Cases of disease spread by pests such as ticks, fleas, and mosquitoes have tripled nationwide in the U.S. since 2004. Here Aedes aegypti mosquitoes, responsible for transmitting Zika, sit in a petri dish. (AP Photo/Felipe Dana, File)
Cases of disease spread by pests such as ticks, fleas, and mosquitoes have tripled nationwide in the U.S. since 2004. Here Aedes aegypti mosquitoes, responsible for transmitting Zika, sit in a petri dish. (AP Photo/Felipe Dana, File) Felipe Dana AP
Cases of disease spread by pests such as ticks, fleas, and mosquitoes have tripled nationwide in the U.S. since 2004. Here Aedes aegypti mosquitoes, responsible for transmitting Zika, sit in a petri dish. (AP Photo/Felipe Dana, File) Felipe Dana AP