1505's peripheral blood collected pretest (July 9, 2001) and stained with
Wright stain (Hema-Tek 2000, Bayer Corporation,
Wright Stain Pak, Curtin Matheson Scientific Inc., Houston, TX, USA), erythrocytic morphologic changes (moderate to marked stomatocytosis, punctate discoloration, or polychromatophilic aggregation) suggestive of a hemotropic parasite were observed (Figure 1).