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Table 1 Table of parameters used in the model

From: Surveillance of low pathogenic novel H7N9 avian influenza in commercial poultry barns: detection of outbreaks and estimation of virus introduction time

Parameter

Description

Value

R 0

Basic reproductive

3, 5, 7, 10

 

number

 

γ

Mean latent

2* [27] (Pantin-Jackwood,

 

period (days)

personal communication)

1/(γ/n o )

Average duration spent

0.4

 

in each compartment

 
 

during the latent

 
 

period (days)

 

σ

Mean infectious

6* [27] (Pantin-Jackwood,

 

period (days)

personal communication)

1/(σ/n o )

Average duration

1.2

 

spent in each

 
 

compartment during

 
 

the infectious

 
 

period (days)

 

ρ

Mean time to

8 [24]

 

sero-conversion

 
 

post infection (days)

 

1/(ρ/n c )

Average duration

0.8

 

spent in each

 
 

compartment during

 
 

the sero-converting

 
 

period (days)

 

Sensitivity (ϕ)

Sensitivity of

95% [20, 28, 29]

 

rt-PCR test

 

Specificity

Specificity of

100 % [20, 28, 29]

 

rt-PCR test

 

Sensitivity (η)

Sensitivity of

86% [3032]

 

HI assay

 

Specificity

Specificity of

100 % [3032]

 

HI assay

 

N

Population size

5000*

n o

Number of

5

 

compartments for

 
 

exposed and

 
 

infectious periods

 

n c

Number of seroconverting

10

 

compartments

 

Start time (T s )

Time infection

0, 7, 20, 40

 

is introduced (days)

 
  1. Values of parameters that have an *next to them indicate uncertainty in these values, these values were varied in the sensitivity analysis.