This may give ragged red fibers . Type 1 fibers usually store lipids in small amounts. Mitochondrial oxidative metabolism requires transport of fatty acids into the mitochondrial matrix. Carrier deficiency limits transport and impairs respiration. Their deficiencies may lead to disease.
Infectious myositis is an inflammation of the voluntary muscles, marked by swelling and pain.
Affected areas usually include the shoulders and arms. Acute viral myositis is often caused by influenza or enterovirus. Retroviral agents in macrophages have been observed in muscle biopsies. Clinical Symptoms include symmetrical proximal muscle weakness with a faint erythematous scaly rash. DM occurs at all ages.