For years, Rosalio Culit, a self-described healer from the Philippines, has been treating the sick by allowing them to be bitten by venomous pit vipers.

Rosalio Culit, also known as Datu Kamandag among his fellow Manobo tribe members in Surigao del Norte, Mindanao, is a controversial healer who uses viper venom to treat various ailments. He claims that he only discovered the curative properties of snake venom by accident, after being bitten by one of his pet pit vipers many years ago. At the time, he was battling several illnesses, but just days after being bitten by the snake, he felt a lot better, so he deduced that the bite had cured him. He has been preaching the benefits of the North Philippine temple pit viper (Tropidolaemus subannulatus) venom ever since, and has made a name for himself as a snake healer.