Abstract
Morphology of capsules surrounding acanthocephalan Corynosoma strumosum in paratenic hosts (sea fishes of three species from the northern part of the Sea of Okhotsk) was studied. A thick layer of glycocalyx is formed on the surface of acanthocephalan's tegument in smelts Osmerus mordax dentex and Hypomesus olidus; the surrounding capsule is formed by fibroblasts and collagen fibers and do not include inflammatory cells. Besides fibroblasts, capsule of the sole Limanda aspera consists also of macrophages, granulocytes, "dark" cells, and once of erythrocytes that indicate obvious inflammatory response of the host's organism to invasion; glycocalyx on the surface of acanthocephalans from the sole is weakly developed. The obtained results allow considering the smelts as the most suitable paratenic hosts and the yellow-finned sole as unsuitable paratenic host for the studied acanthocephalans.
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