It was banned in the Australian state of Queensland until the early-'90s when the Queensland Censorship Board was disbanded.
The first and only film based on a novel by splatter-punk horror writer Shaun Hutson. Hutson admitted to being so unhappy and embarrassed by this film that he never allowed another film to be based on his work, remarking on his website "Do yourselves a favor a don't bother watching it, it's awful!" Though in recent years Hutson has grown a soft spot for it and considers it a guilty pleasure.
The movie was chosen to be part of famous german The Worst Movies of All Time (2013) series. It was aired August 2018 on german TV station Tele5. "SchleFaZ" is a german abbreviation, means "the worst films ever". In that series 2 hosts present the whole film and make fun of it throughout the movie.
Final film of Silvana Mangano.
Came out a year later than a movie it's often either mistaken for or compared to, The Nest, about cockroaches taking over a town in a similar fashion.