Simple phenotypic tests to improve accuracy in screening chromosomal and plasmid mediated colistin resistance in gram-negative bacilli Navegación de entradas Comparative Kinetic Analysis of OXA-438 with Related OXA-48-Type Carbapenem-Hydrolyzing Class D Beta-Lactamases Nasal Colonization of Methicillin Resistant Staphylococcus aureus in Argentinian Fattening Pigs