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Table 4 Heartworm prevalence in Colorado and the USA by year

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

Year

Colorado

USA

Prevalence (%)

Percent Change Since 2013

Prevalence (%)

Percent Change Since 2013

2013

0.498

1.11

2014

0.495

−0.6

1.18

6.3

2015

0.706

41.8

1.23

10.8

2016

0.776

55.8

1.28

15.3

2017

0.840

68.7

1.34

20.7