Samples of diarrhoeic shellfish poison (DSP) mussels from several part
s of the Italian Adriatic coastline were extracted and tested accordin
g to a number of different methods presently available, i.e. Yasumoto'
s mouse biotest, Kat's biotest, the ELISA test and the HPLC method. Re
sults were compared for toxic levels detected in each sample. While a
common qualitative result (toxic/non-toxic) was given by all the metho
ds, no clear quantitative agreement was found. The differences between
methods and consequent lack of agreement in results are discussed.