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Table 1 The prevalence and distribution of Salmonella in the old layer farm

From: Recovery of Salmonella isolated from eggs and the commercial layer farms

Origins

Na

Salmonella serotypes

Prevalenceb

S. Derby

S. Braenderup

S. Enteritidis

S. Jerusalem

S. Bovismorbificans

Un-identified

External environment of the henhouse

 Disinfection system

5

1

     

20.0% (1/5)

 Soil

15

5

 

3

2

  

66.7% (10/15)

 Feces

13

11

  

1

  

92.3% (12/13)

 Dust

6

5

     

83.3% (5/6)

 Gutter

3

1

    

1

66.7% (2/3)

Internal environment of the henhouse

 Wet curtain cooling system

3

2

   

1

 

100% (3/3)

 Cage

6

5

     

83.3% (5/6)

 Egg nest

6

6

     

100% (6/6)

Total

57

36

 

3

3

1

1

77.2% (44/57)

  1. aSample number
  2. bThe prevalence of Salmonella was among the samples in different sampling site