July 1972

The White Blood Cell Count in Fevers of Unknown Origin

Author Affiliations

San Rafael, Calif
From the Department of Pediatrics, Permanente Medical Group, San Rafael, Calif.

Am J Dis Child. 1972;124(1):60-63. doi:10.1001/archpedi.1972.02110130062009

A study of 200 fevers of unknown origin in nonhospitalized children showed that the value of the white blood cell and differential counts as predictors of cause is limited. In various viral infections, high neutrophil counts, even with numerous immature forms, were seen. An absolute neutrophil count below 5,000, however, was strong evidence against a bacterial cause.