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Table 2 Total E. coli isolates detected on non-selective (MC) and selective (MC+) media in samples collected from low AMU poultry farms (n=10) in Ireland using either on-farm or conventional hatching systems

From: Antimicrobial resistance in Escherichia coli isolated from on-farm and conventional hatching broiler farms in Ireland

   MacConkey agar (MC, non-selective) MacConkey agar with cefotaxime (MC+, selective for presumptive ESBL/AmpC+ E. coli)
Hatching system Hatching system
Sample day Sample type Conventional hatching On-farm hatching Conventional hatching On-farm hatching
No of isolates No of farms (5) No of isolates No of farms (5) No of isolates No of farms (5) No of isolates No of farms (5)
D0 Sponge Swab 0a   1a 1 0   0  
  Water (Source) 1 1 0   0   0  
  Water (Line End) 0   0   0   0  
  Feed 0   0   0   0  
  Clean Litter 1 1 0   0   0  
D10 Faeces 25 5 25 5 0   10 2
  Water (Line End) 5 3 1 1 0   0  
  Boot swab 25 5 25 5 0   7 2
D21 Faeces 25 5 20 4 5 1 0  
  Water (Line End) 12 3 5 2 0   0  
  Boot Swab 25 5 22 5 4 1 5 2
Total   119   99   9   22  
  1. aWhen present, up to 5 presumptive E. coli isolates per sample were identified and stored