If that ever happens again even if the cat doesn't get to it wash it with some bottled water in a pan before you put it back in the tank. Any creature has bacteria in its mouth but if you have a good filtration system it will clean that up in the tank. one of my cats will put its paws on the tank and my African frogs will come to it and try to grab it through the glass its funny really. I have a fix it for you on the escape problem with your frog. Lower the water in your tank the length of the frog fully stretched out and this will keep it from escaping in the future.