[Strategy of schistosomiasis elimination and its effects in Jinhu County, Jiangsu Province]

OBJECTIVE

To understand the strategy of schistosomiasis elimination and its effects in Jinhu County, Jiangsu Province.

METHODS

The data of schistosomiasis control in Jinhu County at different stages from 1970 to 2017 were collected and analyzed.

RESULTS

From 1970 to 2017, there were three stages of schistosomiasis control, including transmission control, transmission interruption, and monitoring and elimination stages in Jinhu County. The main measures included Oncomelania hupensis snail control, infectious source control, and health education. A total of area of 290 691.78 hm² was detected in Jinhu County, and the area with snails was 3 420.98 hm². There were 8 729.37 hm² area with snails was controlled. Since 2014, no O. hupensis snails were found. A total of 525 377 person-times were examined for schistosomiasis, with 2 815 schistosomiasis patients identified, and 2 844 person-times were treated by chemotherapy. In addition, 977 cases received the expand chemotherapy. Since 1990, no local schistosome-infected persons were found. In 2017, the awareness rate of schistosomiasis control knowledge and the correct rate of health behavior were increased by 54.59% and 14.23% respectively compared with those in 1992.

CONCLUSIONS

The comprehensive schistosomiasis control measures implemented in Jinhu County at different periods have achieved remarkable outputs and accelerated the schistosomiasis elimination process. However, the precise control measures should be implemented in the future to consolidate the prevention and control achievements.

[Final evaluation of Control Program of Key Parasitic Diseases in Jinhu County (2006-2015), Jiangsu Province]

OBJECTIVE

To evaluate the implementation of the Control Program of Key Parasitic Diseases in Jinhu County from 2006 to 2015, so as to provide the evidence for the future work of prevention and control.

METHODS

The historical data about key parasitoses were collected, and the organization management, financial support, capacity building, control effects, and so on were evaluated with the descriptive method.

RESULTS

From 2006 to 2015, totally 19 technique educations were conducted, 844.2 thousands RMB was invested, and 1 725 person-times of technicians were trained. Totally 197 600 person-times of drug administration were performed and 11 762 person-times of residents were tested for parasites, with the infection rates of soil-transmitted nematodes fluctuating from 0.16% to 2.18%. The infection rates of Clonorchis sinensis were from 0.00% to 0.67%, and the infection rates of its intermediate hosts were from 3.81% to 9.48%. No imago and larva of Angiostrongylus cantonensis were found in the longitudinal surveillance. In 2013, the awareness rate of health related knowledge was up to 95.62%, and the correct rate of health behaviors was up to 96.46%. Totally 3 764 villages were renovated, and the beneficial rate of tapwater was up to 98.90%. The popularity rate of household toilets was up to 95.31%, and the popularity rate of harmlessness health toilets was up to 93.45%.

CONCLUSIONS

The endemic situation of key parasitoses is in a low state in Jinhu County, however, the transmitted risk still exists, and therefore, the surveillance work need to be enhanced.

[Epidemiological situation of human parasitic diseases through three investigations in Jinhu County, Jiangsu Province]

OBJECTIVE

To understand the epidemiological situation of human parasitic diseases in Jinhu County, so as to provide the evidence for formulating further control strategy.

METHODS

The investigated local residents were sampled by the random cluster sampling method in 1989, 1999 and 2015. The infections of intestinal helminthes were detected by Kato-Katz technique, the eggs of Enterubius vermicularis were examined by cellophane anal swab for children, the intestinal protozoa were examined by the saline smear and iodine staining methods.

RESULTS

The total rates of parasitic infections were 62.57%, 9.32% and 0.49% in 1989, 1999 and 2015, respectively. Compared to those in 1989 and in 1999, the infection rate in 2015 was decreased by 99.22% and 94.74%, respectively. The numbers of detected parasite species were 14, 10 and 4 in 1989, 1999 and 2015, respectively. The intensities of infections were mainly mild in three investigations, and the intensities of all the infections in 2015 were mild. The species of infected parasites were mainly single, however, multiple infections were observed in 1989, including 4 parasite species (0.72%) and 3 parasite species (7.02%). Only in 1989, the difference between sexes was significant and the infection rate of the female was higher than that of the male (χ² ＝18.01, P＜0.01).

CONCLUSIONS

The infection rates of human parasites are decreased gradually and stabilized at the low level in Jinhu County. However, the surveillance work still should be strengthened to consolidate the achievement.