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Table 4 CFU/g faeces on selective MacConkey agar plates with or without neomycin (16 mg/l) before and after neomycin treatment

From: Efficacy of neomycin dosing regimens for treating enterotoxigenic Escherichia coli-related post-weaning diarrhoea in a Danish nursery pig herd not using medicinal zinc oxide

 

Before treatment

After treatment

Control (n = 100)

Single high-dose (n = 68)

p value

Control (n = 100)

Single high-dose (n = 68)

p value

Mean (sd) CFU/g on plates without neomycin

3.3 × 108 (4.4 × 108)

3.4 × 108 (4.9 × 108)

0.877

7.9 × 107 (3.0 × 108)

1.6 × 108 (3.6 × 108)

0.120

Reduction in CFU/g

   

− 2.5 × 108

− 1.8 × 108

 

Mean (sd) CFU/g on plates with neomycin

4.1 × 106 (2.6 × 107)

1.0 × 106 (3.3 × 106)

0.251

6.5 × 107 (2.4 × 108)

4.8 × 107 (1.3 × 108)

0.548

Increase in CFU/g

   

 + 6.1 × 107

 + 4.7 × 107