Medium reagent MS252

for bacterial isolationclinicalStaphylococcus aureus

Lack of Mastitis infection’s spread control in cattle is known as a cause of heavy economic losses to milk producers and to the dairy industry. Mastitis causes a reduction in the quantity and quality of milk output, increased veterinary expenses due to excessive use of medications, increased risk of residues in the milk or meat and, consequently, the possibility of damage to public health. Estimated costs per infection of clinical Mastitis go from $178 to $489 depending on milk prices, level of production in affected cows and stage of lactation when the disease occurred. In fact, the most common causes of antibiotic use in dairy cows are the treatment and prevention of mastitis. In order to avoid the indiscriminate use of antibiotics in cattle and reduce the economic burden of clinical mastitis, it is critical to implement an on-farm rapid identification of milk pathogens. CHROMagar™ Mastitis is a new commercially available tool for the rapid and simple differentiation of the main bacteria involved in Mastitis infections. It is supplied as a kit with two different media, one for the gram positive bacteria, and the other for the gram negative bacteria. For isolation and differentiation of pathogens involved in Mastitis Typical Appearance of microrganisms CHROMagar Mastitis GP Strep agalactiae → blue-green Strep uberis → metallic blue Staph aureus → pink Gram negative bacteria → inhibited CHROMagar Mastitis GN E.coli → red Klebsiella, Enterobacter, Citrobacter → metallic blue (+/- red halo) Proteus → brown halo Pseudomonas → cream, translucent