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Table 1 Estimation of the transmission parameters [95 % Confidence Interval] for MDA + H ( n = 26), MDA + L ( n = 7) and MDA − ( n = 33) piglets

From: Maternally-derived antibodies do not prevent transmission of swine influenza A virus between pigs

 

Transmission rates

Susceptibility factors

BIC

β (days −1 )

β air (days −1 )

σ H

σ L

Model 1

2.48

[1.08–4.56]

1.43

[0.64–2.74]

0.38

[0.20–0.72]

0.92

[0.35–2.18]

127.3

Model 2

2.43

[1.09–4.23]

1.41

[0.64–2.63]

0.39

[0.21–0.70]

–

116.2

Model 3

2.60

[1.20–4.69]

1.35

[0.60–2.62]

0.45a

[0.25–0.83]

119.4

  1. Overall population estimate applying to MDA +H and MDA +L piglets; BIC: Bayesian Information Criteria
  2. With β being the direct transmission rate, β air the airborne transmission rate, σ H the susceptibility factor for MDA +H piglets and σ L the susceptibility factor for MDA +L piglets.
  3. Model 1: different susceptibility factors for MDA +H , MDA +L and MDA− piglets (σ H  ≠ σ L and σ H,L  < 1).
  4. Model 2: same susceptibility factor for MDA +L and MDA− piglets (σ L = 1 and σ H  < 1).
  5. Model 3: same susceptibility factor for MDA +H and MDA +L piglets (σ H  = σ L et σ H,L  < 1).
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Veterinary Research

ISSN: 1297-9716