Epidemiological analysis on 299 cases of clonorchiasis sinensis in Guigang, Guangxi

Abstract

Objective To investigate the epidemiological features of the cases with clonorchiasis sinensis in Guigang City,Guangxi Province and provide a reference for controlling the disease.Methods About 30-50 g fecal samples were collected from each patient and examined by sedimentation technique.Definitive diagnosis of sinensis infection would be made once the Clonorchis sinensis eggs were detected.Number of eggs was counted by Stoll's method and the infectiosity was determined based on the number of eggs per gram of (EPG).Results Among the 299 cases of Clonorchis sinensis,59 cases showed medium or heavy intensity of infection,144 cases showed moderate and 96 cases showed mild.The age of the patients was from 7 to 80 years old.79.93％ (239/299) of them were in the age group of from 30 to 59 years old.93.98％(281/299) of the case were male,30.10％ (90/299) were self-employed.81.61％ (244/299) of the cases were Han nationality 64.88％ (194/299) of the cases lived in the Downtown,and 35.12％ ( 105/299 ) in the rural The cases distributed in 60％ of all townships. 148 cases had clinical complications (49.50％ ).94.65％ (283/299) of the cases had a habit of eating raw fish.The duration from eating raw fish to definitive diagnosis of clonorchiasis was from 20 days to 70 years.Conclusion Most of the sinensis cases were males and there were more cases in urban area than that in rural area of Guigang City. Key words: Clonorchis sinensis ; Clinic ; Epidemiology ;