Objective To investigate the carrying rate of Neisseria meningitidis(Nm) in healthy population gathered in schools in Baoshan City, Yunnan Province, China, and to provide a reference for anal. of the development trend of meningococcal meningitis in the city. Methods A total of 1 076 throat swab specimens were collected from the healthy people at ages of 18∼22 years in Baoshan City, from which Nm was routinely separated, cultured and identified by PCR. Results Seventeen strains of Nm were isolated from 1 076 throat swab specimens, indicating a carrying rate of 1. 58%, among which 14 pos. strains belonged to group B, 2 to group C, and 1 to group X. Conclusion There are asymptomatic carriers of meningococcal meningitis in the campus of Baoshan City, major of which were of group B, followed by group C, and a Nm of group X was isolated.