3. Results
3.1. Phylogenetic grouping of E. coli isolates
Seventy E. coli isolates were cultured from 663 mastitis
samples. Among them, 41 (58.6%) belonged to phylo-group
B1, 25 (35.7%) to group A and 4 (5.7%) to group D. None
of the isolates was found to belong to group B2.