Figure 1.

WBC commonly found in guinea pig blood smears. (A) Lymphocytes have a higher nuclear:cytoplasmic ratio than (D) monocytes. Eosinophils (C) are easily differentiated from (B) neutrophils, which also are known as heterophils in rabbits and guinea pigs, by the larger, more prominent pink granules in eosinophils. (E) Basophils contain large blue-purple granules. (F) Foa-Kurloff cells (F) contain pink intracytoplasmic inclusion bodies of varying size and have shown natural killer activity in vitro. Wright-Giemsa staining; magnification, ×100 (oil immersion).