A comparative survey between non-systemic Salmonella spp. (paratyphoid group) and systemic Salmonella Pullorum and S. Gallinarum with a focus on virulence genes

by Claudete S. Astolfi-Ferreira, Marcelo R.S. Pequini, Luis F.N. Nuñez, Silvana H. Santander Parra, Ruy Chacon, David I.D. de la Torre, Antonio C. Pedroso, Antonio J. Piantino Ferreira