This smaller 4-pathogen mastitis panel focuses on the most common causative organisms, offering a faster, lower-cost screening option for routine herd monitoring where a full 16-pathogen workup isn't necessary. Useful as a first-line screen before escalating to the broader panel if results are inconclusive or symptoms persist. Requires a nucleic acid extractor and thermal cycler. Shelf life 12 months, store at 2-8°C.