关键词: 恙虫病, 描述流行病学

Abstract:

Objective To determine the epidemiological characteristics of scrub typhus in Panzhihua city, providing the basis for development of targeted prevention and control measures. Methods Descriptive epidemiological approaches were employed to analyze the spatial and temporal distribution of 255 scrub typhus patients reported via the Chinese Disease Prevention and Control Information System in Panzhihua city from 2006 through 2008. Results The largest number of reported cases was present in 2008, accounting for 58.4% of the 255 cases. With peaking incidence rates from June to October, the cases in this period accounted for 89.4% of the total number. Most cases were from rural areas, accounting for the 96.9% of the reported number throughout the city, of which those from Miyi accounted for 59.6%. Patients were noticed in all age groups, though most were adults over 19 years of age, accounting for 68.6%. Farmers were the primarily affected occupation, accounting for 67.5%, followed by students and young children, accounting for 14.5% and 13.7%, respectively. Suspected cases constituted the largest reported portion, accounting for 52.2%, followed by clinically diagnosed ones, accounting for 45.5%; only 6 cases were confirmed through laboratory diagnosis. Most reporting institutions were at county-level, accounting for 62.4%，followed by municipal and town-level ones, accounting for 23.5% and 14.1%, respectively. Conclusion In view of the noticeable seasonal and regional dynamics of the incidence of scrub typhus and the primarily affected group, farmers, in Panzhihua city, the prevention and control measures should be focused on the rural areas in summer and autumn.

Key words: Scrub typhus, Descriptive epidemiology