What are the types of mastitis in dairy cows?

There are two types of mastitis:

Contagious Mastitis (can be passed from cow to cow by the milking machine): Brucella melitensis, Crynebacterium bovis, Streptococcus, Staphylococcus, Strep. agalatiae are the common bacteria of contagious mastitis.

Environmental Mastitis (mastitis caught by bacteria in the environment): Coliform, E. coli, Pseudomonas aeruginosa, and Klebsiella.