选择1973年6月～1988年6月的15年间多所医院临床微生物实验室鉴定有丙酸杆菌属菌株(Propionibacterium SP,简称PS)感染的儿童,其病史记录了确定感染存在的部位、相关微生物、病程、外科和病理报告以及可能存在的易感或相关因素。感染标本由微生物实验室严格采集并通过厌氧介质运送和接种到富含维生素K1的布氏菌血 In the 15 years from June 1973 to June 1988, many hospitals in the clinical microbiology laboratory identified Propionibacterium sp. (PS) infection in children, the history of the record to determine the existence of infection sites, related microorganisms , Course of disease, surgical and pathological reports, and possible predisposition or related factors. Infection specimens are collected strictly by the microbiology laboratory and transported and inoculated through anaerobic medium to Brucella bacteria blood enriched with vitamin K1