Schistosomiasis

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It is an infection caused by a parasite called schistosoma, common in developing countries, especially in sub-Saharan Africa.

It is acquired when its larvae penetrate through the skin, in areas with contaminated water. They pass into the blood to travel to the lungs where they reproduce. They pass back into the blood to finally nest in the liver, where they can live for up to 5 years. Other organs affected include the brain, urine bladder, rectum, intestines and spleen.

Symptoms will vary depending on the stage of the infection cycle. It usually starts with itching and rash at the skin entry site, followed by fever, chills and swollen glands, liver and spleen. It may also affect the intestines and urinary tract.

For diagnosis, it is very important to ask about possible contact with the larvae by bathing in stagnant water. A thorough physical examination for skin lesions should be performed.

There is a specific treatment for parasites called Praziquantel.

Bibliographic references
  1. Joannes Clerinx, Patrick Soentjens. Epidemiology, pathogenesis, and clinical manifestations of schistosomiasis. UpToDate Aug 24, 2016.
  2. Patrick Soentjens, Joannes Clerinx. Diagnosis of schistosomiasis. UpToDate Apr 23, 2015.
  3. Patrick Soentjens, Joannes Clerinx. Treatment and prevention of schistosomiasis. UpToDate Jul 28, 2016.
  4. Meltzer E, Schwartz E. Schistosomiasis: current epidemiology and management in travelers. Curr Infect Dis Rep 2013; 15:211.
  5. Jauréguiberry S, Paris L, Caumes E. Acute schistosomiasis, a diagnostic and therapeutic challenge. Clin Microbiol Infect 2010; 16:225.
  6. M Corachán. Infecciones por trematodos. Farreras Rozman. Medicina Interna. Volumen 2. 12º edición. Pp2397:2400.
  7. Charles H King, Adel A F Mahmoud. Esquistosomosis y otras enfermedades causadas por trematodos. Harrison. Principios de Medicina Interna. Volumen 2. 19º Edición. 1423:1428.
Author
Dr. Oscar Garcia-Esquirol
Copyright
© TeckelMedical 2026

Symptoms

    Welts / wheals on the skin


    Itching and pimples on the lower legs - Dermatitis


    Localized abdominal pain


    Widespread muscle pain


    Feel weak

Symptoms to watch out for

Inability to move the extremity
If mucus, blood or pus appears in the diarrhea.
Difficulty breathing

Self-care

Eat a balanced diet: increase consumption of fruits, vegetables, and white meats, and reduce consumption of fatty and fried foods.
Maintain a fluid intake of 6 - 8 cups per day.
Consult your doctor regarding the prescription of an oral antiparasitic and/or corticosteroids.
Consume drinking water.