It is not that bears and pigs are really related, it is because of what they eat.They get infected by eatingraw meat from other infected animals. Pigs that are wild and eat anything, including dead animals, and domestic pigs that are fed raw garbage are subject to getting trichinosis. Bears are suseptable because they will also eat anything, especially dead animals that could be infected, which infects them.

I am not sure if the jerking process would kill trichina organisms or not, but I don't think I would want to try it.

As an interesting side note, it has been illegal to feed raw garbage to pigs in the US for years. That lowers the odds that a pig would be infected to almost 0% in a commercial setting, but not for wild pigs.

That said, as bad as the disease is, I won't ever be eating any pig or bear meat that has not been thouroughly cooked!