Table 1 Heartworm factors considered for inclusion in the study
From: Factors influencing U.S. canine heartworm (Dirofilaria immitis) prevalence
| Â | Factors | Data available period | Scale | Source |
|---|---|---|---|---|
Climate factors | Annual temperature | 2011 and 2012 | Division | National Climate Data Center (NCDC) |
Annual precipitation | 2011 and 2012 | Division | NCDC | |
Annual relative humidity | 2011 and 2012 | Station | NCDC | |
Geographic factors | Elevation | 2012 | County | |
Percentage forest coverage | 2007 | County | United States Department of Agriculture (USDA) | |
Percentage surface water coverage | 2010 | County | U.S. Census Bureau | |
Societal factors | Population density | 2010 | County | U.S. Census Bureau |
Median household income | 2011 | County | U.S. Census Bureau | |
Mosquito species | Aedes aegypti | 2008 | County | Moore, CG.[15] |
Aedes albopictus | 2012 | County | Hynes NA[16] | |
Aedes canadensis | 2004 | County | RF Darsie, Jr. and RA Ward[17] | |
Aedes sierrensis | 2004 | County | RF Darsie, Jr. and RA Ward | |
Aedes trivittatus | 2004 | County | RF Darsie, Jr. and RA Ward | |
Anopheles punctipennis | 2004 | County | RF Darsie, Jr. and RA Ward | |
Anopheles quadrimaculatus | 2004 | County | RF Darsie, Jr. and RA Ward | |
Culex quinquefasciatus | 2004 | County | RF Darsie, Jr. and RA Ward |