Evolution of an International External Quality Navegación de entradas Identification of the Novel Narrow-Spectrum B-Lactamase SCO-1 in Acinetobacter spp. from Argentina Complex Class 1 Integrons with Diverse Variable Regions, Including aac(6)-Ib-cr, and a Novel Allele, qnrB10, Associated with ISCR1 in Clinical Enterobacterial Isolates from Argentina