| first report of cryptosporidium spp. oocysts in oysters (crassostrea rhizophorae) and cockles (tivela mactroides) in brazil. | the consumption of oysters and cockles, which are usually eaten raw or lightly-cooked, can cause outbreaks of human diseases, especially if these shellfish are harvested from polluted areas. in brazil data about the occurrence of pathogens, like hepatitis a virus, in shellfish have been reported but research on natural contamination for pathogenic protozoa is still non-existent. cryptosporidium oocyst contamination of oysters (crassostrea rhizophorae) and cockles (tivela mactroides) was evaluate ... | 2008 | 18401118 |
| analysis of marine bivalve shellfish from the fish market in santos city, são paulo state, brazil, for toxoplasma gondii. | the aim of this study was to determine if toxoplasma gondii are present in oysters (crassostrea rhizophorae) and mussels (mytella guyanensis) under natural conditions using a bioassay in mice and molecular detection methods. we first compared two standard protocols for dna extraction, phenol-chloroform (pc) and guanidine-thiocyanate (gt), for both molluscs. a total of 300 oysters and 300 mussels were then acquired from the fish market in santos city, são paulo state, brazil, between march and au ... | 2010 | 20197214 |
| heavy metals in benthic organisms from todos os santos bay, brazil. | the marine ecosystems of todos os santos bay (tsb, the state of bahia, brazil) have been impacted by the presence on its coast of a large metropolitan area as well as of chemical and petrochemical activities. despite its ecological importance, there is a lack of scientific information concerning metal contamination in tsb marine biota. thus, we analyzed concentrations of metals in four species of marine benthic organisms (two seaweeds, padina gymnospora and sargassum sp. one seagrass, halodule w ... | 2008 | 18470382 |
| accumulation and elimination of trace metals in a transplantation experiment with crassostrea rhizophorae. | oysters, crassostrea rhizophorae, were reciprocally transplanted to two different sites: a contaminated site in the cotegipe channel at aratu bay and an uncontaminated site at cacha-prego, inside and outside of todos os santos bay (brazil), respectively. trace metal accumulation was measured after 0, 15, 30, and 60 days of exposure at the contaminated site. oysters transplanted for 60 days from the clean to the contaminated site had accumulated cadmium and lead to similar concentrations as found ... | 2000 | 10556369 |