机会感染是指正常情况下致病力低的较少见微生物引起的感染;或指机体防御机能严重损害时发生的感染。近年来,由于对免疫缺陷疾病的认识不断深入及免疫抑制药物的普遍应用,机会感染已日益多见,成为现代医学中越来越重要的课题。对机会感染的近代认识一、病原:机会感染虽可由常见的病原微生物引起,但在许多情况下常是由致病力弱的少见微生物并往往是患者自身微生物引起的自身感染。常见 Opportunistic infections are infections caused by less common microorganisms that are less virulent under normal conditions; or infections that occur when the defense function of the body is severely impaired. In recent years, due to the deepening of the understanding of immunodeficiency diseases and the universal application of immunosuppressive drugs, opportunistic infections have become increasingly common and become more and more important topics in modern medicine. Modern understanding of opportunistic infections I. Pathogens: Although opportunistic infections can be caused by common pathogenic microorganisms, in many cases they are often caused by a rare, virulent and often self-infected microorganism. common