When doctors diagnose neurological diseases like multiple sclerosis (MS), they rely heavily on the presence of lesions seen on MRI scans. Lesions appear as white spots in the brain or spinal cord and are considered a hallmark of MS. 

But here’s the crucial question: what actually causes these lesions?

For decades, the medical system has told us that lesions come from the immune system “attacking our tissue.” Yet extensive scientific evidence shows something different: parasites are well-documented causes of lesions in the central nervous system (CNS).

This article will walk through what lesions are, how parasites create them, which parasites are known to do so, and why this matters deeply for people suffering from MS and other chronic neurological diseases.

What Are CNS Lesions?

Lesion are abnormal areas of brain or spinal cord tissue. Lesions present in MS and other diseases are initiated by inflammation, which is the immune system’s response to an invader.

Different types of lesions caused by infections in the central nervous system (CNS) include abscesses, meningitis, encephalitis, granulomas, infarctions, and cysts, which can be found across a range of neurological diseases. These lesions are caused by bacterial, viral, fungal, protozoal and prionic infections.

Types of Lesions Caused by Parasites

Research shows that lesions caused by parasites include:

Granulomatous Lesions immune cells surround parasites or their eggs

  • Granulomas are formed by immune cells (macrophages, T cells, eosinophils) surrounding persistent parasites, commonly seen in infections such as schistosomiasis, tuberculosis, and other parasitic diseases.

Cystic Lesions — fluid-filled sacs formed by parasites, such as tapeworm larvae

  • Parasitic infections (especially Taenia solium) can form fluid-filled cysts (cysticercosis) in tissues, including the brain (neurocysticercosis), muscles, or eyes.

Abscesses — pus-filled inflammatory pockets

  • Abscesses are collections of pus caused by infection (often bacterial; or other parasitic) and are a hallmark of localized, intense inflammatory response.

Encephalitis or Meningitis Lesions — widespread inflammation in brain tissue or meninges

  • Encephalitis refers to inflammation of the brain itself, and meningitis affects the meninges (brain/spinal cord membranes), with both conditions linked primarily to infection (viral, bacterial, fungal, or other parasites) and often seen in either one or several areas of the CNS.

Myelitis Lesions — inflammatory damage in the spinal cord

  • Myelitis (including transverse myelitis) is characterized by inflammation and immune-mediated demyelination or necrosis in the spinal cord, with lesions seen on imaging caused by infections.

Cerebral Infarction — stroke caused by vascular compromise from infectious endarteritis (e.g., fungal vascular invasion)

  • Infections such as endocarditis or invasive fungi can cause cerebrovascular complications, resulting in cerebral infarction (stroke), hemorrhage, and mycotic aneurysm due to vessel wall invasion or septic emboli.

Ring-Enhancing Cysts — observed in parasitic infections (e.g., neurocysticercosis) or certain abscesses

  • On MRI/CT, ring-enhancing brain cysts are classic for neurocysticercosis but may also represent abscesses or other parasitic or bacterial infections.

Spongiform Change — observed in prion diseases such as Creutzfeldt–Jakob disease, causing characteristic vacuolated lesions

  • Spongiform change, characterized by brain vacuolation, is the pathological hallmark of prion diseases like Creutzfeldt–Jakob disease.

Vascular Abnormalities — fungal infections causing hemorrhagic stroke or aneurysms due to vessel wall invasion

  • Fungal infections (e.g., Aspergillus, Mucor) can invade blood vessel walls, leading to aneurysm, hemorrhagic stroke, or vascular infarction.

Necrotic Lesions — some infections lead to necrosis, particularly with aggressive fungal pathogens

  • Severe infections, especially due to aggressive fungi or bacteria, may cause necrotic lesions in tissue as a result of direct pathogen action and immune-mediated tissue.

Lesions can produce symptoms like seizures, paralysis, poor balance, vision loss, spasticity, headaches, cognitive decline and many others. Some lesions are active (inflamed) while others become inactive scars or calcifications. But every lesion begins as inflammation — and in parasitic infections, this inflammation comes from the immune system fighting invaders, not from the body “attacking itself.”

How Parasites Create Lesions

Parasites reach the CNS in several ways:

  • Crossing the blood-brain barrier through the bloodstream.
  • Carried inside infected immune cells (the “Trojan horse” method).
  • Traveling along nerves, such as the olfactory nerve.
  • Egg embolization, where parasite eggs get stuck in small blood vessels.

