| Morphological and Molecular Characterization of Hematodinium perezi (Dinophyceae: Syndiniales), a Dinoflagellate Parasite of the Harbour Crab, Liocarcinus depurator. | Hematodinium perezi Chatton and Poisson (Dinophyceae: Syndiniales) is reported from one of its type hosts, Liocarcinus depurator, from Rye Bay in the English Channel, a site in a similar geographical location to that of the type description. The histology and ultrastructure of vegetative trophont stages, and rDNA sequences of the parasite infecting this host are reported for the first time. Ultrastructurally, H. perezi was confirmed by the presence of condensed chromatin profiles, trichocysts, a ... | 2011 | 22092696 |
| advances in our understanding of the global diversity and distribution of hematodinium spp. - significant pathogens of commercially exploited crustaceans. | hematodinium species are parasitic dinoflagellates known to infect a growing number of marine crustacean genera from around the world, many of which support important commercial fisheries. affected hosts undergo dramatic pathological alterations to their organs, tissues and hemolymph. there are no known control measures for this disease. economically important wild fished hosts known to be susceptible to hematodinium spp. include tanner crabs chionoecetes bairdi and snow crabs chionoecetes opili ... | 2012 | 22433998 |
| permanent genetic resources added to molecular ecology resources database 1 december 2011-31 january 2012. | this article documents the addition of 473 microsatellite marker loci and 71 pairs of single-nucleotide polymorphism (snp) sequencing primers to the molecular ecology resources database. loci were developed for the following species: barteria fistulosa, bombus morio, galaxias platei, hematodinium perezi, macrocentrus cingulum brischke (a.k.a. m. abdominalis fab., m. grandii goidanich or m. gifuensis ashmead), micropogonias furnieri, nerita melanotragus, nilaparvata lugens stål, sciaenops ocellat ... | 2012 | 22448966 |
| conservation in the first internal transcribed spacer (its1) region of hematodinium perezi (genotype iii) from callinectes sapidus . | hematodinium spp. infections have been reported from blue crabs callinectes sapidus in high-salinity waters of the usa from new jersey to texas. recently, h. perezi (genotype iii) has been proposed as the parasite species and genotype infecting blue crabs from virginia; however, it is unknown whether this same genotype is present in blue crabs from other locations. to address this question, we collected 317 blue crabs from massachusetts, virginia, georgia, florida, louisiana, and texas to test f ... | 2013 | 23482386 |
| disease, parasite, and commensal prevalences for blue crab callinectes sapidus at shedding facilities in louisiana, usa. | blue crab diseases, parasites, and commensals are not well studied in the gulf of mexico, and their prevalence rates have only been sporadically determined. commercial soft shell shedding facilities in louisiana experience high mortality rates of pre-molt crabs, and some of these deaths may be attributable to diseases or parasites. during the active shedding season in 2013, we determined the prevalence of shell disease, vibrio spp., lagenophrys callinectes, and hematodinium perezi at 4 commercia ... | 2015 | 25590771 |
| temperature correlates with annual changes in hematodinium perezi prevalence in blue crab callinectes sapidus in florida, usa. | blue crabs callinectes sapidus were monitored biannually throughout florida, usa, for 2 yr using a highly sensitive, quantitative polymerase chain reaction (qpcr) to determine the spatial and temporal changes in prevalence and intensity of hematodinium perezi infections during drought years. despite persistent drought conditions, h. perezi infections were not universally found. overall prevalence was 25.3% (95% ci: 22.8-28.1%) in 1066 crabs sampled from 6 locations (jacksonville, ormond beach, e ... | 2015 | 25850401 |
| prevalence and distribution of three protozoan symbionts in blue crab (callinectes sapidus) populations across louisiana, usa. | louisiana has one of the largest blue crab (callinectes sapidus) fisheries in the usa, but little is known about blue crab diseases, parasites, and symbionts in this area. in 2013-2014, large juvenile and adult blue crabs were collected at 4 diverse sites to determine the prevalence of the protozoan symbionts associated with black gill disease (lagenophrys callinectes), buckshot crabs (urosporidium crescens), and bitter crab disease (hematodinium perezi). a high aggregate prevalence of l. callin ... | 2015 | 25958802 |
| overwintering of the parasitic dinoflagellate hematodinium perezi in dredged blue crabs (callinectes sapidus) from wachapreague creek, virginia. | parasitic dinoflagellates in the genus hematodinium cause disease and mortality in several commercially important marine decapod crustaceans. one species, hematodinium perezi, occurs in blue crabs, callinectes sapidus, along the eastern seaboard and gulf coast of the usa. the parasite infects blue crabs, other decapods, and amphipods in the high salinity waters of coastal bays. epizootics of the parasite often reach prevalence levels of 75-80% during outbreaks with diseased crabs dying from the ... | 2015 | 26232044 |
| molecular detection of the parasitic dinoflagellate hematodinium perezi from blue crabs callinectes sapidus in louisiana, usa. | the dinoflagellate hematodinium perezi is a prolific pathogen of the blue crab callinectes sapidus along the atlantic and gulf of mexico coasts of north america. high prevalence, sometimes approaching 100%, and outbreaks with high mortality are associated with higher salinities. h. perezi has not been reported previously in blue crabs from louisiana, usa, where salinities in coastal habitats are generally below the parasite's favorable range. however, the possibility that h. perezi infects blue ... | 2016 | 27304873 |
| variation in spatial and temporal incidence of the crustacean pathogen hematodinium perezi in environmental samples from atlantic coastal bays. | hematodinium perezi, a parasitic dinoflagellate, infects and kills blue crabs, callinectes sapidus, along the atlantic and gulf coasts of the united states. the parasite proliferates within host hemolymph and tissues, and also produces free-swimming biflagellated dinospores that emerge from infected crabs. infections in c. sapidus recur annually, and it is not known if biotic or environmental reservoirs contribute to reinfection and outbreaks. to address this data gap, a quantitative pcr assay b ... | 2013 | 23641869 |
| genetic variations of the parasitic dinoflagellate hematodinium infecting cultured marine crustaceans in china. | the parasitic dinoflagellate hematodinium infects multiple cultured marine crustaceans and has resulted in significant economic losses to their aquaculture in china. limited molecular data implied a close relationship among hematodinium reported in china, whereas the genetic diversity and detailed genetic variation within hematodinium remains unclear. in order to investigate the genetic diversity and composition of the parasitic dinoflagellate in china, the sequences of the internal transcribed ... | 2016 | 27816017 |
| fiddler crabs (uca spp.) as model hosts for laboratory infections of hematodinium perezi. | the parasitic dinoflagellate, hematodinium perezi, negatively impacts the commercially important blue crab, callinectes sapidus. the parasite is a host generalist, but it has not been reported from littoral fiddler crabs living within a few meters of habitat known to harbor infected blue crabs. in the first study, populations of three species of fiddler crab were screened for natural infections. the infection status of field-collected and lab-inoculated crabs was determined by screening fresh he ... | 2017 | 27836683 |