Veterinary Pathology

Systemic Scuticociliatosis (Philasterides dicentrarchi) in sharks.

Systemic Scuticociliatosis (Philasterides dicentrarchi) in sharks.

Vet Pathol. 2014 May;51(3):628-32

Authors: Stidworthy MF, Garner MM, Bradway DS, Westfall BD, Joseph B, Repetto S, Guglielmi E, Schmidt-Posthaus H, Thornton SM

Abstract
Scuticociliatosis is an economically important, frequently fatal disease of marine fish in aquaculture, caused by histophagous ciliated protozoa in the subclass Scuticociliatida of the phylum Ciliophora. A rapidly lethal systemic scuticociliate infection is described that affected aquarium-captive zebra sharks (Stegostoma fasciatum), Port Jackson sharks (Heterodontus portusjacksoni), and a Japanese horn shark (Heterodontus japonicus). Animals died unexpectedly or after a brief period of lethargy or behavioral abnormality. Gross findings included necrohemorrhagic hepatitis and increased volumes of celomic fluid. Histologically, 1 or more of a triad of necrotizing hepatitis, necrotizing meningoencephalitis, and thrombosing branchitis were seen in all cases, with necrotizing vasculitis or intravascular fibrinocellular thrombi. Lesions contained variably abundant invading ciliated protozoa. Molecular identification by polymerase chain reaction from formalin-fixed tissues identified these as the scuticociliate Philasterides dicentrarchi (syn. Miamiensis avidus), a novel and potentially emergent pathogen in sharks.

Glossaire technique

Elevage commercial d'animaux marins ou d'eau douce et de plantes...
Contenant utilisé pour maintenir en vie des poissons, des plantes et plus...
Art d'attribuer le nom scientifique correct à un spécimen.
Manifestation pathologique due à l'action des microbes.
Se réfère à la mer, depuis la haute mer jusqu'au niveau de la marée haute...