Table 3. Antimicrobial susceptibility (Broth dilution test) of β-lactamase-producing anaerobic bacteria against β-lactam antibiotics.

cfxA gene	No of isolates resistant to β-lactam antibiotics (%)
	aBroth dilution test (n=17)
	Amoxicillin			Penicillin
	R	I	S	R	I	S
Present	9 (52.94)	0	8 (47.06)	10 (58.82)	1 (5.89)	6 (35.29)

^aBroth dilution test: R: Resistant (≥2 µg/ml), I: Intermediate susceptibility (1 µg/ml), S: Susceptible (≤0.5 µg/ml)