Penicillin Disk

Confirm Gram stain reaction of anaerobes and presumptively identify anaerobic, gram negative bacilli with Thermo Scientific™ Remel™ Penicillin Disk. Proposed in 1971 by Sutter and Finegold¹ who recommended a method to identify anaerobic, gram-negative bacilli based on the difference in response to an antibiotic. Accordingly, organisms can be grouped based on their characteristic inhibitory patterns with erythromycin, rifampin, colistin, penicillin, kanamycin and vacomycin^2,3.

Presumptively identify anaerobic bacteria with Penicillin Disk^3,4.

• Ready to use – Vancomycin-impregnated disk
• Easy to interpret – With visual inspection

Penicillin G Disk contains 2 U penicillin.

Disks impregnated with erythromycin, rifampin, colistin, penicillin, kanamycin and vancomycin can be used to identify anaerobic, gram negative bacilli based on the zone of inhibition they exhibit. Colistin and vancomycin confirm the gram stain reaction, which is helpful with the clostridia that stain gram-negative. Penicillin, rifampin and kanamycin separate Bacteroides and Fusobacterium.