Table 1 Definition and value of parameters

Person

 β₁

Person-to-person transmissibility coefficient

–

(Person*day)⁻¹

Model fitting

 κ

Relative transmissibility coefficient of unapparent infection

1

1

–

 p

Proportion of latent infection

0.043

1

Ref. [41]

 1/ω₁

Incubation period

11

Day

Ref. [42]

 1/γ

Infectious period of dominant infection

14

Day

Ref. [44]

 1/γ'

Latent infection period

14

Day

–

 f

Fatality rate

0.16

1

Ref. [5]

 br

Birth rate

0.009481

1

Statistical Yearbook of Jiangsu Province

 dr

Mortality rate

0.007003

1

Statistical Yearbook of Jiangsu Province

Ticks

 β₂

Coefficient of transmissibility between ticks

0

(Pieces*day)⁻¹

–

 β_2-1

Coefficient of tick-to-human transmissibility

8β₁

(Person*day)⁻¹

Ref. [34]

 β_2-3

Coefficient of tick-to-host infection

8β₁

(Pieces*day)⁻¹

Ref. [34]

 1/ω₂

Incubation period of ticks

7

Day

Ref. [26]

Host animal

 β₃

Coefficient of transmissibility between host animal

2β₁

(Pieces*day)⁻¹

Ref. [34]

 β_3-1

Coefficient of transmissibility rate of host animal to human

2β₁

(Pieces*day)⁻¹

Ref. [34]

 β_3-2

Coefficient of host animal infection to ticks

8β₁

(Person*day)⁻¹

Ref. [34]

 1/ω₃

Host animal incubation period

12

Day

Ref. [39]

 j

Rate of host animal discharge to the environment

10

–

Ref. [35]

Environment

 β_w

Coefficient of transmissibility rate of the environment to humans and host animals

9β₁

(Human/animal*day)⁻¹

Ref. [34]

 W

Environmental tick density

0.047494291

One km²/person (flag hour)

Jiangsu Province surveillance data