ABSTRACT
Objective To understand the prevalence of soil-transmitted nematode infections in Yancheng City from 2016 to 2020, so as to provide insights into the development of the scheme for further soil-transmitted nematodiasis surveillance. Methods Soil-borne nematode infections were detected using the modified Kato-Katz method (two slides for one sample) among the permanent residents living in Yancheng City from 2016 to 2020, and Enterobius vermicularis infection was additionally detected among children at ages of 12 years and lower using the adhesive cellophane-tape perianal swab method. The prevalence and intensity of human soil-borne nematode and E. vermicularis infections were descriptively analyzed. Results A total of 51 259 person-time residents were detected for soil-borne nematode infections in Yancheng City from 2016 to 2020, and 48 egg-positives were identified, with a 0.09% prevalence. The soil-borne nematodes infecting residents included Ascaris lumbricoides, hookworm and Trichuris trichiura, with 0.04%, 0.05% and 0.002% prevalence rates of infections, and all infections were mild. There was a region-specific prevalence of soil-borne nematode infections in Yancheng City (χ2 = 18.21, P = 0.02), with the highest prevalence seen in Funing County (0.21%), while no infections were detected in Dafeng District for five successive years. The overall prevalence of E. vermicularis infections was 0.22% among children at ages of 12 years and lower in Yancheng City. Conclusions The prevalence of soil-borne nematode infections appears a gradual decline in residents living in Yancheng City from 2016 to 2020, and is at an extremely low level. Further surveillance of soil-transmitted nematodiasis requires to be intensified targeting key regions and populations to consolidate the control achievements.
ABSTRACT
Objective To understand the epidemiological trend of imported malaria and its monitoring and control effect in Yancheng City from 2011 to 2015,so as to provide the evidence for adjusting the prevention and control strategy. Methods The data of malaria surveillance,epidemic,prevention and control were collected and analyzed in the districts and counties of Yancheng City from 2011 to 2015. Results From 2011 to 2015,there were 104 imported malaria cases reported,and the most cases(52 cases,50％)were reported from Jianhu County. Most of the cases were males(only 2 females),the average age was 38.8 years,and the occupation was mainly labor service worker abroad(94 cases,97％). The infection source of these cases mainly came from Africa. From 2011 to 2015,151980 fever patients received malaria blood tests,and the positive rate was 0.07％. Falciparum malaria cases were the most(90 cases,86.5％). The confirmed diagnostic rate of malaria within 24 hours in-creased year by year. All the 104 patients received the standardized treatment. Conclusion There are no local malaria cases in Yancheng City from 2011 to2015,and in the next stage,the monitoring and prevention should be focused on imported malaria, including shortening the confirmed diagnostic time and improving the diagnostic efficiency.
ABSTRACT
Objective To investigate the epidemiological trend of human intestinal helminth infections in Yancheng City,Ji?angsu Province from 2006 to 2015,so as to provide the evidence for formulating further control strategies. Methods The sur?veillance data of human intestinal helminth infections were collected and analyzed in Yancheng City from 2006 to 2015. Re?sults From 2006 to 2015,110 746 person?times of residents in Yancheng City were surveyed in Yancheng City,and 1 732 samples were positive of human intestinal helminth infections. The infection rate of human intestinal helminthes was highest in 2006[4.59%(410/8 941)],and lowest in 2013[0.19%(23/12 165)]. The infection rate of human intestinal helminthes was significantly decreased over time(χ2=27.78,P<0.001). The human infection rates of Ascaris lumbricoides,hook worm and Trichuris trichura were all decreased over time(Z=-27.75,-22.23 and-16.17,all P<0.001)from 2006 to 2015,with the re?duction rates of 96.57%,92.31%and 96.47%,respectively. The average EPG of A. lumbricoides,hook worm and T. trichura were 2 534,360 and 154 respectively,and 1 694(97.81%)cases were light infections. Totally 1 174 cases of Enterobius vermic?ularis were found in children under 12 years old,and the cases were decreased over time(χ2 =12.46,P<0.001). Conclu?sions The infection rate of human intestinal helminthes in Yancheng City decreases over time from 2006 to 2015,and the con?trol work is effective. The control work of focus groups and environmental management and health education should be strength?ened in the future.