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Table 3 Adjusted reproduction ratio R a [95% confidence interval] for groups A, B, C, as a function of four different categories

From: Effect of a DIVA vaccine with and without in-feed use of coated calcium-butyrate on transmission of SalmonellaTyphimurium in pigs

Group §

Individual faeces a

Ileum/content/Caecum/content a

Ileocaecal Lnn/tonsils a

All tissues/individual faeces a

A) DIVA vaccine (n = 16)

1.76 [1.02; 9.01]

1.03 [0.56; 3.95]

0.77 [0.35; 3.80]

2.37 [1.46; 10.02]

B) DIVA vaccine + Coated Butyrate (n = 15)

2.52 [0.99; 9.62]

0.50 [0.17; 5.82]

0.37 [0.14; 4.64]

2.52 [0.99; 9.62]

C) Positive control (n = 16) *

+∞ [1.88; +∞]

2.52 [1.02; 9.01]

1.19 [0.70; 7.18]

+∞ [1.88; +∞]

P-value (A, C)

0.22

0.25

0.21

0.37

P-value (A, B)

0.47

0.38

0.21

0.27

P-value (B, C)

0.19

0.31

0.07

0.19

  1. aUsing the ISO method 6579 Annex D, a pig was considered as infected, if at least one of the samples of four marked categories in every column was found positive during the transmission period.
  2. §A) oral vaccination at four and seven weeks of age with 107 - 108 CFU/2 mL of the live ‘Salmoporc-∆rfaJ’strain; B) vaccination of (A) plus feed supplemented with 0.3% coated calcium-butyrate salt; C) positive control that was challenged without being treated.
  3. *+∞ = plus infinity.