Domoic Acid and Shellfish Safety

Domoic acid is a potent neurotoxin causing amnesic shellfish poisoning (ASP), first identified in a 1987 Canadian outbreak. ASP symptoms range from gastrointestinal issues to severe neurological effects, including memory loss and seizures. Domoic acid is produced by diatoms and can contaminate marine life, affecting both humans and wildlife. While rare in humans, monitoring and regulation are crucial for safety. The toxin's prevalence may increase due to ocean acidification. Food professionals should include domoic acid in safety plans and source seafood from reputable suppliers.

What unusual symptoms were observed in the 1987 domoic acid outbreak in Canada?

• Memory loss and seizures

• Only gastrointestinal symptoms

• Respiratory issues

• Skin rashes and fever

Which of the following is a long-term effect of Amnesic Shellfish Poisoning?

• Temporary blindness

• Permanent brain damage

• Chronic fatigue

• Liver failure

Domoic acid is naturally found in which of the following?

• Freshwater lakes

• Desert plants

• Mountain rocks

• Diatom phytoplanktons

What was a historical use of domoic acid by Japanese Islanders?

• As a food preservative

• As a medicinal tonic

• As a dye for fabrics

• As a building material

How do fisheries authorities ensure the safety of shellfish regarding domoic acid?

• By genetically modifying shellfish

• By using sonar technology

• By monitoring and closing affected areas

• By adding chemicals to the water

What advice is given to recreational shellfish harvesters to avoid domoic acid poisoning?

• Use special fishing nets

• Harvest during the night

• Avoid areas with red tides

• Eat only raw shellfish

Why is domoic acid poisoning in humans considered extremely rare?

• Because it is only found in freshwater

• Due to effective monitoring and control measures

• Because it is not harmful to humans

• Due to its rapid degradation in sunlight

What should food professionals include in their safety plans regarding domoic acid?

• Use of artificial preservatives

• Regular taste tests

• Domoic acid monitoring

• Increased salt usage

What environmental change is expected to increase the prevalence of domoic acid?

• Ocean acidification

• Increased rainfall

• Global cooling

• Deforestation

Which method is used to identify domoic acid in shellfish?

• High performance liquid chromatography

• Magnetic resonance imaging

• X-ray diffraction

• Ultrasound imaging