A lot of chinese an japanese people were parasited by a specially repulsive nematode eating sushi and other similar food... however, this kind of infection is very discrete, so, it´s not noticed in most cases, but it can cause several problems, and... man ! worms in our body are digusting !!!
P.D: this nematodes are not killed using salt, because they have resistance eggs specially designed to avoid thit problem, a many others. The only way is eating well fried fishes