Fig. 1From: Multiple diagnostic tests demonstrate an increased risk of canine heartworm disease in northern Queensland, AustraliaLocation of shelters in Queensland, Australia accessed for the 2020 prevalence surveys where dogs were surveyed for the presence of Dirofilaria immitis antigen. The white circles indicate a location that is associated with the town name, the number in parentheses indicates the number of D. immitis-positive dogs using any test/total number of tested dogs. The shortest (airline) distance between Brisbane and Cairns is 1389.40 km. Image from is Google Earth; data are from SIO, NOAA, U.S Navy, NGA, GEBCO (Image Landsat/Copernicus)Back to article page