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为了解马鞍山市城乡中小学生常见肠道蠕虫感染状况,进一步探讨防治措施,我们于1998年3～4月份对我市城市和郊区农村的中小学生开展了常见肠道蠕虫感染调查。1 对象和方法1.1 调查对象 对我市(不含郊县)中小学按经济文化水平的高、中、低,按分层整群抽样的方法,抽取中学三所、小学三所共六所学校为调查单位,为了便于连续追踪研究,确定每个年级的
To understand the common intestinal worm infection among primary and secondary school students in urban and rural areas of Ma’anshan City and to further explore prevention and control measures, we conducted a survey of common intestinal helminth infection among primary and secondary school students in our city and rural areas from March to April 1998. 1 Subjects and methods 1.1 The survey of primary and secondary schools in our city (excluding counties) according to the level of economic and cultural level of high, medium and low, according to stratified cluster sampling method, secondary schools, three primary schools three total of six schools For the investigation unit, in order to facilitate continuous follow-up study to determine the grade of each grade