Petrifilm™ Staph Express Count Plates (STX)

Petrifilm™ Staph Express Count Plates (STX) are ready-to-use culture plates for the quantification of Staphylococcus aureus. Suspected colonies are verified using Petrifilm™ Staph Express Disks. The system is based on a selective and differential chromogenic medium derived from the modified Baird-Parker method, which enables clear identification of typical reddish-violet colonies.

The method provides results in approximately 24 hours and replaces traditional agar-based methods by eliminating the need for media preparation. In cases of complex background flora, supplementary confirmation can be performed using Staph Express Disk for reliable identification of S. aureus.

Features

• Quantitative analysis of coagulase-positive staphylococci
• Specific detection of Staphylococcus aureus
• Results in approximately 22–26 hours
• Clear reading with reddish-purple colonies
• Dehydrated culture medium – no agar preparation required
• Option for confirmation using Staph Express Disk in cases of background flora
• AOAC and AFNOR-validated method
• Replaces the classic Baird-Parker agar + coagulase test