RATIONALE: Antibiotics may decrease the side effects of neutropenia and fever caused by chemotherapy. Colony-stimulating factors such as G-CSF may increase the number of immune cells found in bone marrow or peripheral blood and may help a person's immune system recover from the side effects of chemotherapy. It is not yet known whether antibiotic therapy plus G-CSF is more effective than antibiotic therapy alone for treating side effects caused by chemotherapy.