Abstract
A false-positive latex agglutination test for cryptococcal antigen occurred in a patient with a cervical prevertebral abscess and vertebral osteomyelitis caused by Klebsiella pneumoniae. Using a commercial latex agglutination test kit, a cryptococcal antigen titer of 1:32 was found in the CSF, but no cryptococcal antigen was found when the CSF was retested at a reference laboratory. The false-positive test resulted in unnecessary therapy with amphotericin B and delay in appropriate diagnostic studies and therapy.
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