Characterization of Shiga Toxigenic Escherichia coli O157 and Non-O157 Isolates from Ruminant Feces in Malaysia

Table 3

STEC O157 and non-O157 and their virulence profiles.

STEC serogroup	Number of STEC+ samples (%)	Source	Number of isolates	Virulence factors	Lineage	SBI profile
O157:H7^a	6 (4%)	Cattle feces	28^b	, eaeA-γ1, ehxA	II	SY2c
			4^b	, eaeA-γ1 ehxA	II	SY2c
Non-O157^a (unknown)	2 (1.5%)	Cattle feces	1	, , , ehxA	—	—
			1		—	—

Isolates of STEC O157:H7 and non-O157 were only present in samples obtained from farm A. All samples from farms B–F were negative for STEC O157:H7 and non-O157 isolates.
^bOn farm A, 28 of the STEC O157 isolates belonged to one PFGE group (at >92% similarity) and the remaining 4 isolates belonged to another PFGE group.
—: not applicable.