Staphylococcus chromogenes

Stap sector (staphylococci), medium-sized white to slightly cream colonies, number 4; in the strep sector is Streptococcus uberis, blue colony, number 3

Staphylococcus chromogenes is another bacterium from the genus Staphylococcus, which is the cause of subclinical mastitis in dairy cows. 

In the Czech Republic, it is diagnosed in more than 20% of cases of staphylococcal subclinical mastitis, in second place after the dominant pathogen S. aureus. In some Europead countries (e.g. Belgium, the Neatherlands, Denmark), in Scientific publications veterinarians report up to 50% of staphylococcal mastitis of species other than S. aureus are Staphylococcus chromogenes.

 

Interestingly, subclinical mastitis with a higher number of cellular elements in milk caused by Staphylococcus chromogenes occurs, according to the literature, in many countries around the world - where machine milking of cows is used. However, the incidence varies considerably between dairy herds. 

Professional article-English: https://doi.org/10.3168/jds.2020-18685 

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