Once inside, parasites trigger damage in multiple ways:

  • Direct invasion of neurons and glial cells.
  • Release of toxins and enzymes that destroy tissue.
  • Granulomas formed by immune cells around parasites or eggs.
  • Blocked blood vessels, leading to ischemia, edema, and necrosis.

The result: pockets of inflammation and scarring that appear as lesions on MRI and histopathology.

Parasites Known to Cause CNS Lesions

1. Toxoplasma gondii

  • Produces ring-enhancing lesions seen on MRI, often in the basal ganglia.
  • Causes encephalitis, seizures, and confusion.
  • Disrupts glutamate regulation in the brain, leading to nerve injury.

2. Plasmodium falciparum (Cerebral Malaria)

  • Creates multiple lesions including microhemorrhages and necrosis.
  • Infected red blood cells stick to brain vessels, blocking oxygen supply.
  • Leads to coma, seizures, and long-term cognitive issues.

3. Trypanosoma cruzi (Chagas Disease)

  • Infects neurons, astrocytes, and glial cells.
  • Causes meningoencephalitis, glial nodules, and amastigote nests.
  • Associated with edema, neuronal loss, and inflammatory infiltrates.

4. Free-Living Amoebae

  • Naegleria fowleri: produces acute, hemorrhagic brain lesions (rapidly fatal).
  • Acanthamoeba: causes chronic ring-enhancing lesions in immunocompromised hosts.

5. Taenia solium (Neurocysticercosis)

  • Larval tapeworms create cysts in the brain.
  • Lesions progress through stages: vesicular → ring-enhancing → nodular → calcified.
  • Leading cause of adult-onset seizures worldwide.

6. Echinococcus (Hydatid Disease)

  • Produces large, thin-walled cystic lesions.
  • Can compress surrounding brain tissue or rupture, causing severe inflammation.

7. Schistosoma (Blood Flukes)

  • Cerebral schistosomiasis: granulomatous lesions around eggs in the brain.
  • Spinal schistosomiasis: lesions in the spinal cord leading to paralysis.

8. Paragonimus (Lung Fluke)

  • Migrates from lungs to the brain, leaving behind hemorrhagic and granulomatous lesions.
  • Migration tunnels are lined with vascular injury and inflammation.

9. Toxocara and Baylisascaris

  • Toxocara (dog/cat roundworm): causes spinal cord lesions and myelitis, sometimes misdiagnosed as MS.
  • Baylisascaris (raccoon roundworm): produces widespread white-matter lesions with severe neurological decline.

Clinical Consequences of Parasitic Lesions

Lesions caused by parasites can lead to:

  • Seizures and epilepsy.
  • Hydrocephalus (fluid buildup from blocked flow).
  • Spasticity, weakness, poor balance, and paralysis.
  • Chronic headaches and migraines.
  • Vision loss (if the optic nerve is involved).
  • Cognitive decline and memory problems.

Studies confirm these lesions produce neurological symptoms in both humans and animal models.

Why This Is So Important

Doctors who diagnose MS focus on finding lesions on MRI scans. But they don’t know what causes the lesions. Instead, they assume that lesions are caused by the immune system attacking nerve tissue. This theory is scientifically flawed.

The evidence is clear:

  • Parasites are capable of producing all types of central nervous system lesions described in MS and other diseases.
  • Lesions are always the result of inflammation — inflammation is the immune system’s response to infection.
  • The immune system is not flawed; it fights infections, not healthy tissue.
  • By ignoring parasites, the medical system misses the true cause — and the opportunity to actually treat the cause of disease allowing people to recover and live a healthy life.

The Bottom Line

Lesions are not the disease themselves. They are the battle ground where the immune system fights infection. And the research shows that parasites — protozoa, worms, and amoebae — are well-documented causes of brain and spinal cord lesions.

This is more than an academic point. It is powerful evidence that MS and other chronic neurological diseases are driven by parasitic infections, not by autoimmunity.

By shifting the focus from suppressing the immune system to identifying and treating parasitic infections, we can move from disease management to true recovery — preventing suffering and restoring lives.

There are real solutions to recover from parasites today!

To restore health, we must focus on treating the cause of inflammation, which are parasites. First, identify the enemy (parasites), then support the body and treat the parasites while following a holistic approach. When parasitic infections are treated effectively, we can overcome inflammation or disease.

