Table 1

*Sources of Escherichia coli* strains**
Serotype	stx	Source

O157:H7^a	stx₂	Human
O113:H21^a	stx₂	Hamburger
O88:H21	stx₂	Hamburger
O91:H21^a	stx₁/stx₂	Hamburger
O171:H2^a	stx₂	Hamburger
O116:H21^a	stx₂	Hamburger
OX3:H21^a	stx₂	Hamburger
O117:H7^a	stx₂	Hamburger
O26:H11	stx₂	Bovine
O111:H^-	stx₁	Bovine

^aShared between cattle and meat. stx: Shiga toxin gene.
Molina et al. BMC Microbiology 2003 3:17 doi:10.1186/1471-2180-3-17