Philasterides dicentrarchi (Ciliophora, Scuticociliatida) as the causative agent of scuticociliatosis in farmed turbot Scophthalmus maximus in Galicia (NW Spain)

Diseases of Aquatic Organisms

J. Fernández¹  A. Paramá¹  M. F. Alvarez¹  R. Iglesias¹  M. L. Sanmartín¹  J. Leiro¹ 

关键词: Philasterides dicentrarchi;    Scuticociliatosis;    Histophagous ciliates;    Farmed turbot;    Scophthalmus maximus;   

DOI  :  10.3354/dao046047

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: Two outbreaks of scuticociliatosis affecting farmed turbot Scophthalmus maximus in Galicia are described. Moribund fish showed cutaneous ulcers, darkened skin, swimming behaviour alterations, exophthalmos, and/or abdominal distension as aresult of accumulation of ascitic fluid in the body cavity. Ciliates were detected in fresh mounts of practically all organs and tissues, including the blood and ascitic fluid. Histopathological studies revealed severe encephalitis and meningitis(associated with different degrees of softening or liquefaction of the brain), necrosis of the hepatic parenchyme, severe oedema of the intestinal wall, degeneration of muscle fibres, hyperplasia of the branchial epithelium, and/or vascular andperivascular inflammation. In some cases, parasites are surrounded by abundant monocytic and lymphocytic infiltrate. We report the morphological and biometric characteristics of this ciliate, which allow identification as Philasteridesdicentrarchi. We discuss possible routes of entry into the host, and environmental factors possibly facilitating infection.

【 授权许可】

Unknown