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[Myositis caused by Pleistophora in a patient with AIDS]

A Grau1, M E Valls, J E Williams

  • 1Servicio de Medicina Interna, Hospital de Figueres, Girona.

Medicina Clinica
|December 7, 1996
PubMed

Insights

This report details a rare Pleistophora infection, a parasitic protozoan causing severe myositis in two Human Immunodeficiency Virus (HIV)-positive patients. Diagnosis requires muscle biopsy, and effective treatments remain uncertain.

Area of Science:

  • Medical Parasitology
  • Infectious Diseases
  • Human Pathology

Background:

  • Pleistophora infections are rare, with only three cases reported in medical literature.
  • Two of the three reported cases, including the current one, involved patients co-infected with Human Immunodeficiency Virus (HIV).

Observation:

  • Patients presented with myositis, characterized by fever, myalgia (muscle pain), and progressive muscle weakness.
  • Clinical laboratory findings included anemia and elevated muscle enzyme levels, indicative of muscle damage.
  • Severe cases resulted in necrotic muscle fibrosis leading to disabling contractures.

Findings:

  • Diagnosis was confirmed by identifying the Pleistophora protozoan in muscle biopsy samples.
  • While light microscopy with special stains can detect spores, electron microscopy provides the most reliable diagnostic visualization.
  • No established treatment exists for Pleistophora myositis due to its rarity.

Implications:

  • This case highlights the potential for Pleistophora to cause severe myositis, particularly in immunocompromised individuals (e.g., HIV patients).
  • Further research is needed to explore potential therapeutic options, such as albendazole, which is effective against other microsporidia genera.
  • Accurate and timely diagnosis through muscle biopsy and advanced microscopy is crucial for managing this debilitating parasitic infection.

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