Shiga Toxin-Producing Escherichia coli Isolated from Bovine Mastitic Milk: Serogroups, Virulence Factors, and Antibiotic Resistance Properties

Table 6

Distribution of virulence factors in Escherichia coli subtypes isolated from bovine mastitis.

Subtypes	Number of positive samples	Virulence gene
Nondetected	26 (35.61%)	—
EHEC	11 (15.06%)	stx1, eaeA, ehly: 11 (100%)
AEEC	36 (49.31%)	stx1: 28 (77.77%)
		stx2: 5 (13.88%)
		eaeA: 20 (55.55%)
		stx1, eaeA: 23 (63.88%)
		stx2, eaeA: 8 (22.22%)
		stx1, stx2, eaeA: 5 (13.88%)
Total	73 (27.23%)