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Bacitracin is a polypeptide antibiotic that is chemically unrelated to neomycin. It inhibits bacterial cell wall synthesis. It is produced by Bacillus subtilis (Gehrig & Warshaw, 2008).
The beta hemolytic organisms (Streptococcus pyogenes and Streptococcus agalactiae) are tested with Taxos A (bacitracin). A zone of inhibition of growth around the Taxos disc indicates that the ...