Analysis on surveillance of soil-transmitted nematode infections in Wuming County of Guangxi from 2006 to 2010

Objective To understand the prevalence of soil-transmitted nematode infections in Wuming county,and to provide the scientific evidence for establishing the control policy and evaluating the effectiveness of prevention.Methods From 2006 to 2010,fecal samples of the inhabitants of 3 years old and above were collected,the Kato-Katz's thick smears was used to detect the eggs of soil-transmitted nematode and cellophane tape was used to detect the eggs of pinworm for children aged between 3 and 12 years.Roundworm eggs in soil were tested by modified saturated sodium nitrate floatation method.The living abiliti of roundworm eggs was determined by light microscope.Results Totally 5 216 people were examined from 2006 to 2010,including 2700 males and 2472 females.The infection rates of soil-transmitted nematode were 4.09％,3.41％,1.44％,2.65％ and 1.14％ respectively,with a trend of decreasing each year.In terms of infection intensity,all of the infection was light.And the pinworm infection rates of children aged between 3 and 12 years were 27.69％,17.36％,25.86％,23.76％ and 18.97％ respectively during the five years.200 soil samples collected from different environments were examined,roundworm egg was found in 12 samples,and 2 were alive.Conclusion The epidemic of soil-transmitted nematode had already stepped into the low infection stage at surveillance sites.However,the pinworm infection rate in children maintained at a high level.Therefore,it is very important to strengthen comprehensive prevention and control measures in children. Key words: Nematode infection; Soil-transmitted nematode; Prevalence; Surveillance