Experimental studies on the infectivity of Anguillicola crassus third- stage larvae (Nematoda) from paratenic hosts

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18 Citations (Scopus)

Abstract

The swimbladder parasite Anguillicola crassus Kuwahara, Niimi et Itagaki, 1974 (Nematoda: Dracunculoidea) is a well-known pathogenic parasite of the Japanese and European eels. Numerous studies on the life cycle of the parasite have revealed the involvement of a copepod or an ostracod intermediate host and a fish paratenic host, in which the third-stage larvae (L3) infective to the eel develop. The present study comprised infection experiments with the larvae of A. crassus. These experiments can be divided into three groups: (1) experimental reproduction of the parasite's life cycle via copepod intermediate hosts and fish paratenic hosts, (2) infection of another potential paratenic host with third-stage larvae of A. crassus collected from a paratenic host; (3) study of the ability of larvae damaged by paratenic hosts to infect the final host, the eel. Infection experiments have revealed that larvae which are still viable but have become encapsulated as a result of the host reaction mounted against them by cyprinid paratenic hosts (bleak, Alburnus albumus) have lost their ability to infect the final host, the eel. At the same time, experimental infection of the eel with larvae derived from other paratenic fish hosts (river goby, Neogobius fluviatilis; ruffe, Gymnocephalus cernua) showing no or only weak host reaction proved to be successful.

Original languageEnglish
Pages (from-to)305-311
Number of pages7
JournalFolia Parasitologica
Volume43
Issue number4
Publication statusPublished - 1996

Fingerprint

Anguillicoloides crassus
paratenic hosts
Nematoda
Eels
Larva
pathogenicity
eel
larvae
Parasites
Copepoda
parasites
Fishes
intermediate hosts
Infection
Life Cycle Stages
infection
Dracunculoidea
life cycle (organisms)
Alburnus
fish

Keywords

  • Anguillicola crassus
  • European eel
  • experimental infection
  • host reaction
  • intermediate hosts
  • larval stages
  • paratenic hosts

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Parasitology

Cite this

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abstract = "The swimbladder parasite Anguillicola crassus Kuwahara, Niimi et Itagaki, 1974 (Nematoda: Dracunculoidea) is a well-known pathogenic parasite of the Japanese and European eels. Numerous studies on the life cycle of the parasite have revealed the involvement of a copepod or an ostracod intermediate host and a fish paratenic host, in which the third-stage larvae (L3) infective to the eel develop. The present study comprised infection experiments with the larvae of A. crassus. These experiments can be divided into three groups: (1) experimental reproduction of the parasite's life cycle via copepod intermediate hosts and fish paratenic hosts, (2) infection of another potential paratenic host with third-stage larvae of A. crassus collected from a paratenic host; (3) study of the ability of larvae damaged by paratenic hosts to infect the final host, the eel. Infection experiments have revealed that larvae which are still viable but have become encapsulated as a result of the host reaction mounted against them by cyprinid paratenic hosts (bleak, Alburnus albumus) have lost their ability to infect the final host, the eel. At the same time, experimental infection of the eel with larvae derived from other paratenic fish hosts (river goby, Neogobius fluviatilis; ruffe, Gymnocephalus cernua) showing no or only weak host reaction proved to be successful.",
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