Answer :
The most common type of gram-positive and gram-negative bacteria that cause clinical mastitis is Escherichia coli.
Although escherichia coli is a facultative anaerobe and may thus grow under anaerobic conditions, it grows best at 37°C under aerobic settings as a member of the Enterobacteriaceae family. The optimal temperature range for the growth of Staphylococcus epidermidis is between 15° and 45°C. However, the species thrives in aerobic conditions between 30 and 37°C. Microccocus luteus may grow in 10% sodium chloride and at 45 degrees Celsius. It will flourish on a range of media, including Sheep Blood Agar, Standard Methods Agar, Tryptic Soy Agar, and Nutrient Agar. Colonies are round, golden, convex, and smooth in appearance. The primary distinction between Staphylococcus and Micrococcus is that Staphylococcus frequently causes infections whereas Staphylococcus often involves in clinical infections.
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