Paralytic Shellfish Poisoning (PSP) - Causative Organisms:
Alexandrium spp.
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| Alexandrium tamarense (Photo credit - Larry Fritz) |
  | Alexandrium tamarense - cyst form (Photo credit - Y. Fukuyo) |
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|   | Immunofluorescently-labeled Alexandrium cell sp. (most likely fundyense) (Photo credit - Kristin Gribble/WHOI) |
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