title: [An agar medium for direct enumeration of Staphylococcus aureus: pork plasma medium for S. aureus (PPSA)].
abstract: A selective agar medium (pork plasma medium for S. aureus (PPSA)) enables the direct enumeration of coagulase-positive staphylococci. This medium is based on the Baird-Parker agar without egg yolk and is supplemented with pig plasma. Colonies of Staphylococcus aureus are surrounded by a halo of precipitated fibrin. When foods such as dairy products contain large numbers of egg yolk-negative strains of S. aureus, the PPSA agar has the advantage over egg yolk containing media such as Baird-Parker agar that fewer suspect colonies have to be confirmed.
mesh_terms: D000362:Agar; D000818:Animals; D001769:Blood; D003030:Coagulase / Q000096:biosynthesis; D003611:Dairy Products; D005069:Evaluation Studies as Topic; D005516:Food Microbiology; D013211:Staphylococcus aureus / Q000201:enzymology / Q000254:growth & development / Q000302:isolation & purification*; D013552:Swine
chemical_list: D003030:Coagulase; D000362:Agar
vernacular_title: Un milieu gélosé pour le dénombrement direct de Staphylococcus aureus: milieu au plasma de porc pour S. aureus (PPSA)