埃及-49项目地区埃及血吸虫和曼氏血吸虫感染的流行病学。4. 血吸虫病发病率的测定。
The epidemiology of Schistosoma haematobium and S. mansoni infections in the Egypt-49 project area. 4. Measurement of the incidence of bilharziasis.
作者信息
Farooq M, Hairston N G
出版信息
Bull World Health Organ. 1966;35(3):331-8.
The measurement of incidence, or the rate at which people become positive, for Schistosoma haematobium and S. mansoni was carried out in four parts of the Egypt-49 project area near Alexandria. For S. haematobium, rates as high as 22.8% per year were found for children 0-6 years old in a rural area; in the same area, the incidence of S. mansoni was 8.5% per year. The true incidence is underestimated because many cases become negative spontaneously. This loss rate of S. haematobium cases is 0.476 per year for children 0-4 years old, and 0.049 per year for those aged 5 and 6 years; for S. mansoni, the rates are 0.580 and 0.327, respectively. Despite the error, incidence is the most accurate and sensitive method of assessing the success of control operations, and is an important measurable parameter in epidemiology.
在亚历山大港附近的埃及-49项目区域的四个地点，对埃及血吸虫和曼氏血吸虫的发病率（即人们感染呈阳性的比率）进行了测量。对于埃及血吸虫，在一个农村地区，0至6岁儿童的年感染率高达22.8%；在同一地区，曼氏血吸虫的年发病率为8.5%。由于许多病例会自行转阴，所以实际发病率被低估了。埃及血吸虫病例在0至4岁儿童中的年转阴率为0.476，5至6岁儿童的年转阴率为0.049；对于曼氏血吸虫，相应的比率分别为0.580和0.327。尽管存在误差，但发病率仍是评估防治行动成效最准确、最敏感的方法，也是流行病学中一个重要的可测量参数。
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