Shivers / Rattlers - Shivers / Rattlers - DVD

In Shivers (1975), people are being infected by a strain of parasites that turn them into mindless, sex-crazed fiends out to infect others. In Rattlers (1976), a herpetologist investigating a series of fatal rattlesnake attacks discovers that the creatures have been infected by a mysterious nerve gas disposed of in the desert by the military.