Infectious, fungal or parasitic myopathy

Infectious, fungal, or parasitic myopathy refers to a group of acquired muscle diseases (myopathies) caused by direct invasion of skeletal muscle tissue by infectious organisms, including bacteria, fungi, parasites, or viruses. Unlike inherited myopathies, these conditions are not caused by genetic mutations but rather result from infection of muscle tissue. The skeletal muscles are the primary body system affected, though systemic involvement may occur depending on the causative organism. Clinically, patients may present with muscle pain (myalgia), muscle tenderness, muscle weakness, swelling of affected muscles, and sometimes fever or other signs of systemic infection. Specific presentations vary depending on the pathogen involved. Fungal myopathies may be caused by organisms such as Candida or Aspergillus species, particularly in immunocompromised individuals. Parasitic myopathies can result from infections with organisms such as Trichinella, Toxoplasma, Trypanosoma cruzi (Chagas disease), or Taenia solium (cysticercosis). Bacterial causes include pyomyositis, often caused by Staphylococcus aureus. Treatment is directed at the underlying infectious agent and may include antimicrobial, antifungal, or antiparasitic medications as appropriate. Supportive care, including pain management and physical therapy, may also be necessary. In cases of abscess formation (such as in pyomyositis), surgical drainage may be required. Prognosis depends on the causative organism, the extent of muscle involvement, and the patient's immune status. Immunocompromised patients, including those with HIV/AIDS or those receiving immunosuppressive therapy, are at higher risk for these conditions and may have more severe disease courses.

Age of Onset

Variable

Can begin at different ages, from infancy through adulthood

Source: openFDA + DailyMed · NDA / BLA labels with structured indications · refreshed weekly

Source: ClinicalTrials.gov · synced daily · phases, status, and PI names normalized at ingest

Source: NPI Registry + PubMed · trial PI roles cross-referenced with ClinicalTrials.gov · ranked by match score (publications + PI activity + community signal)

Source: NORD Rare Disease Centers + NIH Undiagnosed Diseases Network (UDN) · centers verified active within last 12 months

Source: PubMed + NIH RePORTER + openFDA + clinical-journal RSS · last 30 days · disease-tagged at ingest by AI extraction with human QC

Common questions about Infectious, fungal or parasitic myopathy