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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).