General Information

Event name: NL-17-001
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 51 ug TTX / kg product)
Associated syndrome: OTHER
Unexplained toxicity: Yes (Causitive organism in scope not confirmed)
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (National Food Safety Programme)
Event occurred before in this location: Yes (Since 2015)
Individuals to contact: POELMAN, Marnix

Location & Date

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Location: Latitude: 51.486667, Longitude: 4.113056
General location information: Yerseke Bank, Eastern Scheldt
HAB Area code(s): NL-03
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2017-06-15
Start: 2017-06-15, End: 2017-06-29
Quarantine levels dates (yyyy/mm/dd): First detection: 2017-06-15, End: 2017-06-22
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 5 µg/l
Additional bloom information: Most likely non-phytoplanktonic organism
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): >20oC Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 30 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 20 °C, Min: 23 °C
Salinity Range During Event:
Bloom location in the water column: Whole column
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mussel Tetrodotoxins TTX 20 LC-MS
Oyster Tetrodotoxins TTX 51 LC-MS
Kit used: No Type of kit used:
Additional information: LC-MS-MS
Economic losses: No economic losses were reported. However, the event took place during the opening of the mussel season. Trade routes were converted to manage stocks.
Management decision: No closure of the area for harvest.
Additional harmful effect information:
Created at 03:43 on 5 Mar 2020
Updated at 02:17 on 14 Apr 2021