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Table 1 Fig. 2. Bacteriophages productivity scores per induction method among the 47 STEC O157:H7 isolates

From: Antimicrobial growth promoters approved in food-producing animals in South Africa induce shiga toxin-converting bacteriophages from Escherichia coli O157:H7.

Bacteriophages infectivity scores

Ultraviolet light

Virginiamycin

Josamycin

Flavophospholipol

Poly 2-propenal 2-propenoic acid

Spontaneous

0 (0 plaques)

4 (16%)

5 (31,3%)

2 (12,5%)

1 (7,1%)

12 (60%)

0

1+ (< 5 plaques)

2 (8%)

4 (25%)

0

5 (35,7%)

1 (5%)

0

2+ (5 to 10 plaques)

15 (60%)

4 (25%)

10 (62,5%)

4 (28,6%)

2 (10%)

6 (85,7%)

3+ (> 10 plaques)

4 (16%)

3 (18,8%)

4 (25%)

4 (28,6%)

5 (25%)

1 (14,3%)

Total induced bacteriophages

25/47

16/47

16/47

14/47

20/47

7/47