Host-parasite relationship during Epistylis sp (Ciliophora: Epistylididae) infestation in farmed cichlid and pimelodid fish

Made available in DSpace on 2018-11-26T17:04:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-05-01. Added 1 bitstream(s) on 2019-10-09T18:26:11Z : No. of bitstreams: 1 S0100-204X2016000500520.pdf: 620662 bytes, checksum: d21a0ad0459af05ceafc5c771e9bb313 (MD5) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The objective of this work was to describe the host-Epistylis sp. relationship during infestation on farmed fish. Five Nile tilapia (Oreochromis niloticus) and ten hybrid surubim catfish (Pseudoplatystoma reticulatum x P corruscans), all diseased, were used for in vivo morphological analysis of sessile peritrichs by contrast microscopy. Fragments of infected tissues were subjected to histological processing and scanning electron microscopy. Epistylis sp. caused hemorrhagic ulcer disease, and cichlids were more prone to develop infestations throughout the body surface due to the attachment of the colonies to the scales, which did not occur with pimelodids. Multifocal granulomatous dermatitis was observed, associated with the hydropic degeneration of the epithelium and to ulcerative areas of necrosis. Microscopic examination showed the presence of bacterial microflora associated to Epistylis sp. peduncles. Therefore, this species can be considered a portal of entry for opportunistic bacteria. Aquivet Saude Aquat, Rua Cristovao Colombo 1-519, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil Univ Fed Santa Catarina, Dept Aquicultura, Lab Sanidade Organismos Aquat, Rodovia Admar Gonzaga 1-346, BR-88040900 Florianopolis, SC, Brazil Univ Estadual Paulista Julio de Mesquita Filho Un, Ctr Aquicultura Unesp, Campus Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil Pontificia Univ Catolica Rio Grande do Sul, Fac Biociencias, Ave Ipiranga 6-681, BR-90619900 Porto Alegre, RS, Brazil UNESP, Fac Ciencias Agr & Vet, Dept Biol Aplicada, Lab Morfol Invertebrados, Campus Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil Embrapa Meio Ambiente, Rodovia SP-340,Km 127,5, BR-13820000 Jaguariuna, SP, Brazil UNESP, Fac Ciencias Agr & Vet, Dept Patol Vet, Campus Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil Univ Estadual Paulista Julio de Mesquita Filho Un, Ctr Aquicultura Unesp, Campus Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil UNESP, Fac Ciencias Agr & Vet, Dept Biol Aplicada, Lab Morfol Invertebrados, Campus Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil UNESP, Fac Ciencias Agr & Vet, Dept Patol Vet, Campus Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil CNPq: 305869/2014-0