【摘要】 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。更多还原

【Abstract】 AIM:To study the dynamics of Ascaris infection in rural communities where interven- tion measurements were not introduced.METHODS:An one- year longitudinal study con- sisting of 6 cross- sectional surveys at about two- month interval was carried out.RESULTS: A high prevalence of above6 0 % throughoutthe year was found in the area with a significant fluctuation in both prevalence and intensity (EPG) of the communities.Age- stratified analy- ses further indicated that the fluctuation was only found to be significant in some children groups other than adult groups.Changes in monthly development rate of eggs of A.lumbri- coides in soil was found in good accordance with the fluctuation of monthly mean temperature in the area during the year.CONCLUSION:The transmission of Ascaris infection in this area was relatively stable but with significant fluctuation in both prevalence and intensity during the year.The fluctuation could be attributed to the seasonal effects on the develop- ment of A.lumbricoides eggs in soil.Children were found to be the main population con- tributing to the fluctuation of Ascaris infection in the communities.更多还原