Cysticercosis

Cysticercosis is a parasitic infection caused by the larval stage (cysticerci) of the pork tapeworm, Taenia solium. It occurs when humans ingest tapeworm eggs, leading to cysts forming in various tissues like the brain, muscles, or eyes. This disease is most common in developing regions with poor sanitation and free-ranging pigs.

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What is Cysticercosis?

The presence of cysts in human tissues was recognized even in ancient times. However, the connection between these cysts, the pork tapeworm (*Taenia solium*), and human disease became clearer in the 19th century with advancements in parasitology. Today, neurocysticercosis is recognized as the leading cause of acquired epilepsy worldwide.

Symptoms

  • Neurocysticercosis (brain cysts): Seizures (most common), headaches, hydrocephalus, focal neurological deficits (e.g., weakness), altered mental status.
  • Muscular cysts: Often asymptomatic, but can cause muscle pain or weakness, or visible lumps.
  • Ocular cysts (eye cysts): Visual disturbances, blurred vision, pain, inflammation, retinal detachment.
  • Subcutaneous cysts: Palpable, movable, non-tender nodules under the skin.

Transmission

Humans contract cysticercosis by ingesting microscopic eggs of the *Taenia solium* tapeworm. This typically occurs through consumption of food or water contaminated with fecal matter from a person harboring an adult *Taenia solium* tapeworm. Direct hand-to-mouth transfer of eggs from an infected individual can also occur. Once ingested, the eggs hatch, and larvae then migrate and form cysts in various tissues.

Contagious Period: Varies by disease

Prevention

  • Wash hands thoroughly with soap and water after using the toilet and before handling food.
  • Cook pork to safe temperatures (minimum 145°F/63°C with a 3-minute rest).
  • Wash and peel fruits and vegetables, especially when traveling in endemic areas.
  • Ensure access to safe drinking water and avoid unboiled tap water.
  • Improve sanitation and hygiene practices, particularly pig rearing and waste disposal, in endemic areas.

Active Outbreaks & Recent Cases

Real-time intelligence from global health monitoring and AI-powered surveillance

Data sources: BEACON, ProMED, WHO, CDC, and 50+ national health agencies

No Active Outbreaks Detected

Our AI-powered surveillance hasn't detected significant Cysticercosis activity in the past 30 days.

Real-time monitoring continues 24/7 across BEACON, ProMED, WHO, CDC, and 50+ global health agencies

What This Means

Currently, Cysticercosis case counts are within baseline expectations globally. However, diseases can emerge rapidly, which is why continuous monitoring is critical.

Stay Prepared

Download the Virus Watcher app to get instant alerts if Cysticercosis activity increases in your region or travel destinations.

Prevention Remains Important

Even without active outbreaks, understanding Cysticercosis prevention helps protect you and your community:

  • Wash hands thoroughly with soap and water after using the toilet and before handling food.
  • Cook pork to safe temperatures (minimum 145°F/63°C with a 3-minute rest).
  • Wash and peel fruits and vegetables, especially when traveling in endemic areas.
  • Ensure access to safe drinking water and avoid unboiled tap water.
  • Improve sanitation and hygiene practices, particularly pig rearing and waste disposal, in endemic areas.
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Expert Resources & References

Trusted information from leading health organizations

CDC

Official guidance from the U.S. Centers for Disease Control and Prevention

View CDC Resources →

WHO

Global disease surveillance and guidelines from the World Health Organization

View WHO Resources →

Research

Latest peer-reviewed research and clinical studies

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Medically Reviewed Content

Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.

Last reviewed: 2026-06-03

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