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Zoonotic Disease in Colorado 2015-2020
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Zoonotic disease in Colorado, 2016-2021


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2021 Colorado Annual Zoonoses Report

Report

Year

Five-year average

2016

2017

2018

2019

2020

2021

Anthrax

0

0

0

0

0

0

0

Brucellosis

0

0

3

2

1

1

1

Chikungunya

0

2

0

2

1

1

3

Colorado Tick Fever

3

3

1

4

1

2

2

Dengue

19

5

9

32

4

14

4

Hantavirus

11

4

5

1

1

4

3

Lyme disease

0

4

2

8

**

4

**

Malaria

25

32

23

38

11

26

18

Plague

0

0

0

0

2

0

1

Psittacosis

0

0

1

0

0

0

0

Q-Fever, Acute

3

6

9

3

0

4

7

Q-Fever, Chronic

2

0

0

2

2

1

0

Rabies, Human

0

0

0

0

0

0

0

Rabies, Animal

88

165

325

163

92

167

84

Rickettsioses (including RMSF and typhus)

4

10

7

4

2

5

3

Tick-borne Relapsing Fever

5

3

1

1

3

3

2

Tularemia

14

5

6

6

1

6

3

West Nile Virus

149

68

96

122

35

94

175

Zika

57

7

0

0

0

13

0

*Case counts represent residence in Colorado at time of diagnosis and do not indicate where the patient was infected with the indicated disease.

** Lyme disease investigations are on hold due to limited capacity during the pandemic.