The CDC is reporting that 100 people have gotten sick with Salmonella in 19 states since January 28, including 10 people who required hospitalization. The youngest to get sick was just four years old.
Although the source of the Salmonella infections has not definitively been found, many of the sick people "reported consuming sushi, sashimi, or similar foods in the week before illness onset."
Although food poisoning from fish is not unheard of, except for raw oysters, it seems to be usually caused by toxins in some fish and not bacterial poisoning. This includes scromboid poisoning (histamine poisoning), ciguatera poisoning, and puffer fish poisoning, etc.
Do watch for Salmonella symptoms if your kids recently eat sushi, including diarrhea, cramping abdominal pain, and fever.