We now offer AST (Anti-Microbial Susceptibility Testing) rings for your in-clinic Microbiology program. Minimal training required; no special equipment needed. Each ring is impregnated with 8 different antibiotics specific to the type of infection. Types of rings include Ear, UTI, Gram Positive, Gram Negative, Skin/Wound, Equine, and Feline. Contact us for more information about our Color-Spot Microbiology system. It is the most cost-effective and quickest way to have your own in-clinic Microbiology program.