The results of the experiment clearly show that ultraviolet light has a lethal effect on Serratia marcescens, but only when having a direct access to the broth culture of Serratia marcescens. UV as a means of disinfection, in a hospital room or operating room, will be limited to surface contaminations or airborne contaminations. This is due to its inability to penetrate through surfaces and have direct contact with the microbial populations. Even though UV light has a reflective component it still will not have the capability to reach all surfaces. It will effectively eliminate this limitation in this environment is serious as bacteria can be in many places in which the UV rays will not have access, and thereby allowing these microbes the ability
