Myxozoan parasites disseminated via oligochaete worms as live food for aquarium fishes: descriptions of aurantiactinomyxon and raabeia actinospore types

Dis Aquat Organ. 2006 Apr 6;69(2-3):213-25. doi: 10.3354/dao069213.

Abstract

A total of 7 samples of live freshwater oligochaetes (mixed species), sold as 'tubifex' worms as food for aquarium fishes, were purchased over a 1 yr period from several pet shops in Munich, Germany, and screened for parasitic infections of myxozoans. The water associated with 5 samples contained actinospores at the time of purchase; 6 samples subsequently released spores in the laboratory. In all, 12 types of actinospores (Myxozoa: Myxosporea) from 4 collective groups were released by the oligochaetes. In the current study we provide descriptions of 2 aurantiactinomyxons (Myxobolus intimus Zaika, 1965 and type 1 nov.) and 3 raabeias (type 1 and 2 nov., Raabeia type 1 of Oumouna et al., 2003); descriptions of the 5 triactinomyxon and 2 hexactinomyxon types have been published previously. We include both raabeia and echinactinomyxon types in differential diagnoses of our raabeia forms because a clear distinction between these groups no longer exists in the literature. Comparison of 18S rDNA sequence data revealed that 1 of the novel aurantiactinomyxons was Myxobolus intimus. The sale of worms hundreds of km away from their point of origin is a means of dissemination of myxozoan parasites.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animal Feed / parasitology*
  • Animals
  • Base Sequence
  • DNA, Protozoan / chemistry
  • Eukaryota / classification*
  • Eukaryota / genetics
  • Eukaryota / isolation & purification*
  • Fishes
  • Life Cycle Stages / genetics
  • Molecular Sequence Data
  • Oligochaeta / parasitology*
  • RNA, Ribosomal, 18S / genetics
  • Sequence Alignment
  • Spores, Protozoan / classification
  • Spores, Protozoan / isolation & purification

Substances

  • DNA, Protozoan
  • RNA, Ribosomal, 18S

Associated data

  • GENBANK/AY495708
  • GENBANK/AY495709