Host reaction in paratenic fish hosts against 3rd stage larvae of Anguillicola crassus

Cs Székely, J. Pazooki, K. Molnár

Research output: Contribution to journalArticle

12 Citations (Scopus)


Many fish species of Lake Balaton (Hungary) serve as paratenic hosts for the 3rd stage larvae of the eel parasite Anguillicola crassus The incidence of different phases of the host reaction varies with paratenic fish host but its nature is basically the same. The appearance of mononuclear cells around the larvae migrating in the tissues or in the abdominal cavity is regarded as a sign of cellular host reaction. The cells adhering to the surface of the larvae gradually assume an epithelioid shape and form a granuloma. With the advancement of the process the larvae and the epithelioid cells surrounding them undergo necrosis, and the granuloma becomes surrounded by a connective tissue capsule. In more chronic cases, the inside of the parasitic nodule surrounded by several layers of connective tissue is filled out by amorphous tissue and parasite debris. In the 'suitable paratenic hosts' Anguillicola sp. larvae not affected by the host's cellular reaction outnumber those affected by it, whereas in the 'less suitable paratenic hosts' the cellular reaction very rapidly forces the larvae into foci and destroys them.

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalDisease of Aquatic Organisms
Issue number3
Publication statusPublished - Sep 12 1996


  • Anguillicola
  • Eel parasite
  • Host reaction
  • Lake Balaton
  • Paratenic hosts

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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