Working in and around the construction trades for years I can tell you that this is common practice for electricians and carpenters. I have seen people in the construction trades close serious cuts with either electrical or duct tape and go back to work with out a second thought. I can't find anything about it on the subject right now but I have seen books that say that that duct and electrical tape have an antibacterial peoperties. I don't know if it's true or not but I have seen serious injuries healed without infection in a very dirty enviroment without any other treatment.