Parasite

Parasite is a movie starring Robert Glaudini, Demi Moore, and Luca Bercovici. In a post-apocalyptic USA, a doctor/scientist infected with a new strain of parasite ends up in a small desert town, trying to find a cure.
Paul Dean has created a deadly parasite that is now attached to his stomach. He and his female companion, Patricia Welles, must find a way to destroy it while also trying to avoid Ricus, his rednecks, and an evil government agent named Merchant.