(AP) — The mosquitoes that spread the Zika virus are among the hardest species to fight because they live and breed in tub drains, dog bowls, buckets, flower pots and other spots where water collects inside the houses and yards of the people they bite, insect experts noted Monday. Because they stick close to home, Zika-carrying mosquitoes are hard to target with larvacide and insecticide sprays, they said. New Orleans' mosquito control department has lined up laboratories at Louisiana State University and Tulane University that are able to screen mosquitoes caught in surveillance traps for the Zika virus, said department director Claudia Riegel. Harry Savage, chief entomologist with the federal Centers for Disease Control and Prevention, said his best guess is that Zika infections transmitted within the U.S.