parasites

The spicy salmon handroll is my favourite thing to get at sushi.
I was reading this article at Scientific American Are urban tapeworms on the rise?

How Safe is Your Sushi?
....Tapeworms are a common parasite in freshwater fish and so any type of raw freshwater fish should be avoided. The good news with flukes and tapeworms is that most can be treated with simple medication.
....Wild caught salmon are almost always found with parasites while their farmed cousins rarely are found with parasites. Most incidences involving a person contracting a parasite from sushi are from people preparing it at home and eating raw, wild caught salmon.


CDC Emerging Infectious Diseases article on Eating Raw Pacific Salmon