4-2. Skeletal muscle and subcutis, dog. (Hematoxylin and Eosin-200x)
The cestode larva is characterized by a 7-10 micron thick tegument with small fibrilated projections (microtriches), a spongy parenchymous body cavity without a pseudocoelom, a row of somatic cell nuclei immediately subjacent to the tegument, numerous calcareous corpuscles, and numerous tortuous branching invaginations of the tegument (excretory ducts). The cyst wall is composed of fibrous connective tissue admixed with moderate amounts of hemorrhage and fibrin, and low numbers of neutrophils, eosinophils, macrophages, and lymphocytes bounded by large amounts of granulation tissue.

Close Window