Bacitracin Susceptibility Test

The Bacitracin test is used to distinguish β-hemolytic streptococci. It can distinguish between Streptococcus pyogenes, which forms a zone of inhibition around the bacitracin disc, and Streptococcus agalactiae, which grows up to the disc.

Results:

• Positive – Streptococcus pyogenes
• Negative – Streptococcus agalactiae

Links

Related articles

• CAMP test
• Catalase test
• Plasmacoagulase test
• Optochin test

Bibliography

• ŠMÍROVÁ, Václava. Úvod do lékařské mikrobiologie. - edition. -. 

• BEDNÁŘ, Marek – SOUČEK, Andrej – FRAŇKOVÁ, Věra, et al. Lékařská mikrobiologie : Bakteriologie, virologie, parazitologie. 1. edition. Praha : Marvil, 1996. 558 pp. ISBN 8023802976.