The study was accomplished between June and September in 3 southern Galician Rias.
Total of 101 mussel samples were analyzed.
Vibrio parahaemolitycus bearing tdh, trh and tdh/trh were detected as well as ermB (erythromycin).
No positive samples were obtained for Vibrio vulnificus, Vibrio cholerae or tetQ (tetracycline).
Total and pathogenic V. parahaemolyticus were detected.