Reference work entry
This species which has its schizonts and tissue cysts in pigeons, and its gamo- and sporogony in raptor birds, is very pathogenic for pigeons, since extremely large numbers of tissue cysts inside muscles are produced. Pathologic effects are so severe that very high death rates occur after an infection (Fig. 1). The primary cyst wall inside the muscle fibers is smooth and is not provided with protrusions (Fig. 2a, b). The metrocytes and cystozoites (cyst merozoites) are enclosed in chamber-like hollows, which are separated from each other by thin septae consisting of amorphic material (Fig. 2b, c).
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