The fine structure of the tegument of Diphyllobothrium latum (L.) (original) (raw)
Summary
The fine structure of the tegument of the plerocercoid and the adult worm differs in several ways. A large increase in surface area, due to a rapid development of microvilli, takes place as the worm switches from a cold-blooded to a warm-blooded host. The plerocercoid has few and short microvilli, approximately 1.5 μ long, while the surface of the adult worm is densely packed with microvilli measuring more than 4 μ in length.
Structures described as lamellated bodies from the tegument of the procercoid (Bråten, 1968) and from the plerocercoid disappear when the worm enters the final host.
In the internal level of the tegument an increase in the number and size of mitochondria at the adult stage is a prominent feature.
Zusammenfassung
Die Feinstruktur des Tegumentes beim Plerocercoid unterscheidet sich in verschiedener Weise von dem des erwachsenen Bandwurms D. latum. Eine starke Vergrößerung der Oberfläche wird durch eine schnelle Entwicklung von Mikrovilli erreicht, wenn der Wurm vom kaltblütigen zum warmblütigen Wirt überwechselt. Das Plerocercoid hat wenige und kurze Mikrovilli (annähernd 1,5 μ lang), während die Oberfläche der erwachsenen Würmer dicht mit Mikrovilli besetzt ist (mehr als 4 μ Länge). Die als lamellierte Körper beschriebenen Strukturen vom Tegument des Procercoids (Bråten, 1968) und vom Plerocercoid schwinden, wenn der Wurm in den Endwirt gelangt. Eine Vermehrung der Mitochondrien an Zahl und Größe in der inneren Schicht des Tegumentes beim erwachsenen Stadium ist das vorherrschende Merkmal.
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References
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Authors and Affiliations
- Zoological Laboratory, University of Oslo, Oslo 3, Norway
Trond Bråten
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Bråten, T. The fine structure of the tegument of Diphyllobothrium latum (L.).Z. F. Parasitenkunde 30, 104–112 (1968). https://doi.org/10.1007/BF00329478
- Received: 10 August 1967
- Issue date: March 1968
- DOI: https://doi.org/10.1007/BF00329478