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Table 4 Virulence genes in E. coli isolated from piglet feces

From: Zinc phosphate-based nanoparticles as alternatives to zinc oxide in diet of weaned piglets

  STa STb Stx2 F4 F18 STb/F4 STb/F18 STa/STb Stx2/F18 Stx2/STb Number of isolates/positive Positive piglets/piglets with diarrhea
Day 0
 Control 1 1 15/2 2/0
 ZnA 500 1/1a 1 16/2 2/1
 ZnA 1000 16/0
 ZnA 2000 13/0
 ZnC 500 15/0
 ZnC 1000 12/0
 ZnC 2000 10/0
 ZnO 500 11/0
 ZnO 1000 12/0
 ZnO 2000 1 16/1 1/0
Day 5
 Control 1 5/3 a 5/2 a 12/11 10/5
 ZnA 500 4 1/1 a 4/1 a 1 1 13/11 9/2
 ZnA 1000 1 2/1 a 7/4 a 1 12/11 10/5
 ZnA 2000 3 1 8/3 a 12/12 10/3
 ZnC 500 1 2 5/2 a 12/8 8/2
 ZnC 1000 12/0
 ZnC 2000 11/0
 ZnO 500 2 11/2 2/0
 ZnO 1000 1 1 5/3 a 10/7 6/3
 ZnO 2000 5/3 a 1 12/6 6/3
Day 10
 Control 15/0
 ZnA 500 7/3 a 8/7 7/3
 ZnA 1000 6/2 a 1 11/7 6/2
 ZnA 2000 4/1 a 3 1 13/8 6/1
 ZnC 500 22/0
 ZnC 1000 3 5/3 3/0
 ZnC 2000 2 12/2 2/0
 ZnO 500 2 2 4 26/8 5/0
 ZnO 1000 5 17/5 4/0
 ZnO 2000 1 2 18/3 3/0
Day 20
 Control 3 17/3 2/0
 ZnA 500 1 6/1 1/0
 ZnA 1000 1 7/1 1/0
 ZnA 2000 4/2 a 11/4 2/1
 ZnC 500 2 2 22/4 4/0
 ZnC 1000 2 1 15/3 3/0
 ZnC 2000 2 5/1 a 15/7 6/1
 ZnO 500 5 2 2 1 14/10 5/0
 ZnO 1000 7 1 14/8 4/0
 ZnO 2000 1 11/1 1/0
  1. a Number of genotypes associated with diarrhea