A group that works to counter religious groups who promote the “ex-gay” movement has spoken out after a video of a16-year-old boy being “exorcised” of gay demons appeared on the internet.

Truth Wins Out condemned Manifested Glory Ministries in Bridgeport, Connecticut, for practicing child abuse in the name of religion.

“This video reveals the underbelly of the ex-gay ministries and shows the medieval mindset of such organisations,” said Wayne Besen, Executive Director of Truth Wins Out.

“We call on all such ministries to immediately stop the child abuse, which is harm in the guise of healing.

“As an organisation that helps victims of such barbaric practices, we can attest to the psychological trauma that can result.”

The exorcism video shows a teen writhing on the ground as adults implore so-called “homosexual demons” to get out.

The leaders yell at the boy on the ground saying, “Right now in the name of Jesus, I call the homosexuality, right now in the name of Jesus.”

This scene unfolds for 20 minutes with the boy in a near seizure, even vomiting.

Patricia McKinney, pastor of the nondenominational church who describes herself as a prophet, told CNN:

“It’s not just the homosexuality spirit. It could be the alcohol spirit, the crack cocaine spirit, the adultery spirit. Everything carries a spirit.”

TWO said exorcism is a “standard part” of groups such as Exodus International, which promise to help people “pray away the gay.”