CowSide II

cowside2 KitCharm Cowside II Test is a broad-spectrum inhibition test typically used for screening of raw commingled and ultra-pasteurized cow milk on the farm. It detects all major classes of antibiotics: beta-lactams, sulfonamides, tetracyclines, macrolides, and aminoglycosides. Eleven drugs are detected at or below US Safe Levels and 30 drugs at or below EU MRLs.

Each kit contains materials for 20 or 100 tests. Add sample, incubate, and then compare the vial color to reference colors for the result.

Cowside II Test kits consist of single service wells that contain pre-measured bacterial spores, media, and a pH indicator. The starting color in the well is blue/purple. Milk is added to the well and incubated. If antibiotics are absent, spores germinate and grow, which changes the color to yellow or yellow/green. If antibiotics are present in the milk, microbial growth is inhibited and the positive sample remains blue/purple.