The patient doesn't need to come back in and he/she will be fine. The chances of the patient being colonized are already really really low. First, you were using hibiclens and second, colonization is usually hard with just a possible snot drop. Even if it did land on the wound, it would have to compete with the body's natural flora among other things. Let's say it does get colonized with MRSA; it still doesn't mean the wound will eventually get infected. Whether a wound gets infected is based on factors like nutrition/hydration, immune status, location and size of the wound. As long as they do the proper wound care and keep the wound clean, dry, and intact, the wound will heal with no problems.