Scuticociliatosis caused by Uronema sp. in ten different ornamental aquarium reef fish in Brazil

Author:

Cardoso Pedro Henrique Magalhães1ORCID,Moreno Luisa Zanolli2,Moreno Andrea Micke1,Balian Simone de Carvalho1,Oliveira Carolina Helena de1,Soares Herbert Sousa1,Martins Maurício Laterça3,Rodrigues Marianna Vaz4

Affiliation:

1. Universidade de São Paulo, Brasil

2. Universidade de São Paulo, Brasil; Centro Universitário Max Planck, Brasil

3. Universidade Federal de Santa Catarina, Brasil

4. Universidade Estadual Júlio de Mesquita Filho, Brasil

Abstract

Abstract Scuticociliatosis, caused by an opportunistic ciliate protozoan, is responsible for significant economic losses in marine ornamental fish. This study reports the occurrence of Uronema spp., parasitizing ten species of marine reef fish at an ornamental fish wholesaler: Blue green damselfish (Chromis viridis), Vanderbilt’s Chromis (Chromis vanderbilti), Pennant coralfish (Heniochus acuminatus), Threespot angelfish (Apolemichthys trimaculatus), Goldspotted angelfish (Apolemichthys xanthopunctatus), Sea goldie (Pseudanthias squamipinnis), Orchid dottyback (Pseudochromis fridmani), Threadfin butterflyfish (Chaetodon auriga), Vagabond butterflyfish (Chaetodon vagabundus), and Bluecheek butterflyfish (Chaetodon semilarvatus). Diseased fish showed disorders such as hemorrhages and ulcerative lesions on the body surface. Histopathological analysis of the muscle, liver, gut, kidney, spleen, gills, and stomach revealed hemorrhages and degeneration of muscle fiber, vacuolar degeneration of hepatocyte, inflammatory process and granuloma in the liver, atrophy of intestinal villi, inflammatory process and granuloma in the kidney, melanomacrophage centers, as well as inflammatory process in the spleen, epithelial cells hyperplasia and granuloma formation in the gills, and vacuolar degeneration and eosinophils in the stomach. Due to the severity of the disease, it is necessary to implement biosecurity measures with rapid and accurate diagnosis to minimize the risk of economic losses caused by Uronema spp.

Publisher

FapUNIFESP (SciELO)

Subject

General Veterinary,Parasitology

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