Abstract
A patient with Staphylococcus aureus bacteremia associated with an infected intravenous catheter was treated with oxacillin for two weeks. During that period all blood cultures were sterile, he rapidly became afebrile, and there were no signs of endocarditis or metastatic abscesses. However, serum antibodies against staphylococcal teichoic acid, initially undetectable by the agar gel immunodiffusion technic, became positive during the second week of treatment. Three weeks after discharge, the patient was readmitted to the hospital because of back pain and weakness in the lower extremities. Vertebral osteomyelitis and a spinal epidural abscess caused by Staph. aureus of the same phage type as the bacteremic isolate were demonstrated. This case illustrates the importance of careful follow-up of patients with Staph. aureus bacteremia and the potential value of serial measurement of teichoic acid antibodies in detecting clinically inapparent complications of infection.
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