Mimic

Summary: A disease carried by common cockroaches is killing children in Manhattan. In an effort to stop the epidemic, entomologist Susan Tyler (Sorvino) creates a mutant breed of insect that secretes a fluid to kill the roaches. This mutant breed was engineered to die after one generation, but three years later Susan finds out that the species has survived and evolved into a large, gruesome monster that can mimic human form.