Sparganum
As Sparganum to a mobile second designated larval stage of tapeworms the family of Diphyllobothriidae (for example, the fish tapeworm or Spirometra erinacei-Europaei ) in a transport host .
The first larval stage - the procercoid - develops in invertebrates , the second larval stage - the plerocerkoid - in a vertebrate. If such a plerocerkoid is ingested by a host other than the actual ultimate host , i.e. by transport hosts , it pierces the intestinal wall and migrates into the subcutaneous tissue, the muscles or internal organs. These stages, which are infectious for the ultimate host, are then referred to as sparganum, possible symptoms as sparganosis , for the fish tapeworm as diphyllobothriasis . In some cases it can undergo asexual reproduction ( proliferating sparganum) there.
literature
- DRR Burt: Platyhelminthes and Parasitism. An Introduction to Parasitology. The English University Press, London 1970, ISBN 0-340-11462-2 ( Unibooks. Modern Biology Series ).
- Yezid Gutierrez: Diagnostic Pathology of Parasitic Infections with Clinical Correlations. 2nd edition. Oxford University Press, New York et al. 2000, ISBN 0-19-512143-0 .