Occurrence of Perkinsus olseni (Protozoa: Apicomplexa) and other parasites in the venerid commercial clam Pitar rostrata from Uruguay, southwestern Atlantic coast.
Dis Aquat Organ
; 64(1): 85-90, 2005 Apr 06.
Article
em En
| MEDLINE
| ID: mdl-15900692
ABSTRACT
A study was conducted into the health status of natural populations of the venerid clam Pitar rostrata from Uruguay. Perkinsus sp. was detected in 22% of the clams. Severe hemocytic infiltration was detected in the tissues parasitized by this protozoan parasite. The sequencing of the ITS-5.8S gene cluster of the parasite confirmed that it belonged to the Perkinsus olseni species. Rickettsia or Chlamidia-like organisms were also found, with a prevalence of 11%, although without apparent host reaction; an unidentified species of Coccidia was found in the nephridia of 78% of the clams, with the intensity of infection ranging from moderate to high. A gregarine, Nematopsis-like organism was observed mainly in the epithelial cells of the intestine, without host response and with a prevalence of 56%. Of the metazoan parasites, trematodes were found in 11% of the individuals analyzed.
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Base de dados:
MEDLINE
Assunto principal:
Bivalves
/
Sistema Digestório
/
Eucariotos
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
País como assunto:
America do sul
/
Uruguay
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article