Many outside factors such as germs,bacteria. viruses and especially fungi can contaminate food if we touch food without proper hygiene. This is just one reason of many reasons.
Yes. Algal toxins are generated during blooms of particular naturally occurring algal species. Shellfish such as mussels, scallops and oysters are more likely to contain these toxins than fish. Algal toxins can cause diarrhea, vomiting, tingling, paralysis and other effects in humans, other mammals or fish.
