Select targets deliberately
Specified-organism testing addresses named organisms. It is not a single test for every potential contaminant. The product category, route of use, monograph and specification determine which organisms and test quantities belong in the request.
Enumeration is complementary
A product can meet a total count limit while containing an organism that matters for its intended use. Pair targeted testing with enumeration when the product specification calls for both.
Define the reporting question
Supply the required presence/absence statement and the amount of product it must describe. The tested portion and the target must be clear before a detected or not-detected result can be interpreted.
Prepare the sample
Send representative, separately identified units. Include preservatives and antimicrobial ingredients so recovery and suitability can be addressed.
Related testing & guidance
Technical & service references
Vanguard microbiology service menuFDA: Bacteriological Analytical ManualUSP: General Chapter <61>Source review: November 8, 2026. The agreed method and project scope govern the testing.