Buffy coat smears from febrile patients may contain visible bacteria a
nd therefore detect bacteraemia before conventional blood cultures bec
ome positive. However, it is unusual to see microorganisms in an other
wise untreated peripheral blood smear. The case of a febrile neutropen
ic patient is reported. A Wright's stained peripheral blood smear cont
ained bacterial elements, thus making earlier diagnosis of septicaemia
and identification of the causative bacterium possible.