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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