More than likely she will be fine - as well as eating dead stuff mine have caught, killed and eaten rats, rabbits, squirrels etc and rarely suffer and if they do it's diawotsits or a quick vomit on the kitchen floor
It might be wise to treat her for fleas again if she hasn't been done for a while - we got a bad infestation here after the dogs had a rabbit last winter
Obviously rats can carry nasties so keep an eye on her, but as she didn't actually eat it and didn't carry it for very long she should be ok