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目的了解2007-2009年天津农业高危人群中蜱源性立克次体感染率的变化特点。方法整群抽取天津8个区县作为调查点,每年7月至9月采样,3年共调查研究对象886例,抽取静脉血分离血清,运用间接免疫荧光方法检测人粒细胞无形体、西伯利亚立克次体及查菲埃立克体IgG抗体,分析各年感染率变化特点。结果天津市农业人群无形体感染率较高,主要分布在东部的汉沽区,2008年为52.0%;中部的东丽区2009年为70.6%,3年间总感染率增加33.3%。查菲埃立克体抗体3年总检出率为2.6%~4.4%,主要集中在中部和南部地区;西伯利亚立克次体抗体检出率最低(1.6%~2.0%),主要集中在天津中部和北部地区。结论天津地区普遍存在蜱源立克次体感染,其中以无形感染最为常见;感染率变化趋势存在地域差异。
Objective To understand the changing characteristics of tick-derived rickettsial infection in high-risk agricultural population in Tianjin from 2007 to 2009. Methods A total of 8 districts and counties in Tianjin were selected as the survey sites and sampled from July to September each year. A total of 886 subjects were investigated in the past three years. Serum was extracted from the venous blood and indirect immunofluorescence was used to detect the anamorphs of human granulocytes. Gram body and Chafie Ehrlichia IgG antibody, analysis of changes in infection rate characteristics. Results There was a high prevalence of apomixis in agricultural population in Tianjin, which was mainly distributed in Hangu District in the east, 52.0% in 2008; in Dongli District in central China, it was 70.6% in 2009, and the total infection rate increased 33.3% in three years. The total detection rate of Chafiri Ehrlich antibodies was 2.6% -4.4% in three years, mainly in the central and southern areas; the detection rate of Sickleria rickettsis antibody was the lowest (1.6% -2.0%), mainly in Tianjin Central and northern regions. Conclusion Tricuspid tick infection is common in Tianjin, of which invisible infection is the most common, and there are geographical differences in the trend of infection rate.