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Parasitology

Corynosoma strumosum Eggs and Larvae: Microscopic Features

Microscopic characteristics of Corynosoma strumosum eggs and larvae in stool and fish tissues: morphological features of the parasite and human infection routes.

Vladimir Turitsyn Vladimir Turitsyn 1 min
Native stool smear, Corynosoma strumosum egg among detritus, x100
Native stool smear, Corynosoma strumosum egg among detritus, x100
Native stool smear, fusiform Corynosoma strumosum egg with membranes, x400
Native stool smear, fusiform Corynosoma strumosum egg with membranes, x400
Native stool smear, morphology of the multilayered membrane of a Corynosoma egg, x600
Native stool smear, morphology of the multilayered membrane of a Corynosoma egg, x600
Native smear, encapsulated Corynosoma strumosum acanthocephalan larva from fish, x40
Native smear, encapsulated Corynosoma strumosum acanthocephalan larva from fish, x40

Parasitology. A bit of exotica. Corynosoma strumosum eggs. X100, X400, X600. Ringed seal stool. Adult acanthocephalans (Corynosoma) live in the intestines of pinnipeds; however, literature describes cases of infection in fur-bearing animals, cats, dogs, and even humans. Infection occurs by consuming raw fish containing viable larvae. Such larvae (X40) are common in fish from Lake Ladoga and the Gulf of Finland.

🙏 Material kindly provided by Cand. Biol. Sci., Associate Professor, Parasitologist Vladimir Turitsin

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