Your browser doesn't support javascript.
loading
The effect of salinity on experimental infections of a Hematodinium sp. in blue crabs, Callinectes sapidus.
Coffey, Anna H; Li, Caiwen; Shields, Jeffrey D.
Afiliação
  • Coffey AH; Department of Environmental and Aquatic Animal Health, Virginia Institute of Marine Science, College of William and Mary School of Marine Science, Gloucester Point, Virginia 23062, USA.
J Parasitol ; 98(3): 536-42, 2012 Jun.
Article em En | MEDLINE | ID: mdl-22257093
The parasitic dinoflagellate Hematodinium sp. parasitizes blue crabs along the Atlantic seaboard of the United States. Infections in blue crabs have only been reported from waters where salinity is >11 practical salinity units (psu). Blue crabs maintain a hyperosmotic internal concentration at low salinities (0-5 psu), roughly comparable to 24 psu, and should be capable of maintaining an infection in low-salinity waters even if Hematodinium spp. cells are intolerant of low salinities. We tested this notion by observing the effect of low salinity on the progression of disease in crabs experimentally infected with the parasite. Blue crabs were acclimated to 5 psu or 30 psu salinity treatments. They were inoculated with Hematodinium sp. and necropsied 3, 7, 10, and 15 days post-inoculation. The low-salinity treatment did not have an effect on the proliferation of Hematodinium sp. infections in blue crabs; moreover, a greater proportion of infections in crabs in the low-salinity treatment developed dinospore stages than did those in the high-salinity treatment, indicating that salinity may affect the development of the parasite. However, dinospores from in vitro cultures rapidly became inactive when held in salinities <15 psu. Our experiments indicate that Hematodinium spp. can develop in blue crabs at low salinities, but that the parasite is incapable of transmission in this environment, which explains the lack of natural infections in crabs at low salinities.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Dinoflagellida / Braquiúros / Salinidade Limite: Animals Idioma: En Revista: J Parasitol Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Dinoflagellida / Braquiúros / Salinidade Limite: Animals Idioma: En Revista: J Parasitol Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Estados Unidos