CHROMagar™ Mastitis

For isolation and differentiation of the main pathogens involved in Mastitis infections

Order References

Please use these references when
contacting your local distributor :

2 x 5000 mL Pack ………. MS252

Included : CHROMagar™ Mastitis GP (MS252/P) and CHROMagar™ Mastitis GN (MS252/N)


Colonies Appearance

CHROMagar™ Mastitis GP

S. agalactiae


CHROMagar™ Mastitis GP

S. uberis

metallic blue

CHROMagar™ Mastitis GP

S. aureus


CHROMagar™ Mastitis GN

Klebsiella, Enterobacter, Citrobacter

metallic blue (+/- red halo)

CHROMagar™ Mastitis GN

E. coli

dark pink to red

CHROMagar™ Mastitis GN


brown halo

CHROMagar™ Mastitis GN

C. albicans

white, opaque and small


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. 

1. Colorful differentiation of the main pathogenic bacteria : Facilitating the choice of appropriate and optimized therapies.


2. 24 h detection : Minimizing the time to make the best treatment decisions. 

3. Two-in-one plate : Allowing in one glance the identification of the whole spectrum of Gram (+) and Gram (-) bacteria.


Technical Documents

To download the certificate of analysis, please indicate your lot number below:

Scientific Publications