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Parasitology Research

, Volume 83, Issue 6, pp 539–548 | Cite as

Ceratomyxa sparusaurati (Protozoa: Myxosporea) infections in cultured gilthead sea bream Sparus aurata (Pisces: Teleostei) from Spain: aspects of the host-parasite relationship

  • Oswaldo Palenzuela
  • Ariadna Sitjà-Bobadilla
  • Pilar Álvarez-Pellitero
ORIGINAL PAPER

Abstract

Ceratomyxa sparusaurati infection was studied in gilthead sea bream from different mariculture systems of Spain. Culture conditions were found to influence the infection dynamics. Total prevalences ranged from 0 in a closed system to 59.9% in a Mediterranean semi-intensive farm. Prevalence was significantly lower in summer in a restricted group from the latter system, but no clear seasonal pattern was observed in the remaining fish groups in any system. A statistically significant dependence between infection prevalence and host weight was observed in some fish groups. Different degrees of histopathological damage were noted in the infected gallbladders, mainly involving swelling, vacuolization, and sloughing of the epithelial cells. Transmission electron microscope observations of the infected tissues demonstrated a characteristic protrusion of the epithelial cell surface and mitochondrial alterations. In fish from stocks showing external disease signs and trickling mortalities, parasite stages invaded other organs and were responsible for cell-mediated host reaction and important tissue injuries. Therefore, C. sparusaurati can be considered a potential threat for some Sparus aurata-growing systems.

Keywords

Transmission Electron Microscope Observation Fish Group Parasite Stage Epithelial Cell Surface Restricted Group 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Oswaldo Palenzuela
    • 1
  • Ariadna Sitjà-Bobadilla
    • 1
  • Pilar Álvarez-Pellitero
    • 1
  1. 1.Instituto de Acuicultura de Torre la Sal (CSIC), E-12595 Ribera de Cabanes, Castellón, Spain Tel.: +34 64 319500; Fax: +34 64 319509; e-mail: alvarezp@iats.csic.esES

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