10 Probabilistic Exposure Assessment to Phycotoxins by Recreational. . .
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shellfish were cooked in a can on open fire, during 2–5 min until their natural
opening. Mussels were analysed after cooking with and without their cooking juice
(for more details, see Picot et al. 2012). Then, a normal distribution describing the
impact of cooking was assigned to the contamination levels of raw bivalves.
Results and Discussion
Acute- and chronic-exposures to each of the phycotoxins under study were assessed
through a probabilistic approach, producing a probability density distribution of
dietary intakes from all the bivalves under study.
Exposure Assessment to Phycotoxins
Acute Exposure
Acute-exposure corresponds to the phycotoxin intake by an individual over a meal
composed of a single portion of bivalves. For each bivalve species, the exposure
is the quantity obtained by multiplying the portion size by the contamination data.
Table 10.3 presents the main results about acute exposure from the probabilistic
assessment.
Domoic Acid and Analogs
For DAs, the exposure distribution obtained by multiplying a portion size distribution by a contamination distribution for each of the five shellfish species under study
led to: (i) a mean up to 0.74 g/kg bw, (ii) a median value up to 0.29 g/kg bw
and (iii) a 95th percentile value up to 3.02 g/kg bw.
Okadaic Acid and Analogs
Concerning OAs, the exposure distribution led to a maximal (for harvested cockles)
mean value, a median value and a 95th percentile value equal to 0.70, 0.24 and
2.81 g/kg bw, respectively.
Spirolides
For the SPXs exposure distribution, the highest (for harvested cockles) mean
value, median and 95th percentiles were equal to 78.5, 49.6 and 250 ng/kg bw,
respectively.
117
shellfish were cooked in a can on open fire, during 2–5 min until their natural
opening. Mussels were analysed after cooking with and without their cooking juice
(for more details, see Picot et al. 2012). Then, a normal distribution describing the
impact of cooking was assigned to the contamination levels of raw bivalves.
Results and Discussion
Acute- and chronic-exposures to each of the phycotoxins under study were assessed
through a probabilistic approach, producing a probability density distribution of
dietary intakes from all the bivalves under study.
Exposure Assessment to Phycotoxins
Acute Exposure
Acute-exposure corresponds to the phycotoxin intake by an individual over a meal
composed of a single portion of bivalves. For each bivalve species, the exposure
is the quantity obtained by multiplying the portion size by the contamination data.
Table 10.3 presents the main results about acute exposure from the probabilistic
assessment.
Domoic Acid and Analogs
For DAs, the exposure distribution obtained by multiplying a portion size distribution by a contamination distribution for each of the five shellfish species under study
led to: (i) a mean up to 0.74 g/kg bw, (ii) a median value up to 0.29 g/kg bw
and (iii) a 95th percentile value up to 3.02 g/kg bw.
Okadaic Acid and Analogs
Concerning OAs, the exposure distribution led to a maximal (for harvested cockles)
mean value, a median value and a 95th percentile value equal to 0.70, 0.24 and
2.81 g/kg bw, respectively.
Spirolides
For the SPXs exposure distribution, the highest (for harvested cockles) mean
value, median and 95th percentiles were equal to 78.5, 49.6 and 250 ng/kg bw,
respectively.