Analyst Verification
A routine process to verify analyst proficiency for consistent enumeration and organism characterization. At least monthly when microscopic examinations are performed, a slide containing 40-200 (oo)cysts is prepared. The total number of FITC positive (oo)cysts determined by each analyst using this slide must be within 10% of each other or performance verification must be repeated. Each analyst also determines DAPI and DIC categories for the same 10 (oo)cysts. Differences in the DAPI and DIC categorizations among analysts must be discussed, resolved, and documented.