Analysis on Pathogenic Epidemiology of AFP Cases in Guangdong Province in 2003

The pathogenic epidemiology of AFP cases in 2003 in Guangdong was analyzed. 279 stool samples were collected from AFP cases, 25 strains of polio virus (PV) were isolated and the isolation rate was 8.96%. All PV strains were vaccine-associated poliovirus. Including 14 PVⅡ strains. 15 strains of non-poliomyelitis enterovirus (NPEV) were isolated, the isolation rate was 5.39%. It was lower than that during 1994-2001 and annually gradually decreased but similar with that in 2002. After analyzing the relationships among the immunized history, sex, age, and pathogen results of AFP cases, the results showed that the isolation rate among AFP cases with zero dose immunization was higher than those among the children with 1-2 doses and 3 doses, the rates were 43.75%, 22.22%, and 2.37% respectively. The PVⅡ isolation rate of 18 residue paralysis cases after onset of disease for 60 days was higher accounting for 38.90%.