Table 3

Prevalence of virulence genes in E. coli isolated from the feces of humans and various animals

Sourcea (no. of isolates)No. of positive isolates (%)b
stx1stx2stx1 plus stx2eaeeae plus EAFSThSTp
Human (25)2 (8)6 (24)2 (8)
Bison (11)*5 (45.45)
Black bear (48)
Buffalo (5)*1 (20)
Cow (49)*8 (16.32)
Coyote (121)5 (4.13)14 (11.57)7 (5.78)
Deer (89)*1 (1.12)1 (1.112)
Dog (48)1 (2.08)20 (41.66)1 (2.08)2 (4.16)
Horse (19)10 (50)
Donkey (25)5 (20)1 (4)
Bighorn sheep (16)*
Llama (5)
Pony (19)5 (26.31)1 (5.26)
Rabbit (5)1 (20)3 (60)
Mountain goat (20)*1 (5)1 (5)1 (5)
Cougar (20)
Elk (29)*2 (7)
Grizzly bear (20)1 (5)
Ground hog (19)4 (21.05)3 (15.78)
Total (n = 593)1 (0.1)33 (5.56)9 (1.5177)60 (10.11)8 (1.349)2 (2.337)2 (0.337)
  • a *, ruminants (all other animal sources are nonruminants).

  • b No isolates were positive for LT or ipaH.