Objective To investigate the prevalence of key human intestinal helminth infections in Yongxing County, Hunan Province, China, so as to provide a scientific basis for parasitic disease prevention and control. Methods An administrative village each from five townships (located in the eastern, western, southern, northern, and central regions, respectively) was randomly selected in Yongxing County, Hunan Province from 2016 to 2020. At least 200 permanent residents ≥3 years old were surveyed at each surveillance point every year. The intestinal worm eggs were examined by using the Kato-Katz technique. The hookworm species was identified by using filter paper culture. The pinworm eggs were examined by using the anal swab method with a transparent tape for children aged 3 to 9 years. WPS Excel 2021 software was used to establish the database, and SPSS 20.0 software was used to conduct statistical analysis. The infection rate was compared using the Chi-squared test. Results A total of 5 066 persons were examined for worms in feces, with a rate of key intestinal worm infections of 2.68% (136 cases). The infection rates for roundworms, hookworms, pinworms, whipworms, and liver flukes were 1.99%, 0.24%, 0.20%, 0.18%, and 0.08%, respectively. No co-infection was detected. The results of 12 hookworm larvae culture samples were all Necator americanus. The anal swab test detected a pinworm infection rate of 0.33% among a total of 1 500 children aged 3 to 9 years. The overall key intestinal worm infection rates from 2016 to 2020 were 4.08%, 1.97%, 3.24%, 1.10%, and 3.00%, respectively. Conclusion The key human intestinal worm infection rate is at a low epidemic level in Yongxing County, Hunan Province, but the infection factors still exist. It is necessary to strengthen categorical surveillance and promotion and education of parasitic disease prevention and control knowledge.
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