Table 4. Genotypic profiles of different -lactamase enzymes detected among extended-spectrum -lactamase-producing E. coli isolated from samples from intensive care unit patients at Hamad Medical Corporation, Qatar.

Resistance gene	Gene family	Gene identity, %
CTX-M-15	Class A -lactamase	100
VEB-5	Class A -lactamase	100
VIM-2	Class B -lactamase	100
E. coli ampC	Class C -lactamase	97.9
E. coli ampC1	Class C -lactamase	99.3
E. coli ampH	Class C -lactamase	99.2
CMY-42	Class C -lactamase	100
OXA-10	Class D -lactamase	100
OXA-4	Class D -lactamase	100
OXA-486	Class D -lactamase	100