Help Please log in to determine if you are eligible to purchase PT Programs. METHICILLIN RESISTANT S AUREUS, 5 CHAL - MRS5 Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Procedure Challenges per Shipment Number of Shipments MRSA / MSSA detection 5 Three shipments per year Program Information Five swab specimens with diluents For laboratories performing culture‑based testing only or using culture and molecular testing Shipping Schedule Shipment A: February 1 Shipment B: June 1 Shipment C: October 4 Guest Log in/Register Customers Who Bought This Item Also Bought MRSA SCREEN, MOLECULAR, 2 CHALLENGE VIEW DETAILS >