TABLE 2.

Total and unique E. coli isolates correctly classified into source groups by rep-PCR and HFERP DNA fingerprinting method

Source group% (No.) correctly classifieda
All fingerprints (n = 2,466) (rep-PCR, Pearson)Unique fingerprints (n = 1,535)
rep-PCRHFERP
PearsonJaccardPearsonJaccard
Petb91.8 (279)61.7 (95)45.5 (70)59.1 (91)44.8 (69)
Chicken81.4 (188)59.7 (86)38.9 (56)63.2 (91)31.9 (46)
Cow79.6 (238)55.0 (104)47.6 (90)62.0 (117)48.2 (91)
Deer85.5 (145)55.2 (53)36.5 (35)62.2 (60)42.6 (41)
Waterfowlc81.4 (262)66.2 (150)52.8 (114)70.4 (152)56.5 (122)
Goat97.1 (101)66.7 (27)59.5 (25)47.6 (20)42.9 (18)
Horse69.3 (79)44.3 (35)34.2 (27)52.6 (41)32.1 (25)
Human78.3 (240)59.2 (124)47.4 (100)53.8 (113)45.2 (95)
Pig77.9 (236)63.7 (137)43.7 (94)54.4 (117)36.3 (78)
Sheep79.0 (80)7.5 (29)39.3 (24)37.7 (23)8.2 (5)
Turkey88.6 (179)73.8 (93)52.4 (66)73.0 (92)54.8 (69)
Overall82.2 (2,027)60.9 (933)45.8 (701)59.9 (917)43.0 (659)
  • a Based on Jackknife analysis with 1% optimization and maximum similarities with curve-based (Pearson's product-moment correlation coefficient) or band-based (Jaccard's coefficient) similarity calculations.

  • b Pet group consists of cats and dogs.

  • c Waterfowl group consists of ducks and geese.