Henneguya pagri n. sp.Myxozoa: Myxosporea) causing cardiac henneguyosis in red sea bream, Pagrus major (Temminck & Schlegel)

H. Yokoyama, N. Itoh, S. Tanaka

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Henneguya pagri n. sp.Myxozoa: Myxosporea) is described from netpen-cultured red sea bream, Pagrus major, in Japan. Affected fish displayed anaemic gills, an enlarged bulbus arteriosus and internal haemorrhaging in the pericardial cavity. Disease outbreaks occurred during the summer and the prevalence of infection reached 75% in August. Plasmodia of H. pagri developed in the bulbus arteriosus of red sea bream, in which degenerative cardiomyopathy was observed. Following maturation of the parasite, the influx of spores into the gills caused congestion of the gill capillaries, resulting in proliferative branchitis. Spores (10.5 × 7.5 μm) were ovoid with two caudal appendages (29.6 μm in average length), with a whip-like extension from the end. Partial small subunit ribosomal RNA gene sequences of H. pagri are closely related to those of H. lateolabracis infecting the bulbus arteriosus of Chinese sea bass, Lateolabrax sp.

Original languageEnglish
Pages (from-to)479-487
Number of pages9
JournalJournal of Fish Diseases
Volume28
Issue number8
DOIs
Publication statusPublished - 2005 Aug 1

Keywords

  • Description
  • Henneguya lateolabracis
  • Henneguya pagri
  • Myxosporean
  • Pagrus major
  • Pathology

ASJC Scopus subject areas

  • Aquatic Science
  • veterinary (miscalleneous)

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