Parasite Burrows into Brain, Causing Severe Symptoms in Woman
A 30-year-old woman from New England experienced a painful burning sensation in her legs, which was later discovered to be caused by a parasite that had made its way into her brain, her doctors revealed.
Initial Symptoms
The woman’s discomfort started with an unusual burning sensation in her feet. Over the following days, the pain spread up her legs and affected areas became extremely sensitive to touch. Fatigue was another symptom she experienced, which she initially attributed to jet lag from a recent three-week trip to Thailand, Japan, and Hawaii.
Medical Journey
When symptoms persisted, the woman visited an emergency department, but her initial examinations were normal, and she was discharged. Days later, the pain had spread to her torso and arms, and she also developed a headache. A second visit to the emergency department brought temporary relief from medications, but neither visit turned up any significant issues in her exams.
Diagnostic Steps
About a week after the onset of her symptoms, the woman experienced confusion, and her partner took her to the hospital. Although blood tests, kidney function checks, and microscopic examinations of her blood were normal, her eosinophil count was elevated. Eosinophils are white blood cells that the body uses to fight off foreign invaders, including parasites.
Key Discovery
To further investigate, a lumbar puncture was performed to obtain a sample of cerebrospinal fluid surrounding the spinal cord and brain. The test showed a remarkably high level of eosinophils, consistent with eosinophilic meningitis, a rare condition often caused by parasites.
The Parasite Identified
After ruling out other potential causes, doctors concluded that the culprit was rat lungworm (Angiostrongylus cantonensis), a parasite common in many tropical and subtropical regions in Southeast Asia and the Pacific Islands, including Hawaii.
The Life Cycle of the Parasite
The adult form of A. cantonensis lives in rodents. Their larvae are expelled through rodent feces, where they are consumed by slugs and snails. Inside these mollusks, the larvae mature until they are ingested by a rodent, thereby completing the cycle.
Humans can also become infected by ingesting raw or undercooked mollusks, contaminated vegetables, or shellfish that have eaten infected slugs or snails.
Symptoms and Treatment
Not everyone who ingests A. cantonensis experiences symptoms. However, for some, the larvae can migrate to the central nervous system, including the brain, potentially causing severe symptoms within just a few hours of ingestion. These symptoms may include headaches, a stiff neck, vomiting, confusion, tingling or burning sensations, seizures, and vision problems.
The infection often resolves on its own, but antiparasitic medications and corticosteroids can be used to treat more severe cases, reducing inflammation in the nervous system.
Prevention Tips
The U.S. Centers for Disease Control and Prevention (CDC) recommends several precautions to avoid infection with rat lungworms:
- Avoid consuming raw or undercooked snails, slugs, frogs, shrimp, or prawns.
- Wear gloves and wash hands after handling snails or slugs in the garden.
- Thoroughly wash fresh produce, especially in areas where the parasite is endemic.
- Be cautious about eating uncooked vegetables in areas with high infection rates.
Conclusion
This case highlights the importance of recognizing unusual symptoms and seeking medical attention if they persist, especially after traveling to areas where parasitic infections like eosinophilic meningitis are more common. Prevention is key to avoiding such rare, but potentially serious, illnesses.
Have you or someone you know experienced unusual neurological symptoms after traveling? Share your stories and experiences in the comments below. Don’t forget to subscribe to our newsletter for more insightful health updates.
