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Table 5 Colorado canine heartworm prevalence by year in counties with documented dog importation from out of state [positive tests/total tests (%)]

From: Dog importation and changes in heartworm prevalence in Colorado 2013–2017

 

2013

2014

2015

2016

2017

Colorado (total)

610/122,585 (0.5)

641/129,433 (0.5)

1007/142,600 (0.71)

1208/155,636 (0.78)

1438/171,208 (0.84)

Adamsa

15/4764 (0.31)

20/4742 (0.42)

35/7454 (0.47)

40/9264 (0.43)

60/8796 (0.68)

Arapahoea

45/16,582 (0.27)

56/17,097 (0.33)

69/18,318 (0.38)

128/20,032 (0.64)

145/22,988 (0.63)

Archuleta

0/16 (0)

0/17 (0)

3/28 (10.71)

0/18 (0)

2/21 (9.52)

Bouldera

78/10,330 (0.76)

60/11,428 (0.53)

129/12,385 (1.04)

143/14,332 (1.0)

174/16,155 (1.08)

Broomfielda

6/703 (0.85)

8/1515 (0.53)

12/1568 (0.77)

15/2451 (0.61)

30/3612 (0.83)

Chaffee

0/1443 (0)

1/70 (1.43)

1/2 (50)

0/7 (0)

0/6 (0)

Clear Creeka

na

na

0/1 (0)

0/2 (0)

0/2 (0)

Costilla

na

0/12 (0)

0/4 (0)

na

0/2 (0)

Deltaa

3/201 (1.49)

1/179 (0.56)

5/171 (2.92)

1/188 (0.53)

0/286 (0)

Denvera

95/22,042 (0.43)

81/24,739 (0.33)

154/26,046 (0.59)

237/26,737 (0.89)

236/29,669 (0.8)

Douglasa

31/11,037 (0.28)

45/11,514 (0.39)

23/12,386 (0.19)

47/14,123 (0.33)

70/15,065 (0.46)

Eaglea

1/221 (0.45)

0/215 (0)

9/279 (3.23)

5/326 (1.53)

5/234 (2.14)

El Pasoa

92/13,849 (0.66)

87/14,592 (0.6)

102/16,121 (0.63)

114/16,661 (0.68)

180/17,598 (1.01)

Elberta

2/562 (0.36)

4/673 (0.59)

4/716 (0.56)

2/776 (0.26)

7/946 (0.74)

Fremonta

12/1254 (0.96)

19/1745 (1.09)

16/1164 (1.37)

12/920 (1.3)

8/832 (0.96)

Garfielda

5/627 (0.8)

3/493 (0.61)

6/702 (0.85)

16/833 (1.92)

8/733 (1.09)

Granda

1/11 (9.09)

0/7 (0)

3/13 (23.08)

3/16 (18.75)

1/10 (10)

Gunnisona

1/48 (2.08)

1/36 (2.78)

2/16 (12.5)

1/78 (1.28)

2/54 (3.7)

Huerfanoa

na

na

na

0/6

(0)

0/51

(0)

Jeffersona

115/20,559 (0.56)

142/21,818 (0.65)

272/24,446 (1.11)

242/25,564 (0.95)

248/26,073 (0.95)

Kit Carson

na

na

na

na

na

La Plataa

10/912 (1.1)

5/858 (0.58)

8/1059 (0.76)

8/942 (0.85)

5/866 (0.58)

Larimera

19/7282 (0.26)

18/7685 (0.23)

37/8061 (0.46)

45/8564 (0.53)

64/10,589 (0.6)

Las Animasa

na

na

na

na

0/1 (0)

Mesaa

15/1085 (1.38)

15/1138 (1.32)

8/1483 (0.54)

25/2357 (1.06)

44/2978 (1.48)

Montezuma

1/186 (0.54)

5/205 (2.44)

4/215 (1.86)

5/297 (1.68)

6/404 (1.49)

Morgan

na

na

0/1 (0)

na

na

Ouray

na

na

na

1/159 (0.63)

3/158 (1.9)

Parka

0/281 (0)

2/428 (0.47)

4/532 (0.75)

6/537 (1.12)

5/590 (0.85)

Pitkina

0/23 (0)

0/11 (0)

1/35 (2.86)

7/232 (3.02)

16/774 (2.07)

Puebloa

17/900 (1.89)

9/838 (1.07)

25/1388 (1.80)

30/1446 (2.07)

40/2358 (1.7)

Rio Blancoa

na

na

na

0/1 (0.0)

0/2 (0)

Routt

2/91 (2.2)

4/110 (3.64)

4/149 (2.68)

3/254 (1.18)

8/350 (2.29)

Summita

12/1634 (0.73)

19/1878 (1.01)

18/2241 (0.80)

18/1963 (0.92)

16/1521 (1.05)

Tellera

1/296 (0.34)

1/279 (0.36)

3/499 (0.60)

6/881 (0.68)

11/1340 (0.82)

Welda

20/4109 (0.49)

33/3751 (0.88)

44/4325 (1.02)

43/5156 (0.83)

37/5748 (0.64)

  1. aMore than 100 dogs imported from out-of-state 2013–2017
  2. Abbreviation: na, not available