A Glint of Exoskeleton

"The mosquitoes have engineered a new disease to wipe out the human race. Thirteen year-old Crick and her best friend (a cockroach named Peri) embark on a desperate mission to stop them. Their mission takes them to tropical Panama, where the mosquito leader is marshalling her forces. But more than just mosquitoes await Crick and Peri, and soon they are running for their lives"--Publisher's website.