38 Parasites Found in Woman’s Brain Years After Pork Tapeworm Infection

Lowri Denman never imagined that a tapeworm she passed more than a decade ago would later be linked to dozens of parasites growing inside her brain.

The 42-year-old woman from the United Kingdom has drawn global attention after doctors discovered 38 parasite cysts in her brain following a series of seizures, highlighting the dangers of infections associated with the pork tapeworm and the importance of proper food safety and hygiene.

According to reports, Denman passed a tapeworm measuring about one metre long in 2010 while using a restaurant restroom. Although she sought medical attention, initial tests reportedly showed no major health concerns.

A year later, she suffered her first seizure. Further medical investigations, including brain scans, revealed that she had neurocysticercosis, a disease caused by the larvae of the pork tapeworm, Taenia solium. Doctors found 38 cysts lodged in her brain.

Medical experts say neurocysticercosis is one of the world’s leading causes of acquired epilepsy, particularly in regions where sanitation is poor and pork is not adequately inspected or cooked.

Although the parasite is commonly associated with pork, health professionals warn that the disease is often misunderstood.

People can become infected with the adult pork tapeworm after eating raw or undercooked pork containing tapeworm larvae. However, neurocysticercosis develops when microscopic tapeworm eggs are swallowed through contaminated food, drinking water or unwashed hands. Once inside the body, the eggs hatch, enter the bloodstream and can travel to the brain, where they form cysts.

Because of this, experts say even people who have never eaten pork can develop the disease if they consume food or water contaminated with tapeworm eggs from an infected person.

The infection can remain hidden for months or even years. Symptoms often appear only after the parasites begin to die, triggering inflammation in the brain.

Common warning signs include seizures, persistent headaches, nausea, vomiting, weakness, numbness, balance problems, blurred vision and changes in memory or behaviour.

Doctors diagnose the condition using CT or MRI scans, supported by blood tests and a patient’s medical history. Treatment varies depending on the number and location of the cysts but may include anti-parasitic drugs, anti-seizure medication and medicines to reduce brain inflammation. Surgery may be required in severe cases.

Health experts say the disease is largely preventable through proper hygiene, safe drinking water, improved sanitation and thoroughly cooking pork before consumption. They also stress the importance of treating people carrying the adult pork tapeworm to prevent further spread of the parasite.

Denman’s case has renewed awareness of the potentially serious health risks posed by the pork tapeworm and serves as a reminder that simple hygiene practices and safe food preparation can significantly reduce the risk of infection.