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First record of Chilodonella hexasticha (Ciliophora: Chilodonellidae) in Brazilian cultured fish: a morphological and pathological assessment.
- Source :
-
Veterinary parasitology [Vet Parasitol] 2013 Jan 16; Vol. 191 (1-2), pp. 154-60. Date of Electronic Publication: 2012 Aug 04. - Publication Year :
- 2013
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Abstract
- Chilodonelids are small ciliated protozoans found worldwide and can be dangerous in culture conditions. This study presents morphometric data on the ciliate Chilodonella that is found in cultured Nile tilapia (Oreochromis niloticus), native bait fish tuvira (Gymnotus aff. inaequilabiatus) and native pacu (Piaractus mesopotamicus) and includes a histopathological assessment of the changes that occur in the pacu. For parasitic diagnosis, skin and gill samples were scraped onto slides, dried at room temperature, stained with Giemsa or impregnated with silver nitrate, and the measurements were obtained from photomicrographs. In the diseased pacu, the first gill arch was collected and fixed in a 10% buffered formalin solution for histopathological analysis. Parasite specimens from the different collection sites were identified morphologically as C. hexasticha Kiernik (1909). Diseased fish exhibited depigmentation, skin ulceration, scale loss, excessive mucus production and gill lesions. Histopathological analysis of pacu gills displayed epithelial proliferation with mononuclear inflammatory infiltrate, hemorrhages, and scattering necrosis. In Brazilian-farmed fish this is the first record of C. hexasticha, which has great pathogenic potential in cultured freshwater species. In addition, two new hosts are presented.<br /> (Copyright © 2012 Elsevier B.V. All rights reserved.)
- Subjects :
- Animals
Brazil
Ciliophora classification
Ciliophora Infections diagnosis
Ciliophora Infections parasitology
Ciliophora Infections pathology
Fish Diseases diagnosis
Fish Diseases pathology
Fisheries
Species Specificity
Ciliophora cytology
Ciliophora physiology
Ciliophora Infections veterinary
Fish Diseases parasitology
Gymnotiformes parasitology
Tilapia parasitology
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2550
- Volume :
- 191
- Issue :
- 1-2
- Database :
- MEDLINE
- Journal :
- Veterinary parasitology
- Publication Type :
- Academic Journal
- Accession number :
- 22902259
- Full Text :
- https://doi.org/10.1016/j.vetpar.2012.07.030