Related Experiment Video
Updated: Jan 26, 2026

Development and Assessment of Intracellular Infection Models for Staphylococcus aureus
Published on: January 17, 2025
Performance of Four Selective Media for Enumerating Staphylococcus aureus in Corned Beef and in Cheese
K Rayman1, N Malik1, G Jarvis1
1Food Directorate, Health Protection Branch, Health and Welfare Canada, Tunney's Pasture, Ottawa, Ontario, Canada K1A 0L2.
Abstract:
The performance of four selective media for enumerating Staphylococcus aureus in artificially contaminated samples of corned beef was strain-dependent. Baird-Parker (BP), Kranep (KR), Mannitol Salt (MS) and Staphylococcus medium 110 (S110) performed equally well in enumerating an enterotoxin A producing strain, but KR and BP were significantly better than S110 in enumerating an enterotoxin D producing strain of S. aureus . In naturally contaminated cheese samples which abound with competing microorganisms, BP performed significantly better than the other three media.
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