Parasites infecting the cultured oyster Crassostrea gasar (Adanson, 1757) in Northeast Brazil

The oyster Crassostrea gasar is a species widely used as food and a source of income for the local population of the estuaries of Northeast Brazil. Perkinsus marinus and Perkinsus olseni are deleterious parasites for oyster farming and were recently detected in Brazil. In this study, a histopatholog...

Full description

Saved in:
Bibliographic Details
Published in:Parasitology 2015-05, Vol.142 (6), p.756-766
Main Authors: QUEIROGA, FERNANDO RAMOS, VIANNA, ROGÉRIO TUBINO, VIEIRA, CAIRÉ BARRETO, FARIAS, NATANAEL DANTAS, DA SILVA, PATRICIA MIRELLA
Format: Article
Language:English
Subjects:
Animals
Brackish
Brazil
Cestoda
Crassostrea - parasitology
Crassostrea gasar
DNA - genetics
Freshwater
Host-Parasite Interactions
Marine
Metazoa
Nematopsis
Parasites - classification
Parasites - genetics
Parasites - physiology
Perkinsus marinus
Perkinsus olseni
Phylogeny
Polymerase Chain Reaction
Polymorphism, Restriction Fragment Length
Tylocephalum
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The oyster Crassostrea gasar is a species widely used as food and a source of income for the local population of the estuaries of Northeast Brazil. Perkinsus marinus and Perkinsus olseni are deleterious parasites for oyster farming and were recently detected in Brazil. In this study, a histopathologic survey of the oyster C. gasar cultured in the estuary of the River Mamanguape (Paraíba State) was performed. Adult oysters were collected in December 2011 and March, May, August and October 2012 and processed for histology and Perkinsus sp. identification by molecular analyses. Histopathological analysis revealed the presence of parasitic organisms including viral gametocytic hypertrophy, prokaryote-like colonies, protozoans (Perkinsus sp. and Nematopsis sp.) and metazoans (Tylocephalum sp. and cestodes). Other commensal organisms were also detected (the protozoan Ancistrocoma sp. and the turbellarian Urastoma sp.). The protozoan parasite Perkinsus sp. had the highest overall prevalence among the symbiotic organisms studied (48·9%), followed by Nematopsis sp. (36·3%). The other organisms were only sporadically observed. Only the protozoan Perkinsus sp. caused alterations in the oysters’ infected organs. Molecular analyses confirmed the presence of P. marinus, P. olseni and Perkinsus beihaiensis infecting the oyster C. gasar. This is the first report of P. beihaiensis in this oyster species.
ISSN:0031-1820
1469-8161
1469-8161
DOI:10.1017/S0031182014001863