Abstract

IntroductionA number of case and case series descriptions established an association between Legionella infection and hyperCKemia, but the frequency and severity of hyperCKemia in Legionella infection remain unknown. This study aims to investigate the incidence, extent, and consequences of hyperCKemia in a large group of patients with Legionella infection. MethodsThis retrospective study included patients with confirmed Legionella infection during a ten-year period who received creatine kinase (CK) testing. Comparisons were performed between groups of Legionella patients with and without hyperCKemia. ResultsA total of 267 patients were included. HyperCKemia was present in 144 (53.9%) patients. The mean peak CK value was 9598 IU/L (range: 226 to 462,000 IU/L) while peak CK exceeded 1000 IU/L in 82 (56.9%) patients and 5000 IU/L in 33 (22.9%). When compared to patients without hyperCKemia, patients with hyperCKemia had higher incidences of neurologic symptoms (p = 0.036), acute renal failure (p = 0.028), dialysis requirement (p = 0.009), and need for ICU care (p = 0.016). HyperCKemia resolved in most Legionella patients by 7 days from CK peaking. DiscussionLegionella infection requiring hospitalization appears to be associated with increased incidence of hyperCKemia and rhabdomyolysis. Greater awareness of the high incidence and the possible severity of hyperCKemia is needed when treating patients with Legionella infection.

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