Paediatric Infectious Disease

A webpage for paediatric infectious disease service in Malaysia

Thursday, February 27, 2020

Acute Infective Myositis


Acute Viral or Infective Myositis

Common problem: My son had fever for few days and now he refused to walk because of calf pain bilateral?




Acute infective myositis is an illness characterized by muscle weakness and pain associated with elevated muscle enzyme levels and evidence of infection usually by symptoms of fever, lethargy, poor oral intake. It can be due to multiple type of virus infection but in our setup the commonest virus being Influenza virus infection and Dengue Virus Infection. Apart from viruses, bacteria (including mycobacteria), fungi, and parasites can also cause myositis.

Blood investigation usually showed elevated muscle enzyme CK (Creatinine Kinase), mostly consisting of the MM (muscle) isoenzyme, as high as 10-100x times normal.
Complications include rhabdomyolysis causing renal impairement.

Hence, treatment includes IV hydration, antibiotics and antiviral when indicated.

Please contact your doctor if you need any help.

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