[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.