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Peptidergic and aminergic neurons in adultDiphyllobothrium dendriticum Nitzsch, 1824 (Cestoda, Pseudophyllidea)

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The peptidergic and aminergic neurons in adultDiphyllobothrium dendriticum were studied by light and electron microscopy, combined with fluorescence histochemistry (Falck-Hillarp method for biogenic amines). The peptidergic neurons, regarded as presumptive neurosecretory cells, are located close to the central as well as the peripheral nervous system. These neurons are characterized by their large electron-dense granules. They have very long processes extending to the musculature and the basement membrane of the tegument. The aminergic neurons show the fluorescence characteristic of 5-hydroxytryptamine and contain small dense-core granules. They are located in the brain commissure and along the main nerve cords. Fine nerves reach the muscular and subtegumental layers. Their distribution thus parallels that of the peptidergic neurons, indicating a possible interdependence between the two types of neurons.

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Gustafsson, M.K.S., Wikgren, M.C. Peptidergic and aminergic neurons in adultDiphyllobothrium dendriticum Nitzsch, 1824 (Cestoda, Pseudophyllidea). Z. Parasitenkd. 64, 121–134 (1981). https://doi.org/10.1007/BF00930489

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Key words

  • Diphyllobothrium dendriticum
  • Peptidergic neurons
  • Aminergic neurons