bleach kills everything so if there is any concern of eggs from worms, fleas, or virus shed like distemper or uri, bleach is the only thing that will kill it. When I was doing serious fostering, I bleached my floors daily (wood) because one of the kittens i had for a while was fip questionable. and i was always battling fleas (now there are flea remedies even easier to use than advantage for us multi-cat homes). There are also better remedies now for uri, (once every 2 weeks for only 2 weeks) and for ringworm! (2 oral dosages and done!)
But bleach is the best for killing virus and bacterial inf. everywhere and if you do any volunteer work- bleach the bottom of your shoes when you leave! (i've taken home ringworm from not paying attention to that).