| Dinoflagellates of genus Ostreopsis are known in tropical areas to provoke food intoxication, after palytoxin accumulation in seafood. Probably in link with climatic changes, Ostreopsis sp. is increasingly present in French Mediterranean since 2006. In the context of the PhD, the studies in natural environment, in summer 2011 and 2012, showed that: i) Ostreopsis cf. ovata strain presented a complex toxinic profile, including palytoxin and especially ovatoxins (OVTX-a, -b, c, -d, -e). A new analog (OVTX-h) was detected; ii) cell and toxinic concentrations decreased with depth; iii) different seafood accumulated toxins, which could represent real risk for bathers and consumers. Because there are no standards for OVTXs, one of the PhD goals was to develop a... |
