The Disembodied (movie, 1957)

When men on a photo safari stumble into a misanthropic doctor’s remote camp with a wounded comrade, the doctor's restless wife supplements her usual pursuit (voodoo, especially as a way to off her husband) with a new one: seduction. As men lose their hearts (sometimes literally) to the alluring voodoo priestess, she embarks on a killing spree that turns the jungle blood red.