Table 3. β-lactamases produced by Enterobacteriaceae (n = 64) isolated from the oral cavity of workers in an oncology hospital. Goiania, Goias, 2009-2010.

Enzymes	Isolates evaluated	Positive isolates	Total
	(f)	(f)	(%)
KPC	64	0	0
AmpC/induction	43	22	51.2
AmpC/hyperproduction	43	21	48.8
ESBL	16	0	0

KPC: Klebsiella pneumoniae Carbapenemase; ESBL: Extended Spectrum β-lactamase.