Staphylococcus aureus Isolates from Bovine Mastitis in Eight Countries: Genotypes, Detection of Genes Encoding Different Toxins and Other Virulence Genes oleh Valentina Monistero, Hans Ulrich Graber, Claudia Pollera, Paola Cremonesi, Bianca Castiglioni, Enriqueta Bottini, Alejandro Ceballos-Marquez, Laura Lasso-Rojas, Volker Kroemker, Nicole Wente, Inge-Marie Petzer, Carlos Santisteban, Jeff Runyan, Marcos Veiga dos Santos, Bruna Gomes Alves, Renata Piccinini, Valerio Bronzo, Mohamed Salah Abbassi, Meriam Ben Said, Paolo Moroni