随着医疗诊治技术不断更新和发展 ,机会感染日渐增多 ,特别是儿童机会感染。有关机会感染的问题正受到临床医师的广泛重视。通过文献复习 ,就有关儿童机会感染的基本条件、机会感染的病原体 ,以及诊断、治疗问题作如下介绍。机会感染 (ｏｐｐｏｒｔｕｎｉｓｔｉｃｉｎｆｅｃｔ With the continuous update and development of medical diagnosis and treatment techniques, opportunistic infections are increasing day by day, especially children’s opportunistic infections. The issue of opportunistic infections is being widely recognized by clinicians. Through literature review, the following is a brief description of the basic conditions of opportunistic infections in children, pathogens of opportunistic infections, and diagnosis and treatment. Opportunistic infection