BACKGROUND
To investigate the epidemic situation of Japanese encephalitis (JE) in three provinces, Guizhou, Sichuan, and Hubei in 2005.
METHODS
Information about epidemic situation of JE, mosquitoes specimens were collected and titers of JE virus in hosts in the above three surveillance sites were determined.
RESULTS
The reported cases of JE in Guizhou, Sichuan, and Hubei province accounted for 40.7% of total cases in 2005 in China. The numbers of cases in Guizhou and Sichuan ranked at the first two in China, morbidity exceeded 1/100,000, which was higher than average level in China. Zero to 10 years old children accounted for 90% in reported cases. Most of the cases were children lived at home. Almost all JE cases were presented from June to September, but most cases were reported between July and August. Investigaton of the density of vector showed that the dominant mosquitoes were Culex, especially the Culex tritaeniorhynchus.
CONCLUSION
The epidemic status of JE was similar among the three provinces and the whole country. The number of JEV cases in Guizhou and Sichuan were the highest in China.