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Table 1 Summary of the variables and parameter values or distributions used in the preliminary IAV testing scenario analyses in a broiler chicken flock

From: Quantifying the effect of swab pool size on the detection of influenza A viruses in broiler chickens and its implications for surveillance

Parameter name Parameter description Distribution
LPAIV HPAIV
Infectious period distribution Length of the infectious period for IAV in chickens Gamma: shape = 8.1388, scale = 0.9596 Weibull: shape = 1.965, scale = 2.90
Latent period distribution Length of the latent period for IAV in chickens Gamma: shape = 0.8248, scale = 0.4446 Gamma: shape = 0.89, scale = 0.7145
Adequate contact rate The number of contacts per unit time that a broiler has with other broilers that are adequate to transmit IAV Uniform (0.69–0.77) PERT: minimum = 2.5, mode = 4.77, maximum = 9.0
Disease mortality Proportion of IAV infected birds that succumbs to disease Fixed: 0.5% Fixed: 100%
Flock size The number of broiler chickens per house Log-normal: log mean = 10.0212, log SD = 0.3883 truncated at 13,000 and 50,000 birds Same as for LPAIV
FluDETECT positive proportions The fraction of positives detected by FluDETECT in different pooling schemes Fixed: 58.0%, 55.1% and 44.9% for pools of 5, 6 and 11 respectively Scenario 1: 71% [12], Scenario 2: 71%, 68.1%, 57.9% for pools 5, 6 and 11 respectively