Harmful Algal Information System: Event MDG-21-001

General Information

Event name:	MDG-21-001
Country:	MADAGASCAR
Nature of the harmful event:	Seafood toxins , Mass mortalities
Event directly affected:	Humans
Toxicity detected:	No
Associated syndrome:
Unexplained toxicity:
Species implicated in toxin transmission (transvector):	turtle
Report the outcome of a monitoring programme:	No
Event occurred before in this location:	Yes
Individuals to contact:	SCHWEIBOLD Laura , QUOD, Jean-Pascal

Location & Date

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Location:	Latitude: -19.320278, Longitude: 48.981667
General location information:	Vatomandry, East coast HAB Area code(s): MAD-01
Additional location information:
Bloom event dates (yyyy/mm/dd):	Event Date:2021-03-18
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known:	No
Causative Species/Genus:
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:
Event-related bibliography:	https://africa.cgtn.com/2021/03/18/nineteen-die-in-madagascar-after-eating-turtle/

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:

Growth Comments

Additional Environmental information:

Toxin Assay Information

Species containing the toxin

Toxin type

Toxin details

Max. concentration

Assay type

Kit used:

Type of kit used:

Additional information:

Economic losses:

Management decision:

Health authorities have warned against eating turtles, as well two dozen species of fish, which feed on algae that can be toxic during the November-March hot season.

Additional harmful effect information:

34 people hospitalized, 19 died including 9 children

Created at 12:57 on 2 Dec 2021