一.传染原传染原是引起院内感染的重要因素之一,而医院存在着大量病原微生物是感染形成的有利条件,这些病原微生物就是传染原。二。传播途径传播途径是传染链中的第二个环节,病原微生物由一个人传播到另一个人,或从动物传播到人的过程中,必然要经过一定的方式,所谓传播途径就是病原 The original infection of the original infection is one of the important factors causing nosocomial infection, and the hospital there is a large number of pathogenic microorganisms is favorable conditions for the formation of infection, these pathogenic microorganisms is the original infectious agent. two. The route of transmission The route of transmission is the second link in the chain of infection. The transmission of pathogenic microorganisms from one person to another or from animals to humans inevitably has to go through a certain way. The so-called route of transmission is the pathogen