JOURNAL OF CLINICAL MICROBIOLOGY, cilt.39, sa.2, ss.791-793, 2001 (SCI-Expanded)
Two Salmonella enterica serovar Typhimurium strains from different clonal origins, both producing an extended-spectrum p-lactamase (TEM-52), were isolated from a patient. This enzyme was encoded on a single plasmid and was found at very low levels in one strain, while being encoded on multiple plasmids and in multiple different EcoRI fragments in the other strain.