Infectious Diseases II
A 6-yr-old boy with acute lymphocytic leukemia has had a central venous catheter (Hickman catheter) in place for 1 yr to facilitate administration of chemotherapy. He was brought into the clinic with a temperature of 39°C. His mother reports that he was well until an hour after she routinely flushed his line with heparin, when he developed the fever and had rigors. Aside from increased heart rate, his vital signs and findings on physical examination are normal. He is not neutropenic. The most appropriate approach to management of this child is:
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