Cysticercus fasciolaris in the Syrian Hamster

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Abstract
Repeated experimental attempts to infect the Syrian hamster, Mesocricetus auratus, with viable Taenia taeniaformis ova have failed. Ova pass through the digestive tract of this animal with the embryophore intact. Oncospheres with embryophores partly, as well as wholly digested away, were administered per os, injd. into the blood stream, directly into the liver and into the body cavity. None of these methods resulted in infection of the hamster with Cysticercus fasciolaris. One accidental, and, as yet unexplained, infection with a single Cysticercus fasciolaris strobilocercus was noted at autopsy of a hamster from a separate series infected with Trichinella spiralis. The Syrian hamster resists infection with this parasite. The single case found in this study may have been due to the accidental ingestion of an extremely viable oncosphere.

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