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Older Donated Blood Is Linked to Infection Risk

from the Los Angeles Times (Registration Required)

Hospitalized patients who received blood that had been stored for more than four weeks were nearly three times as likely to develop infections as those who received fresher blood, researchers said Tuesday.

The blood itself was not infected, but the stored blood's release of chemical agents called cytokines may have affected the recipients' immune systems, rendering them more susceptible to infections, said Dr. Raquel Nahra of Sparks Regional Medical Center in Fort Smith, Ark.

The patients typically suffered an increase in urinary-tract infections, pneumonia and infections associated with intravenous lines, but those who were infected were no more likely to die, Nahra told a Philadelphia meeting of the American College of Chest Physicians.

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