Description
The Neogen (formally 3M) Petrifilm Staph Express System is used for the enumeration of DNase positive Staphylococcus species in the food and beverage industries. The system consists of a Neogen Petrifilm Staph Express Count Plate and a Neogen Petrifilm Staph Express Disk which are sold separately.Plates are a sample-ready culture medium system which contains a cold-water soluble gelling agent. The chromogenic modified Baird-Parker medium in the plate is selective and differential for Staphylococcus aureus but may also indicate Staphylococcus hyicus or Staphylococcus intermedius. Red violet colonies are S. aureus, S. hyicus or S. intermedius. If background flora is present on the plate, the Neogen Petrifilm Staph Express Disk may be used to identify S. aureus from all suspect colonies.
