Analysis on Monitoring and Control of Elimination of Poliomyelitis from 1989 to 2003 in Dezhou City

Objective This analysis was designed to learn about the operation of monitoring and con-trol system for poliomyelitis (PM) in Dezhou．Methods Data from 1989 tO 2003 were collected for analysis and evaluation．For AFP cases，double samples of feces were collected；for part of AFP contac-tors and healthy population，feces samples were gathered for enterovirus determination and 2 432 serum samples of healthy people were administered PM neutralization antibody testing．Results Since the es-tablishment of monitoring system for acute flaccid paralysis (AFP) in 1991，477 cases had been reported in the entire city．Since 1994. The onset rate of non-PM reporte- had been in accord with the index of 1/lakh proposed by WHO．Since 1995，the timely reporting rate，in-time investigation rate，rate 0f double specimens collection，rate of timely submission for determination and follow-up rate had all been over 90％，which attained the index of 80％ stipulated by the Minister of Health．The vaccination rate of Trivalent Oral Polio Vaccine (TOPV) maintained over 90％，within which children aged between 0 and 4 years old had a vaccination rate of reinforeed immunization over 95％．Since October of 1990，no wild-type virus cases of PM had occurred．Antibody testing demonstrated that the positive antibody rate of type III PM was kept above 95％and no PM virus were detected from specimens of AFP cases．Con-tactors and healthy population in enterovirus testing．Conclusion The AFP monitoring system works well in Dezhou．Due tO the establishment of relatively strong immunization barrier among PM popula-tions，the possibility of PM epidemic is reduced tO the lOWest．