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Published on: December 27, 2010
Sarcocystis myopathy in a patient with HIV-AIDS
Dustin Anderson1, Nabeela Nathoo1, Jian-Qiang Lu2
1Department of Medicine (Neurology), HMRC 611, University of Alberta, Edmonton, AB, T6G 2G3, Canada.
Abstract:
Sarcocystosis is a zoonotic infection that causes intestinal and muscular illnesses in humans. Sarcocystosis was until recently considered rare in humans. To complete their life cycle, Sarcocystis species require both a definitive and an intermediate host. Humans are the definitive host when infected by one of two species: Sarcocystis hominis (from eating undercooked beef) or Sarcocystis suihominis (from eating uncooked pork). Infection with either of these species results in intestinal sarcocystosis, causing a self-limited disease characterized by nausea, abdominal pain, and diarrhea. Humans act as the intermediate host when infected by Sarcocystis nesbitti, resulting in the markedly different clinical picture of muscular sarcocystosis. Most documented cases of muscular sarcocystosis were assumed to be acquired in Malaysia, in addition to other regions of Southeast Asia and India. Published cases of muscular sarcocystosis from the Middle East, Central and South America, and Africa are all rare. Although the clinical presentation of muscular sarcocystosis remains to be fully characterized, fever, myalgia, and headache are among the most common symptoms. Here, we report a patient from sub-Saharan Africa with chronic Sarcocystis myopathy and well-controlled HIV-AIDS.
Insights
Sarcocystosis, a zoonotic parasite, can cause intestinal or muscular illness. This report details a rare case of chronic Sarcocystis myopathy in a sub-Saharan African patient with HIV-AIDS.
Area of Science:
- Parasitology
- Infectious Diseases
- Human Health
Background:
- Sarcocystosis is a zoonotic parasitic infection with both intestinal and muscular manifestations in humans.
- Previously considered rare, human Sarcocystis infections involve complex life cycles with definitive and intermediate hosts.
- Humans can be definitive hosts (Sarcocystis hominis, Sarcocystis suihominis) causing intestinal illness, or intermediate hosts (Sarcocystis nesbitti) causing muscular illness.
Observation:
- Muscular sarcocystosis, often associated with Southeast Asia, presents with symptoms like fever, myalgia, and headache.
- Documented cases of muscular sarcocystosis outside endemic regions are infrequent.
- This study reports a unique case of chronic Sarcocystis myopathy in a patient from sub-Saharan Africa.
Findings:
- The patient presented with chronic Sarcocystis myopathy.
- The patient had well-controlled Human Immunodeficiency Virus-Acquired Immunodeficiency Syndrome (HIV-AIDS).
- This case expands the known geographical distribution of Sarcocystis myopathy.
Implications:
- Highlights the need for broader recognition of Sarcocystis myopathy in diverse geographical settings.
- Suggests Sarcocystis infection should be considered in patients with myopathy, particularly in endemic or potentially underreported regions.
- Emphasizes the importance of considering co-infections and host factors like HIV-AIDS in parasitic myopathies.
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