TABLE 2.

Transduction from lysogen Lys Φ933WCm to different E. coli strains and other Enterobacteriaceae in milk and ground beef

Bacterium	Origin	No. of strains	Genotype	Milk	Beef
E. coli O111	Human	1	stx2 negative	−	−
E. coli O127	Human	1	stx2 negative	−	−
E. coli O26	Human	2	stx2 negative	−	−
E. coli O4:H4	Cattle	1	stx2	−	−
E. coli O6:H49	Beef meat	1	stx2	−	−
E. coli O8:H9	Sheep	1	stx2	−	−
E. coli O8:H21	Beef meat	1	stx2	−	−
E. coli O15:H16	Cattle	1	stx2	+	−
E. coli O21:H21	Beef meat	1	stx2	+	−
E. coli O64:H34	Cattle	2	stx2	−	−
E. coli O70:H-	Cattle	2	stx2	−	−
E. coli O91:H-	Sheep	2	stx2	−	−
E. coli O113:H21	Cattle	2	stx2, EHEC hly−	−	−
E. coli O113:H-	Cattle	1	stx2	−	−
E. coli O174:H-	Cattle	1	stx2	−	−
E. coli O162:H7	Cattle	1	stx2	+	+
E. coli O171:H25	Cattle	1	stx2	+	+
E. coli O157:H7	Cattle	30	stx2, eae, EHEC hly	+ (4 strains)	+ (2 strains)
E. coli O157:H7	Environment	5	stx2, eae, EHEC hly	−	−
Shigella sonnei	Human	2		+	+
Shigella flexneri	Human	2		−	−
Klebsiella pneumoniae	Environment	1		−	−
E. coli C600Nal	Laboratory	1		+	+