“…Non-TEM-derived ESBLs such as VEB-1 (Kim et al, 2004), CTX-M b-lactamases (CTX-M-1, CTX-M-2, CTX-M-13 and CTX-M-31) (Ho et al, 2005;Karapavlidou et al, 2005) and plasmid-borne AmpC blactamases (CMY-2 and CMY-4) (Verdet et al, 1998;Park et al, 2006) have also been reported infrequently. The prevalence of ESBL-positive strains has been reported at 6.9 % in France , 7.0 % in Argentina (Quinteros et al, 2003), 8.8 % in Italy (Luzzaro et al, 2001) and 9.5 % in the US (Saurina et al, 2000). An outbreak of ESBL-producing P. mirabilis has been reported as a nosocomial infection caused by clonal spread (Nagano et al, 2003;Kim et al, 2004).…”