[Infectious myopathies]

Infectious myopathies are rare acquired affections which have, generally, a good prognostic. Many types of viral infections can cause transient inflammatory myopathies. HIV myopathy may be present early in the HIV infection, but more often it is a complication of fully developed AIDS. Influenza virus myositis tend to be more severe in adults than in children. Group B coxsackie virus has been isolated from striated muscle of patients with epidemic myalgia. Parasitic infections of muscle include trichinosis, toxoplasmosis, and cysticercosis. Trichinosis is the most frequent parasitic myositis. The ocular, lingual or pharyngeal weakness and/or hypereosinophilia suggest the diagnosis. Pyomyositis, is a located zone of suppuration of muscle due to staphylococcus in 90% of the cases. It is a common occurrence in tropical climates, but has been recognized increasingly in temperate climates.