Parasites, both literal and metaphorical, have long been a source of fascination and horror in cinema. This curated list of films delves into the unsettling world of parasitic relationships, showcasing the diverse ways in which these creatures or concepts can infiltrate and disrupt human lives. From body horror to psychological thrillers, these films offer a chilling exploration of dependency, control, and survival, providing viewers with a unique lens through which to view the human condition.

Shivers (1975)
Description: Residents of an apartment complex are infected by a parasite that turns them into sex-crazed maniacs, exploring themes of bodily autonomy and societal decay.
Fact: David Cronenberg's first feature film, it was initially banned in several countries for its explicit content.


Invasion of the Body Snatchers (1978)
Description: A remake of the 1956 film, it explores the fear of losing one's identity to emotionless alien duplicates.
Fact: This version is often considered superior to the original due to its updated special effects and the chilling performance by Donald Sutherland.


The Thing (1982)
Description: An alien life form that assimilates other organisms is discovered in Antarctica, leading to paranoia and isolation among the crew.
Fact: John Carpenter's film is known for its practical effects, which were so realistic they were often mistaken for CGI. The film's ending is famously ambiguous.


The Fly (1986)
Description: A scientist's experiment goes horribly wrong, turning him into a human-fly hybrid, exploring themes of identity and bodily autonomy.
Fact: David Cronenberg's remake of the 1958 film is considered a classic in body horror. The film's special effects were groundbreaking for their time.


The Faculty (1998)
Description: High school students discover that their teachers are being replaced by alien parasites, exploring themes of conformity and rebellion.
Fact: Robert Rodriguez directed this film, which features a young cast including Josh Hartnett and Elijah Wood. It's a blend of teen drama and sci-fi horror.


The Host (2006)
Description: A creature from the Han River abducts a young girl, leading her family on a quest to save her, with themes of environmental impact and family bonds.
Fact: Directed by Bong Joon-ho, this film was South Korea's highest-grossing film at the time of its release. It subtly critiques American military presence in South Korea.


The Ruins (2008)
Description: A group of friends on vacation in Mexico encounter a deadly plant that feeds on human blood, delving into themes of nature's indifference to human life.
Fact: The film was based on a novel by Scott Smith, who also wrote the screenplay. The plant in the film was created using a combination of practical effects and CGI.


Parasite (2019)
Description: A metaphorical take on parasitism, this film examines class struggle and the dynamics between the rich and the poor.
Fact: The first non-English language film to win the Best Picture Oscar. It also swept the Cannes Film Festival, winning the Palme d'Or.


The Blob (1958)
Description: An alien amoeba-like creature grows by consuming everything in its path, symbolizing the fear of the unknown and uncontrolled growth.
Fact: The film was remade in 1988 with a more graphic depiction of the Blob's effects. The original's special effects were quite innovative for the time.


Slither (2006)
Description: A small town is overrun by alien parasites that turn people into grotesque, zombie-like creatures, highlighting themes of invasion and control.
Fact: James Gunn's directorial debut, this film blends horror with dark comedy. The film features a cameo by Michael Rooker, who later worked with Gunn in Guardians of the Galaxy.
