High incidence of acute myositis with type A influenza virus infection in the elderly.
We describe six elderly cases of acute myositis with type A influenza virus infection (Sydney) during the 1998-1999 outbreak. All six cases suffered from myalgia or muscle weakness especially in the lower extremities and the serum creatine kinase (CK) values were elevated above 1,000 IU/l without MB isoenzymes or electrocardiogram abnormalities. There have been a few case reports of acute myositis associated with influenza virus infection in the elderly. However, we noticed a high incidence of acute myositis among elderly patients with type A influenza virus infection. This complication may occur more commonly in elderly patients than has previously been thought.
Yoshino
M
M
Department of Infectious Diseases, Tokyo Metropolitan Geriatric Hospital.
Suzuki
S
S
Adachi
K
K
Fukayama
M
M
Inamatsu
T
T
D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D009980:Influenza A virus; D007251:Influenza, Human / Q000150:complications* / Q000453:epidemiology / Q000821:virology*; D008297:Male; D009220:Myositis / Q000209:etiology*; D014041:Tokyo / Q000453:epidemiology