A family's cruise ship vacation turns into a living nightmare when their two year old swallows a sinister monster. Then, a mom is plagued with a mysterious infection and deadly parasites hijack the brain of a 6-year-old boy.

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A high school football star contracts a mysterious infection that brings him to the brink of death. Then, a marina dock master suffers crippling pain in his left hand, and what's living inside is the stuff of science fiction.

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A baby falls mysteriously ill and struggles to breathe, and doctors race to uncover the identity of the hidden assassin. Then, what starts out as mild groin discomfort for a globe-trotting man develops into paralyzing pain.

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A toddler begins vomiting and convulsing and is pushed to the edge of death. Then, a neuro-psychiatrist suffers multi-organ failure and one of the deadliest infections on the planet causes legions across a woman's brain. 

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After getting a cut on his knee, a teen becomes feverish and fatigued, and the cause could result in amputation or death. Then, no one suspects something is destroying a young girl's retina. 

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When a teenage boy gradually stops breathing, doctors must bypass his lungs and oxygenate his blood. A personal trainer is afflicted by strange rashes and excruciating nerve pain. 

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A college student contracts something that eats her eyeball, causing headaches and severe light sensitivity. Then, doctors discover something insidious paralyzing a baby's body and threatening his life. 

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A baby nearly dies from something everyone has in their home. Then, a man has worms crawling throughout his lungs and a female boxer is blindsided by a rare infection.

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A baby suddenly loses the ability to use the left side of her body, and doctors discover her brain was infected in utero. Then, a teacher's holidays are ruined by seizures that lead to brain surgery.

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A teen develops rashes that leak pus and blood, and doctors discover he has one of the most feared diseases on the planet. Then, a tough ultra-marathoner is brought to his knees by a deadly infection that's shredding his organs.

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Doctors discover a young boy drowning in his own mucus and on the brink of death is a victim of an infectious outbreak. Then, a mother fears her son has gangrene and takes matters into her own hands.

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A horrendous creature infects the leg of a soccer coach and may lead to amputation and the end of his career. Then, a girl suffers from a brain infection that causes her to act out and threaten suicide.

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In North Carolina, a young couple both start experiencing a deluge of bizarre and terrifying symptoms and the origin of their infections is startling. In Texas, a local councilman experiences strange cravings and baffling weight loss at the hands of a hidden enemy that attacks his blood and organs. In Maryland, a young boy endures extreme nerve pain and rashes across his body. His parents can only lament as the mysterious illness takes him to the edge of death.

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Doctors discover a teenager's brain is under attack when she suffers seizures and blindness, and a young child develops a rash and fever that won't go away.

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A young man with a toothache ends up fighting an infection that threatens to eat him alive. Then, a young boy wastes away in front of his parents' eyes as a mysterious infection overtakes his body.

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A teenager's shoulder pain leads to her being quarantined and facing the possibility of losing her life. Then, a woman struggles through her work week as something causes her body to rot.

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A war veteran that fought in Afghanistan is taken down by an even more mysterious enemy. Then, new parents are horrified when a deadly infection pushes their baby daughter to the brink of death.

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A common sore throat spirals out of control and a teenage girl is left clinging to life. Then, what a world traveler takes for a simple skin irritation turns out to be something far more menacing.

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A contractor suffers a bump on his head and finds himself in the ICU fighting for his life. Then, doctors discover the threat behind a college football player's blinding headaches could easily end his life.

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A man emerges from surgery just in time for Christmas but soon finds himself on the brink of death. Then, a woman is out Christmas shopping when a stabbing pain in her eye is so severe, she believes she sees shadows of worms.

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An EMT is shattered when an emergency call turns out to be her son who is suffering from deadly, inexplicable seizures. Then, a man is reduced to tears when something sinister rips apart his intestines.

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A new father becomes totally incapacitated in a matter of hours, and an international journalist returns to his Maine home and suffers a merciless cycle of pain, fever and an overall sense of doom.

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A teenage girl thinks she's losing her mind, and her family realizes she has a life-threatening inflammation of the brain. Then, a reality television competitor contracts a hideous creature that's attacking her vital organs.

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Doctors discover something is eating the eyes and brain of a newborn boy. Then, an active 11 year old starts talking gibberish and falls into a coma, and a high school graduate suffers a mysterious collapsed lung.

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Doctors race to track down the killer inside a teenager's body when he begins to vomit his own fecal matter. Then, a girl's love of swimming comes back to haunt her when she develops severe headaches, nausea and a bizarre rash.

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A teen dodges death by surviving getting sucked into a tornado, but when his trauma wounds won't heal, doctors discover a hideous infection that's eating his body alive.

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A young Peace Corps volunteer gets the assignment of her dreams in West Africa, but things quickly turn into a nightmare when a deadly organism strikes.

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A globe-trotting couple returns home for Christmas and discovers some stowaways that bite, suck and consume flesh. Then, a man learns something is eating his heart and a desert photographer finds herself knocking on death's door.

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A newly engaged man mysteriously collapses and soon faces complete organ failure, forcing him to make a choice between amputation or death. Then, a mysterious eye infection takes away a college freshman's ability to see.

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A teenage ballerina suffers debilitating migraines and incapacitating muscle failures. Then, a high-tech monster shatters a young boy's life and a young missionary experiences something that literally makes his skin crawl.

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A boy's summer fun is cut short by an apparent flu that suddenly transforms into a life-threatening condition. Then, an extreme case of asthma strikes a former beauty queen and bizarre hallucinations take down an oil rig worker.

