The original version of this popular broad spectrum milk antibiotic test, that takes the pill. Results are available in 2½ hours. For NCIMS use. A simple, reliable, and economical test for antibiotic residues in milk. Delvotest detects a broad spectrum of antibiotics—not limited to the penicillin family. Designed for use on the farm or in a laboratory, this standard diffusion test has high sensitivity to most veterinary antibiotics. Results are indicated by color. Self-contained, except for the required block heater, each kit contains individual plastic ampules containing Bacillus stearothermophilus in a solid medium, nutrient tablets(not required for SP-NT), dosing syringe, disposable pipets, tweezers, and instructions.