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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