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Doctors quarantine a young girl with a lump on her neck and race to save her life. Then, a family's eldest son becomes mysteriously paralyzed and abdominal pain and nausea haunt a mother for over four years.

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A 7-year-old girl suffers mysterious seizures and painful rashes, and winds up in a deadly coma. Then, a college graduate's health spirals viciously out of control when her flu-like symptoms turn out to be a flesh-eating monster.

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In Texas, a budding baseball star suffers from a rare and mysterious infection taking over his brain and causing violent, uncontrollable seizures. Then, doctors discover a ruthless killer eating a toddler from the inside out.

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After surviving premature birth, a baby mysteriously coughs up blood and doctors discover a monster destroying his fragile body from within. Then, doctors uncover something insidious attacking the brain of a college student.

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A young California gymnast strives for stardom until a festering menace in her hand threatens her dreams. Then, an auto specialist in Oregon believes death will be his only relief as something inexplicable drives him to madness.

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A man struck with a swollen face and yellow eyes suffers from an infection that's shutting down his organs. Then, a teen being treated for Lyme disease is forced to drop out of school when her symptoms become intolerable.

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A toddler in Ohio stops eating and suffers bizarre salt cravings, leaving doctors puzzled. Then, an executive in California suffers a ruptured colon that unleashes something potentially fatal across his body.

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In Georgia, a menace brings a successful model entering into motherhood to the brink of suicide. Then, a North Carolina woman watches as an infection eats her son alive during summer break.

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An adventurous traveler from Oregon returns from a trip across South America with a mysterious infection that's devouring his face. In California, a 12-year-old's ability to play football is affected when a monster hits his brain.

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A young mother expecting her second child is suddenly hit with a devastating infection that leaves her in a coma. Then, a runner in Texas discovers her lungs are filled with parasitic worms and doctors struggle to find a cure.

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A pregnant teacher is blindsided by an invader that causes excruciating pain, and doctors must save her baby before it's too late. Then, an upstate New York truck driver nearly goes blind from a parasite.

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A young newlywed suffers horrific seizures and inexplicable delusions caused by a monster hijacking her body. Then, a young basketball player in Ohio is in agony as an insidious creature rips his leg muscles apart.

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An Iraq War veteran pulls a foot-long worm from inside his body. Then, a contractor is unable to breathe after visiting a sushi restaurant, and a woman develops a mysterious rash that could be caused by a dangerous parasite.

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A factory worker in Iowa begins to go blind and doctors realize he's infected with a deadly parasitic killer. Then, doctors discover a young girl's paralyzing seizures are caused by a fatal and elusive parasite.

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Doctors find thousands of silent monsters living in the tissue of a Kentucky mother of five. Then, a New York attorney is paralyzed for months as doctors wait for her immune system to fight parasites on its own.

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A California man explores hookworms as a way to cure his allergies, but when no lab will sell him the parasites, he takes radical action. Then, a 5-year-old girl notices a red dot on her foot that appears to be alive.

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An 8-year-old girl becomes the host of some of the most common parasites in nature. Then, a teen fights to keep from going blind after a fly uses his eye as a breeding ground.

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A seemingly innocent cat scratch leaves a veterinary volunteer with a raised and growing wound on her chest. When it begins to move, she's horrified that something could be growing inside.

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When a 3 year old loses a third of her body weight over a few days, her parents scour their home to find the source of her infection. Then, a veteran firefighter battles an amoeba that's attacking his brain.

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An invisible attacker ravages a fourth grade teacher from the inside out. Then, an insatiable maneater drives a retiree to the brink of insanity.

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A fit dance instructor is suddenly stopped in her tracks by unbearable abdominal pain and a mysterious mass in her colon that is revealed to contain decaying worms. Then, a scientist finds worms living in his skin and eyes.

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A 9-year-old hockey prodigy is attacked by a brain-eating monster and brought to the brink of death. Then, a Boston runner is torn from his training regimen when a lethal beast devours his internal organs.

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In Virginia, a vicious parasite on a rampage targets a child. Then, a brutal killer invades a traveler's blood in Michigan and a summer's day at a Florida lake turns into a nightmare when a ruthless monster attacks a boy's brain.

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A young woman in Virginia is attacked by a brain-eating monster that threatens to take her life. Then, a Midwestern farmer battles a beast that can't be killed and a New Yorker is infected with the deadliest parasite on Earth.

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A deceptive and cunning parasite attacks the cornea of a teenager's eye. Then, a runner contracts a tick-borne illness that doctors think is cancer or malaria and a parasitic worm ravages a man's intestines.

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A New Jersey woman's apartment is infested with bed bugs. Then in Oklahoma, a chemical sprayer's cough turns out to be the result of parasitic worms that multiply in the human lung.

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A mysterious organism strikes a Midwest city, causing the worst parasitic outbreak in US history. In Chicago, doctors must track down a hidden killer that attacks students, and a flesh-eating monster terrorizes a Texas community.

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A creature feeds on the brain tissue of a young boy after he ingests worm eggs, and a killer works its way through the body of a Vietnam veteran, laying waste to his organs and lymph system.

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Hear shocking, true stories about mysterious illnesses caused by some of the smallest creatures alive: parasites. These tiny yet powerful creatures take up residence in unsuspecting hosts and attack the body, causing everything from splitting headaches to blindness to organ failure. On Monsters Inside Me, you’ll hear doctors, friends and family race to unlock the mystery ravaging the victim’s body before it is too late. With direct audio from Animal Planet’s hit TV show, find out how powerful parasites really are.

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