|The Jämthund is also known as the Swedish Elkhound|
Standards for the Jämthund seem to emphasize a strong, sturdy, capable dog. Interestingly enough, there are a number of marked points that now differentiate this breed from the Norwegian Elkhound, including such things as tail curl and some notes on facial structure. Temperament calls for an energetic dog that is courageous and capable, but also very calm. There is a strict color standard, allowing only one color with specifics to where the pale markings on the dog must be, and also what they look like. Some of the traits deemed unfavorable are also interesting, such as not fitting the aforementioned color standard and having anything other than a loosely curled tail with fur that's rather profuse. The really is a lot of mention of coat markings and the tail.
As for health in this breed, I have found evidence of hip dysplasia, thyroid issues, renal issues, cysts, and progressive retinal atrophy.
Sources are Fédération Cynologique Internationale, United Kennel Club, PubMed, MyPets, and Svenska Jämthundklubben. Image is from Wikimedia Commons under a Creative Commons license.