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Detection of Dinophysis species and associated okadaic acid in farmed shellfish: a two-year study from the western Mediterranean area

Anna Maria Bazzoni
Anna Maria Bazzoni
, 
Alessandro G. Mudadu
Alessandro G. Mudadu
, 
Giuseppa Lorenzoni
Giuseppa Lorenzoni
, 
Barbara Soro
Barbara Soro
, 
Nadia Bardino
Nadia Bardino
, 
Igor Arras
Igor Arras
, 
Giovanna Sanna
Giovanna Sanna
, 
Bruna Vodret
Bruna Vodret
, 
Riccardo Bazzardi
Riccardo Bazzardi
, 
Edoardo Marongiu
Edoardo Marongiu
 und 
Sebastiano Virgilio
Sebastiano Virgilio
   | 07. Juli 2018
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Online veröffentlicht: 07. Juli 2018
Seitenbereich: 137 - 144
Eingereicht: 16. Feb. 2018
Akzeptiert: 14. Juni 2018
DOI: https://doi.org/10.2478/jvetres-2018-0022
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© 2018 Anna Maria Bazzoni et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Geographic locations of Sardinia and shellfish farm sampling sites (black circles)
Geographic locations of Sardinia and shellfish farm sampling sites (black circles)

Fig. 2

Monthly numbers of cases (within the bigger squares) with okadaic acid toxin group in shellfish farms (identified with own site codes) during 2015 (left) and 2016 (right). Classes of okadaic acid toxin group quantification (smaller squares above the line) and Dinophysis spp. abundance (smaller squares below the line) are shown. Plus sign indicates values exceeding the legal limit for okadaic acid toxin group concentration. Letter A indicates the absence of Dinophysis spp.
Monthly numbers of cases (within the bigger squares) with okadaic acid toxin group in shellfish farms (identified with own site codes) during 2015 (left) and 2016 (right). Classes of okadaic acid toxin group quantification (smaller squares above the line) and Dinophysis spp. abundance (smaller squares below the line) are shown. Plus sign indicates values exceeding the legal limit for okadaic acid toxin group concentration. Letter A indicates the absence of Dinophysis spp.

Fig. 3

Examples of the relationship between Dinophysis spp. cell abundance (green line) in seawater and the presence of okadaic acid toxin group (blue bar) in shellfish during 2015 (left side of figure) and 2016 (right side). The X-axis lists the dates of seawater and shellfish sampling; the left-hand Y-axis shows the values of Dinophysis species abundance (cell/L) and the right-hand Y-axis shows the okadaic acid toxin group concentration (μg OA eq/kg e.p.). a – increase in okadaic acid toxin group concentration concomitant with a decrease in Dinophysis spp. cell abundance in Orosei (ORO); b – presence of okadaic acid toxin group concomitant with Dinophysis spp. absence in Feraxi (FER)
Examples of the relationship between Dinophysis spp. cell abundance (green line) in seawater and the presence of okadaic acid toxin group (blue bar) in shellfish during 2015 (left side of figure) and 2016 (right side). The X-axis lists the dates of seawater and shellfish sampling; the left-hand Y-axis shows the values of Dinophysis species abundance (cell/L) and the right-hand Y-axis shows the okadaic acid toxin group concentration (μg OA eq/kg e.p.). a – increase in okadaic acid toxin group concentration concomitant with a decrease in Dinophysis spp. cell abundance in Orosei (ORO); b – presence of okadaic acid toxin group concomitant with Dinophysis spp. absence in Feraxi (FER)

Abundance of Dinophysis acuminata and D. sacculus and quantification of okadaic acid toxin group among positive cases of diarrhoetic shellfish poisoning toxicity in 2015 and 2016

Sampling dateSite Code-stationAbundance(cell/L)Okadaic acid toxin groupShellfish products
D. acuminataD. sacculus(mg AO eq/Kg e.p.)
23/05/2016CIR-100675.8Mytilus galloprovincialis
19/02/2015COL-100341.3Mytilus galloprovincialis
09/03/2015COL-100470.4Mytilus galloprovincialis
03/02/2015FER-1001,269Mytilus galloprovincialis
10/02/2015FER-100263.1Mytilus galloprovincialis
19/02/2015FER-100516.2Mytilus galloprovincialis
23/02/2015FER-100738.9Mytilus galloprovincialis
26/02/2015FER-100317Mytilus galloprovincialis
09/03/2015FER-100424.5Mytilus galloprovincialis
19/03/2015FER-100383.1Mytilus galloprovincialis
23/03/2015FER-100257.2Mytilus galloprovincialis
07/01/2016FER-11,040120355.8Mytilus galloprovincialis
12/01/2016FER-11,720401,111Mytilus galloprovincialis
19/01/2016FER-100790Mytilus galloprovincialis
02/02/2016FER-1400547Mytilus galloprovincialis
09/02/2016FER-1400778Mytilus galloprovincialis
16/02/2016FER-100315Mytilus galloprovincialis
19/02/2016FER-1n.sn.s273Mytilus galloprovincialis
23/02/2016FER-1400385Mytilus galloprovincialis
03/03/2016FER-100317Mytilus galloprovincialis
12/01/2016FER-200660Tapes decussatus
27/04/2015ORO- 11,5600184Mytilus galloprovincialis
27/04/2015ORO-41,6800205Mytilus galloprovincialis
15/06/2016ORO-440,2009,400607Mytilus galloprovincialis
29/06/2016ORO-618,7002,2001,066Mytilus galloprovincialis
04/07/2016ORO-62,200400371Mytilus galloprovincialis
18/07/2016ORO-6n.sn.s299Mytilus galloprovincialis
25/07/2016ORO-6n.sn.s188Mytilus galloprovincialis
03/02/2015SGL-2001480Mytilus galloprovincialis
19/02/2015SGL-200704.8Mytilus galloprovincialis
19/02/2015SGL-300498.8Mytilus galloprovincialis
23/02/2015SGN-400618.9Mytilus galloprovincialis
12/01/2016STD-41200168Crassostrea gigas
11/02/2015TOR-21,8000192.5Mytilus galloprovincialis
11/02/2015TOR-3142,66237,8951092Mytilus galloprovincialis
26/02/2015TOR-314,400400188.2Mytilus galloprovincialis
11/03/2015TOR-32,4000301.3Mytilus galloprovincialis
18/03/2015TOR-3n.sn.s326.5Mytilus galloprovincialis
23/03/2015TOR-3n.sn.s181.7Mytilus galloprovincialis
15/04/2015TOR-39,4000210.2Mytilus galloprovincialis
07/03/2016TOR-1n.sn.s208Mytilus galloprovincialis
14/03/2016TOR-12000204Mytilus galloprovincialis
07/03/2016TOR-2n.sn.s277Mytilus galloprovincialis
14/03/2016TOR-26000299Mytilus galloprovincialis
07/03/2016TOR-3n.sn.s190Mytilus galloprovincialis
14/03/2016TOR-34000200Mytilus galloprovincialis
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