Epidemiological investigation on clonorchiasis sinensis in Sanjiang County, Guangxi

Abstract

Objective To understand the epidemic situation of Clonorchis sinensis in Sanjiang County of Guangxi thus to provide a reference for control and prevention of the disease.Methods Tongle Township was chosen as the investigation spot where the residents have the habit of eating raw fish.The stool samples of various minority ethnic residents were collected.The samples were treated by washing precipitation or aldehyde ether then examined under microscopy.The infection rate and infectiosity were calculated.Results There are minorities of Dong,Miao and Yao living in 3 villages with the total population of 3 287 among them 826 samples were collected with the collection rate of 25.13％(826/3 287) and the positive rate was 77.85％(643/826) in the Tongle Township.There were cases of clonorechis found in each age group of men and women while the infection rate in 1-9 year old group was 30.56％(22/72),67.19％(43/64) in 10-19 year old group and up to 80％ in all groups older than 20 years.The infection rates in three minorities were higher between 75.73％-100％ with the average infectiosity of 6 563 eggs/g faeces.Conclusion The Clonorchis sinensis infection is very serious in minorities of eating sashimi in this county. Key words: Clonorchiasis sinensis; The sashimi (sliced fish) ; Infection rate