determine the genomic characteristics of Salmonella isolates from dairy farms and to detect the presence of virulence and antimicrobial resistance genes. A total of 377 samples were collected in a cross-sectional study from calves and periparturient cow feces, and maternity beds in 55 dairy farms from the states of Aguascalientes, Baja California, Chihuahua, Coahuila, Durango, Mexico, Guanajuato, Hidalgo, Jalisco, Queretaro, San Luis Potosi, Tlaxcala, and Zacatecas.