Avoiding the dispersal of infectious materials 1. In order to avoid the premature shedding of their loads, microbiological transfer loops should have a diameter of 2-3 mm and be completely closed. The shanks chould be not more than 6 cm in length to minimize vibration 2. The risk of spatter of infectious material in an open Bunsen burner flame should be avoided by using an enclosed electric microincinerator to sterilize transfer loops Disposable transfer loops, which do not need to be resterilized, are preferableAvoiding the dispersal of infectious materials 1. In order to avoid the premature shedding of their loads, microbiological transfer loops should have a diameter of 2–3 mm and be completely closed. The shanks should be not more than 6 cm in length to minimize vibration. 2. The risk of spatter of infectious material in an open Bunsen burner flame should be avoided by using an enclosed electric microincinerator to sterilize transfer loops. Disposable transfer loops, which do not need to be resterilized, are preferable