The causative agent in k9 salmon posing is a rickettsia bacteria that is most prevalent in our Latitude. This is why Northern Alaskans can feed their dogs raw salmon with little concern. Not all of our fish have it but because the fish has to eat a snail that contains the rickettsia. Some will feed their dogs raw salmon purposely at a young age and monitor their temperature closely and as soon as there is a rise seek medical assistance since early detection is key. Once a dog has survived from a infection then it most likely be immune from future episodes. A risky endeavour but wise for some that plan on having salmon around the house routinely.