Keywords: leukocytosis, WBC, fever, elderly, geriatric, infection (PubMed Search)
The WBC count is not an accurate predictor of bacteremia in the elderly. 20-45% of elderly patients with proven bacteremia have a normal WBC on presentation.
[from Caterino JM, et al. Bacteremic elder emergency department patients: procalcitonin and white count. Acad Emerg Med 2004;11:393-396.]