You're still statistically at more risk to get salmonella from poorly handled food at your local fast food place or from your own countertop/cutting board. However, Jeff's point is well made. Kissing snakes isn't a good idea and can be a health issue especially for young kids, older folks or those with immune system issues.

We used to have one house rule about the kids and the pets...

"If it can lick it's own butt, we do NOT kiss that animal"

now I've added....

"If it can slither through it's own poop or pee, we do NOT kiss that animal".