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. 2016 Mar-Apr;24(2):142–147. doi: 10.1590/1678-775720150469

Table 2. Antimicrobial susceptibility (Disc diffusion test) of β-lactamase-producing anaerobic bacteria against β-lactam antibiotics.

No of isolates resistant to β-lactam antibiotics (%)
aDisc diffusion test (n=85)
cfxA gene Ampicillin Penicillin
R S R S
Present (n=43) 18 (41.86) 25 (58.14) 24 (55.81) 19 (44.19)
Absent (n=42) 14 (33.33) 28 (66.67) 8 (19.05) 34 (80.95)

aDisc diffusion test (disk content 10 µg): R: Resistant ≤28 mm), S: Susceptible ≥29 mm)