Field emission scanning electron microscope to diagnose the Eperythrozoonsis. The mildly (Fig. 1--1) and severely (Fig. 1–2) infected RBCs. Erythrocyte in picture 1 (Fig. 1--1) had not been deformed but cells in (Fig. 1–2) and (Fig. 1–3) were badly misshapen with some holes on its surface. Transmission electron microscope showed the location of these organisms in erythrocyte depressions (Fig. 1–4) and fibril of these organisms connected with RBC was also observed when these organisms disassociated from erythrocyte (Fig. 1–5). Blood smear stained by Wright-Giemsa mixture demonstrated severe bacteremia (Fig. 1–6).