Salmonella is actually in the snake's digestive tract, and I believe it helps them digest their food. The concern with salmonella has to do more with the snake's waste than it's mouth, so I don't think you need to worry about it with a bite. I've heard feeding-related bites are worse than fear-related ones mostly because the snake doesn't plan on letting go when they strike at prey, versus nipping at a threat to warn them away. I've also heard that being bitten is just part of owning snakes, so let us know when you do have your first experience! (I've not had mine yet either.)
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