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2 August 2019 Encapsulation of the Acanthocephalan Corynosoma strumosum (Rudolphi, 1802) Lühe, 1904, in the Intermediate Host Spinulogammarus ochotensis
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Abstract

We describe the thin and ultra-thin structures of the envelopes surrounding the cystacanth of Corynosoma strumosum (Rudolphi, 1802) Lühe, 1904, in its intermediate host. A total of 4,357 amphipods from 2 species were examined: Locustogammarus locustoides (Brandt, 1851) and Spinulogammarus ochotensis (Brandt, 1851). Eleven corynosome cystacanths were found in 6 S. ochotensis specimens. Three were enclosed in acellular cysts originating from the parasite. Three other cystacanths were also encysted and were surrounded by a lighter capsule consisting of the host's hemocytes. Five cystacanths were enclosed in a cyst and a darker capsule, in which both the acanthocephalans and their surrounding envelopes were destroyed. We suggest that the cystacanth's cyst is a protective barrier against the host's cellular response, while the lighter and darker capsules represent different stages of parasite degeneration.

© American Society of Parasitologists 2019
E. M. Skorobrekhova and V. P. Nikishin "Encapsulation of the Acanthocephalan Corynosoma strumosum (Rudolphi, 1802) Lühe, 1904, in the Intermediate Host Spinulogammarus ochotensis," Journal of Parasitology 105(4), 567-570, (2 August 2019). https://doi.org/10.1645/19-22
Published: 2 August 2019
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