PMC7074520_01
Blood film from an 11-year-old castrated male domestic shorthair cat. Moderate numbers of erythrocytes contain 1-3 microm signet ring-shaped piroplasms (arrows) consistent with Cytauxzoon felis. Wright-Giemsa stain x 100 objective
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Abnormalities on CBC included marked thrombocytopenia with few platelet clumps identified (10 x 103/mul; RI 166-466 x 103/mul), neutropenia (1.82 x 103/mul; RI 2.2.7-9.82 x 103/mul) and moderate numbers of intraerythrocytic signet ring-shaped inclusions compatible with C felis (Figure 1).
Liver, hematoxylin and eosin stain at x 400 magnification. Mononuclear cells in a hepatic blood vessel contains merozoites of Cytauxzoon felis
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Although modest in numbers, schizont structures typical of the protozoan C felis were recognized in hepatic arterioles and sinusoids, as well as in splenic sinusoids (Figures 2 and 3).
Spleen hematoxylin and eosin stain at x 400 magnification. Mononuclear cells in a blood vessel of the spleen contain merozoites of Cytauxzoon felis
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Although modest in numbers, schizont structures typical of the protozoan C felis were recognized in hepatic arterioles and sinusoids, as well as in splenic sinusoids (Figures 2 and 3).