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Costia Necatrix

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Syn. Ichthyobodo necator, a 10–20 μm by 6–10 μm-sized protozoan with two flagella – one measures 9 μm, the other is 18 μm long. It attaches to the skin and gills of sweet water fish and introduces severe slimy covers often leading to death due to the lack of oxygen (Fig. 1).

Fig. 1
figure 1

Costia necatrix. Diagrammatic representation of a free-swimming stage (left) and a stage that is anchored in the skin of its host. Characteristic are the two flagella of different lengths


  • Costia Necatrix
  • Ichthyobodo Necator
  • Flagella
  • Gastroenterology
  • Dermatology

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Correspondence to Heinz Mehlhorn .

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© 2015 Springer-Verlag Berlin Heidelberg

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Mehlhorn, H. (2015). Costia Necatrix. In: Mehlhorn, H. (eds) Encyclopedia of Parasitology. Springer, Berlin, Heidelberg.

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Online ISBN: 978-3-642-27769-6

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