What symptoms show that a shellfish has been infected with red tide?

Shellfishes that have been infected with red tide, also known as harmful algal blooms (HABs), may exhibit the following symptoms:

Paralytic Shellfish Poisoning (PSP):

- Gastrointestinal symptoms, such as nausea, vomiting, diarrhea, and abdominal pain.

- Numbness or tingling sensations in the mouth, lips, fingers, and toes.

- Difficulty swallowing or speaking.

- Muscle weakness or paralysis in severe cases.

Amnesic Shellfish Poisoning (ASP):

- Gastrointestinal symptoms, such as nausea, vomiting, diarrhea, and abdominal pain.

- Confusion, disorientation, and short-term memory loss.

- Difficulty recalling recent events or recognizing familiar people or places.

- In severe cases, coma or death.

Diarrhetic Shellfish Poisoning (DSP):

- Gastrointestinal symptoms, such as nausea, vomiting, diarrhea, and abdominal pain.

- Chills, fever, and headaches.

- Dehydration.

Neurotoxic Shellfish Poisoning (NSP):

- Neurological symptoms, such as dizziness, confusion, seizures, and respiratory difficulties.

- Numbness or tingling sensations in the mouth, lips, fingers, and toes.

- Muscle weakness or paralysis.

- In severe cases, coma or death.

It's important to note that symptoms may vary depending on the type of shellfish, the amount consumed, and the individual's sensitivity. If you suspect that you or someone else has consumed shellfish contaminated with red tide, seek immediate medical attention.