Rodents can carry their own mites, but they aren't the same as what snakes get & they won't bother your snake. (rodent mites might like YOU though)

It's far more likely that your snakes has sustained a rodent bite that you didn't notice. When a snake constricts a rodent, they can often turn just enough
to fight back & bite the snake...even though the snake "wins", they can sustain injuries that result in infections that are hard to treat or potentially fatal.
Even just a small bite wound can trigger extra sheds- that's the snake's body, trying to make repairs. I highly recommend you do your best to switch your
snake to eating dead prey...even if you have to kill it fresh, then offer. It's much easier to KEEP snakes healthy, than to make them well again once they
are injured or sick. And vet care also impactd your finances.