Objective To carry out national surveys for ascertaining the current status and trends of soil-transmitted nematode infections in China, providing scientific basis for further developing control strategies. Methods In...Objective To carry out national surveys for ascertaining the current status and trends of soil-transmitted nematode infections in China, providing scientific basis for further developing control strategies. Methods In 1988-1992 （hereinafter abbreriated as ＂survey in 1990＂）, a stratified cluster random sampling method was used in the survey. In 2001-2004 （hereinafter abbreriated as ＂survey in 2003＂）, in order to compare with the survey in 1990, two-characteristic stratified cluster random sampling method was used and 687 investigation spots were sampled from the 2848 spots selected in the survey in 1990. Kato-Katz thick smear method was used to examine the eggs of soil-transmitted nematodes in fecal samples. Results The prevalence rates were 53.6% and 19.6% for soil-transmitted nematodes, 14.6% and 6.120% for hookworms, 44.6% and 12.7% for Ascaris lumbricoides, 17.4% and 4.630% for Trichuris trichiura in survey 1990 and survey 2003, respectively. The prevalence rates of soil-transmitted nematodes were higher in 13 provinces than the average level in China in the survey in 1990, and higher in 8 provinces than the average level in the survey in 2003. The prevalence of hookworms, Ascaris lumbricoides, Trichuris trichiura and the overall prevalence of soil-transmitted nematodes were higher in females than in males. It is estimated from the results of survey in 2003 that the number of persons with soil-transmitted nematode infections in the country is about 129 million, less than that in the survey in 1990. Conclusion The prevalence of soil-transmitted nematodes has declined considerably but is still relatively high in some provinces and autonomous regions. Control activities and socioeconomic development may have contributed to the decreased prevalence.展开更多
目的：分析改良加藤厚涂片法（Kato-Katz）1送3检中单次涂片检出率规律，并探索单次涂片检出率与粪便中虫卵密度的相互关系。方法2006-2010年，每年9-11月在安徽省蒙城县监测点采集3周岁以上常住居民的粪便，采用改良加藤厚涂片法（1送...目的：分析改良加藤厚涂片法（Kato-Katz）1送3检中单次涂片检出率规律，并探索单次涂片检出率与粪便中虫卵密度的相互关系。方法2006-2010年，每年9-11月在安徽省蒙城县监测点采集3周岁以上常住居民的粪便，采用改良加藤厚涂片法（1送3检）检查蛔虫、鞭虫和钩虫卵；以片均虫卵数（eggs per slide，EPS）作为描述粪便虫卵密度的计算单位。对虫卵在3张涂片中的各自出现概率进行分析和对比。结果3张涂片的虫卵出现率差异均无统计学意义。当EPS〈2时，单张涂片的虫卵平均出现率为52.26%；当EPS≥16时，单张涂片虫卵出现率可达99.26%。结论单张涂片的虫卵平均出现率与EPS存在一定关联。展开更多
文摘Objective To carry out national surveys for ascertaining the current status and trends of soil-transmitted nematode infections in China, providing scientific basis for further developing control strategies. Methods In 1988-1992 （hereinafter abbreriated as ＂survey in 1990＂）, a stratified cluster random sampling method was used in the survey. In 2001-2004 （hereinafter abbreriated as ＂survey in 2003＂）, in order to compare with the survey in 1990, two-characteristic stratified cluster random sampling method was used and 687 investigation spots were sampled from the 2848 spots selected in the survey in 1990. Kato-Katz thick smear method was used to examine the eggs of soil-transmitted nematodes in fecal samples. Results The prevalence rates were 53.6% and 19.6% for soil-transmitted nematodes, 14.6% and 6.120% for hookworms, 44.6% and 12.7% for Ascaris lumbricoides, 17.4% and 4.630% for Trichuris trichiura in survey 1990 and survey 2003, respectively. The prevalence rates of soil-transmitted nematodes were higher in 13 provinces than the average level in China in the survey in 1990, and higher in 8 provinces than the average level in the survey in 2003. The prevalence of hookworms, Ascaris lumbricoides, Trichuris trichiura and the overall prevalence of soil-transmitted nematodes were higher in females than in males. It is estimated from the results of survey in 2003 that the number of persons with soil-transmitted nematode infections in the country is about 129 million, less than that in the survey in 1990. Conclusion The prevalence of soil-transmitted nematodes has declined considerably but is still relatively high in some provinces and autonomous regions. Control activities and socioeconomic development may have contributed to the decreased prevalence.
文摘目的：分析改良加藤厚涂片法（Kato-Katz）1送3检中单次涂片检出率规律，并探索单次涂片检出率与粪便中虫卵密度的相互关系。方法2006-2010年，每年9-11月在安徽省蒙城县监测点采集3周岁以上常住居民的粪便，采用改良加藤厚涂片法（1送3检）检查蛔虫、鞭虫和钩虫卵；以片均虫卵数（eggs per slide，EPS）作为描述粪便虫卵密度的计算单位。对虫卵在3张涂片中的各自出现概率进行分析和对比。结果3张涂片的虫卵出现率差异均无统计学意义。当EPS〈2时，单张涂片的虫卵平均出现率为52.26%；当EPS≥16时，单张涂片虫卵出现率可达99.26%。结论单张涂片的虫卵平均出现率与EPS存在一定关联。
