TABLE 1

Number of isolates of E. coli O157:H7 PFGE subtypes and phage groups from feces of each steer

Steer type and no.aNo. of isolates
E. coli O157:H7 PFGE subtype (n = 41)bPhage groupc
123456αβγ
LS
    203115
    10413
    17111
    1761517
    190511
SS
    219711
    22211
    23611
    261121
    342173
    6511331
  • a Supershedders (SS) and low shedders (LS) were categorized from one fecal grab sample collected at a commercial feedlot (n = 11 animals).

  • b E. coli O157:H7 subtypes (n = 41) are based on ∼90% similarity among isolates.

  • c Phage groups (n = 41) are based on genome size.