Cats become infected with heartworm disease through the mosquito bites of infected mosquitos. (catcareonline.com)
Any dog can be infected with just a single bite of an infected mosquito, but those in areas that are warm and humid are mostly at a risk to have it since these are where most mosquitoes thrive. (hhsanimals.org)
There is currently no vaccine or treatment for Zika, which is spread primarily through the bite of an infected mosquito, although it can also spread through sexual transmission. (fortune.com)