Changes in the epidemiological characteristics and control progress of soil-transmitted nematodiasis in Hainan Island

doi:10.12140/j.issn.1000-7423.2025.02.016

Abstract

Abstract:

Hainan Island locates in tropical regions of China, and the climatic and natural environmental conditions are feasible for transmission of multiple types of soil-transmitted nematodiases. This review summarizes the changes in the prevalence of soil-transmitted nematode infections, soil-transmitted nematodiasis control measures and the effectiveness of these control measures in Hainan Island during the past 70 years. The prevalence of soil-transmitted nematode human infections decreased from 94.7% in 1991 to 4.1% in 2023 in Hainan Island. Results from three national surveys on human parasitic diseases and provincial disease surveillance programmes showed a higher prevalence rate of soil-transmitted nematode infections in central mountainous regions than in other regions, a higher prevalence rate among women than among men, a higher prevalence rate among children at ages of 5 to 9 years, adolescents at ages of 10 to 14 years and the elderly at ages of 60 to 69 years and 70 years and greater than among resident at other age groups, and a higher prevalence rate among farmers, students and preschool children than among humans with other occupations. There are three stages of soil-transmitted nematodiasis control programmes in Hainan Island, including small-scale mass examinations and treatment, large-scale mass prevention and treatment, and prevention and treatment of high-risk populations, and the major control measures included large-scale surveys on parasitic infections, mass drug administration, improvements in water and sanitation, health education, and pilot construction of demonstration areas. Currently, the prevalence of soil-transmitted nematode infections is low in Hainan Island; however, sustainable control programmes are required to achieve transmission control and interruption of soil-transmitted nematodiasis. Future multiple control efforts are recommended, including expansion of surveillance regions, to achieve precision control of soil-transmitted nematodiasis.

Key words: Soil-transmitted nematodiasis, Epidemiological characteristic, Control progress, Hainan Island

CLC Number:

R532.1

XU Guangda, ZENG Wen, HUANG Xiaomin, LI Yuchun. Changes in the epidemiological characteristics and control progress of soil-transmitted nematodiasis in Hainan Island[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2025, 43(2): 252-259.

Figures/Tables 2

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