The bite itself does not cause tetanus but it allows a break into the skin that can provide the tetanus bacteria ("Clostridium tetani") with a way to enter the body.
"Would you please let me join your p-p-party?
"a fight theme for Fluttershy?! Psssh, good luck"
-me, until 5 minutes ago
This song is at the end of ParaNorman and I can't stop listening to it.