If you’re frustrated with the fact that our standard of care STILL doesn’t offer a real solution for treating MS and other diseases, then click on the link below to watch Pam Bartha’s free masterclass training and discover REAL solutions that have allowed Pam and many others to live free from MS and other diseases.

CLICK Here to watch Pam’s masterclass training

 

References:

  1. Carpio FJ. Parasitic diseases of the central nervous system: lessons for clinicians and policy makers. J Neurol Sci. 2016;360:41-44. Available from:https://pmc.ncbi.nlm.nih.gov/articles/PMC4926779/
  2. Garcia HH, Araoz R, Lescano AG, et al. Parasitic infections of the nervous system. Infect Dis Clin North Am. 2021;35(3):597-618. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC8805156/
  3. Sánchez-López E, Carrillo-Sánchez K, Roldán M, et al. Trypanosoma cruzi Central Nervous System Infection—Pathogenesis, Clinical Manifestations, Diagnosis, and Treatment. Pathogens. 2023;12(11):1502. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC11233130/
  4. Del Brutto OH. Revised diagnostic criteria for neurocysticercosis. Int J Infect Dis. 2017;32:148-160. Available from: https://www.sciencedirect.com/science/article/pii/S0022510X16307481
  5. Cangalaya C, Vicuña Y, Bart JM, et al. Perilesional inflammation in neurocysticercosis. PLoS Negl Trop Dis. 2016;10(7):e0004869. Available from: https://journals.plos.org/plosntds/article?id=10.1371/journal.pntd.0004869
  6. L’Ollivier C, Kechemir-Issad N, Guarneri C, et al. Histological and molecular biology diagnosis of neurocysticercosis. Parasitology. 2012;139(1):1-10. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC3671466/
  7. Pittella JEH. Pathology of CNS parasitic infections. Handb Clin Neurol. 2013;114:113-148. Available from: https://www.sciencedirect.com/science/article/abs/pii/B9780444534903000054
  8. Oliveira VC, Fernandes GW, Cardoso R, et al. Parasite load, viability, co-infections and histological alterations in the central nervous system of dogs naturally infected with Leishmania infantum. PLoS One. 2017;12(4):e0175588. Available from:https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0175588
  9. Villalba-Alemán E, Sosa-Estani S, Hecht M, et al. Infection by Trypanosoma cruzi in the central nervous system in nonhuman mammals: A systematic review. Parasitology. 2019;146(4):453-470. Available from: https://pubmed.ncbi.nlm.nih.gov/30873928/
  10. Da JR, Nogueira NP, Teixeira ARL. Trypanosoma cruzi infection and the rat central nervous system: histopathological studies. Exp Parasitol. 2000;95(2):104-120. Available from: https://www.sciencedirect.com/science/article/abs/pii/S0361923000003269
  11. Giorgio S, Gallo-Francisco PH, Roque GAS, Flóro E Silva M. Granulomas in parasitic diseases: the good and the bad. Parasitol Res. 2020;119(10):3165-3180. Available from: https://pubmed.ncbi.nlm.nih.gov/32789534/
  12. Cleveland Clinic. Granuloma: Locations, Types, Causes, Symptoms & Treatment. 2023. Available from: https://my.clevelandclinic.org/health/diseases/24597-granuloma
  13. Centers for Disease Control and Prevention (CDC). About Cysticercosis. 2024. Available from: https://www.cdc.gov/cysticercosis/about/index.html
  14. UT Southwestern Medical Center. Transverse myelitis: When inflammation damages the spinal cord ‘wiring’. 2023. Available from: https://utswmed.org/medblog/transverse-myelitis-treatment/
  15. Wang H, Fan L, Li C, Yu H, Han J, Du Y, Xing G. Infective endocarditis causing recurrent cerebral infarction, cerebral hemorrhage and septic meningitis: A case report. Medicine. 2024;103(48):e40749. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC11608702/
  16. Singh P, Paramjit E, Ahuja CK, Modi M, Vyas S, Goyal M, Kumar A, Bhatia V, Prabhakar A, Sharma SK. Complex neurocysticercosis lesions on imaging: Explained through correlative histomorphology. Neuroradiol J. 2022;36(1):59-67. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC9893162/
  17. Creutzfeldt-Jakob disease. Radiopaedia. Available from:https://radiopaedia.org/articles/creutzfeldt-jakob-disease

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