Beta-lactam antibiotics and viridans group streptococci Horacio A. Lopardo; Laura Vigliarolo; Laura Bonofiglio; Paula Gagetti; Gabriela García Gabarrot; Sara Kaufman; Marta Mollerach; Inés Toresani; Martha von Specht;

Resistance to ß-lactams in Streptococcus pneumoniae Martha von Specht; Gabriela García Gabarrot; Marta Mollerach; Laura Bonofiglio; Paula Gagetti; Sara Kaufman; Laura Vigliarolo; Inés Toresani; Horacio A. Lopardo;

Colistin-resistant Escherichia coli mediated by the mcr-1 gene from pigs in northeastern Argentina Juan Leandro Pellegrini; María de los Ángeles González; Liliana Silvina Lösch; Luis Antonio Merino; José Alejandro Di Conza;