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Table 1 Parameters and values used for calculation of R0

From: Estimating the temporal and spatial risk of bluetongue related to the incursion of infected vectors into Switzerland

Symbol

Unit

Biological meaning

Values

Reference

m

midge/trapping night

Vector density (average)

1–584

[5]

a

bite/day

Vector biting rate

0.25

[15]

b1

successful bites/midge

Transmission from vector to cattle

0.01

[28]

b2

%infectious bite/infected host

Transmission from cattle to vector

0.9

[26]

r

cattle/day

Recovery rate of cattle

0.04

[17]

λ

cattle/day

Cattle death rate

0.00008

[17]

e

 

2.718

2.718

Universal value

μ

vector/day

Vector death rate

0.1–0.6

[29]

Ï„

Days

Extrinsic incubation period

4–28

[28]

  1. Symbols and their biological meaning used to calculate BT transmission values for Switzerland