General Information

Event name: BE-38-001
Country: BELGIUM
Nature of the harmful event:
Water Discoloration , Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Mytilus edulis
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: De Rijcke, Maarten

Location & Date

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Location: Latitude: 51.320556, Longitude: 3.200000
General location information: Brugge-Zeebrugge Canal, Belgian part of the North Sea
HAB Area code(s): BE-01
Additional location information: brackish water
Bloom event dates (yyyy/mm/dd): Event Date:1938-06-16
Quarantine levels dates (yyyy/mm/dd): First detection: 1938-07-15, End: 1938-08-01
Additional date-related information: Exact dates unknown (here middle of month)


Causative organism known: Yes
Causative Species/Genus: Alexandrium ostenfeldii (Paulsen) Balech et Tangen 1985 ( cells/L)
Described by Wolozynska & Conrad (1939) as Gonyaulax phoneus
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Koch, H.J.A. (1940). Dinoflagellaten als oorzaak van verlammende mosselvergiftiging. Natuurwet. Tijdschr. 22(3-7): 196-200; Woloszynska, J.; Conrad, W. (1939). Pyrodinium phoneus, n. sp., agent de la toxicité des moules du canal maritime de Bruges à Zeebrugge. Bull. Mus. royal d'Hist. Nat. Belg./Med. Kon. Natuurhist. Mus. Belg. 15(46): 1-5

Environmental Conditions

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

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Mytilus edulis Saxitoxins STX eq 200µg/100g Bioassay-Mouse
Mytilus edulis Saxitoxins STX 1000 MU Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: The sensitivity of the mouse strain is not known. The US FDA accepted conversion factor of 0.2 µg per MU was used.
Economic losses: Unknown
Management decision: Unknown
Additional harmful effect information: 16 persons became ill, 4 died
Created at 03:13 on 27 Sep 2017
Updated at 04:11 on 2 Oct 2017