Abstract
Scuticociliatosis, which is caused by an opportunistic ciliate protozoan, is responsible for significant economic losses in marine ornamental fish. This study reports the occurrence of Uronema sp., which was found to be parasitizing three species of marine reef fish imported into Brazil and maintained in quarantine: Vanderbilt's Chromis (Chromis vanderbilti), blue-green damselfish (Chromis viridis), and sea goldie (Pseudanthias squamipinnis). During the quarantine period, some fish presented with behavioral disorders and hemorrhages and ulcerative lesions on the body surface. Histopathological analysis showed hemorrhages, inflammation comprising mononuclear and granular cells in the skeletal muscle, and necrosis of the skin and the secondary lamellae of the gills, and parasites were also observed in the renal capsule. The absence of transboundary measures available to prevent the occurrence of ornamental fish diseases is also discussed.
Highlights
IntroductionScuticociliatosis, a severe disease that compromises the health of marine ornamental fish, is caused by marine ciliates belonging to the subclass Scuticociliatia
This study reports the occurrence of Uronema sp., which was found to be parasitizing three species of marine reef fish imported into Brazil and maintained in quarantine: Vanderbilt’s Chromis (Chromis vanderbilti), blue-green damselfish (Chromis viridis), and sea goldie (Pseudanthias squamipinnis)
Scuticociliatosis, a severe disease that compromises the health of marine ornamental fish, is caused by marine ciliates belonging to the subclass Scuticociliatia
Summary
Scuticociliatosis, a severe disease that compromises the health of marine ornamental fish, is caused by marine ciliates belonging to the subclass Scuticociliatia. Uronema marinum Dujardin, 1841 was first reported in nine fish species from the Atlantic and Pacific Oceans maintained in the New York Aquarium (CHEUNG et al, 1980). The fish species most affected are the olive flounder Paralichthys olivaceus (IGLESIAS et al, 2001; JIN et al, 2009; MOUSTAFA et al, 2010a), turbot Scophthalmus maximus (IGLESIAS et al, 2001; WHANG et al, 2013), sea bass Dicentrarchus labrax (WHANG et al, 2013), Southern bluefin tuna Thunnus maccoyii (MUNDAY et al, 1997; GARZA et al, 2017), grouper Polyprion oxygeneios, yellowtail kingfish Seriola lalandi
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