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目的 :了解未加控制措施干预下农村社区蛔虫感染与传播动态。方法 :由 6次横断面调查组成的一年纵向研究。结果 :当地人群感染率常年稳定在 60 %以上 ,但年内社区感染率与感染度 ( EPG)有显著性波动。年龄分层分析进一步表明 ,感染的波动仅在部分儿童具显著性 ,而在几乎所有成人组波动不具显著性。蛔虫在土壤内的发育率变化与年内月平均温度的变化相一致。结论 :该地蛔虫感染呈相对稳定的地方性传播但存在明显季节波动 ,此种波动与季节对土壤中虫卵发育的影响有关 ,儿童是构成社区蛔虫感染波动的主要人群。
Objective: To understand the status of roundworm infection and transmission in rural communities without intervention of control measures. Method: A one-year longitudinal study consisting of 6 cross-sectional surveys. Results: The prevalence of local population was stable at more than 60% year-on-year, but there was a significant fluctuation of community infection rate and infection (EPG) during the year. Stratification by age group further showed that the fluctuation of infection was only significant in some children, but not significant in almost all adults. The development of roundworm in the soil was in accordance with the change of monthly average temperature during the year. CONCLUSIONS: The roundworm infection in this area showed a relatively stable endemic distribution but there was obvious seasonal fluctuation. The fluctuation was related to the season’s influence on the development of eggs in the soil. Children were the main population that constituted the fluctuation of community roundworm infection.