Abstract: Objective To analyze the current situation of infected parasites in outpatients in Shenzhen by using the disease control detection platform to detect the serum antibodies of parasitic suspected cases, which provides a scientific basis for hospitals to formulate strategies for the prevention and control of parasitic infection. Methods Using the enzyme-linked immunosorbent assay (ELISA) to diagnose the common parasitic diseases of 2157 blood samples that sent by the municipal and district hospitals in 2017—2019, they were carried out the serum antibodies for 9 kinds of common parasitic diseases such as clonorchis sinensis, ascarid, paragonimiasis, cysticercus, angiostrongylus cantonensis, schistosomiasis, hydatid, trichinella spiralis, sparganum, and their infection characteristics were analyzed by descriptive epidemiological methods. Results The total positive rate of serum antibodies of 9 parasites in 1290 suspected cases from municipal and district hospitals was 26.38% (569/2157), the positive rates of serum antibodies of clonorchis sinensis, ascarid, paragonimiasis, cysticercus, angiostrongylus cantonensis, schistosomiasis, hydatid, trichinella spiralis, sparganum were 7.97%(155/1946)、8.78%(169/1924)、2.73%(56/2048)、7.19%(148/2058)、4.54%(93/2049)、2.47%(48/1943)、2.67%(55/2059)、2.18%(44/2022)、5.49%(113/2058) respectively, among which the ascarid, clonorchis sinensis and cysticercus have the highest infection rates. And the positive rates of blood samples in the municipal and district hospitals were 23.18%(452/1950) and 56.52%（117/207） respectively, the difference was statistically significant (P<0.05); otherwise ,the male seroprevalence rate was 27.49%（361/1313）, which was higher than the female seroprevalence rate of 24.64% (208/844), The difference was no statistically significant ( P>0.05); Moreover, different age groups in suspected cases showed different seroprevalence rates. The highest seroprevalence rate was distributed in the age group of 21-50 years (27.61%), higher than 0-20 years and older than 51 years old. There was significant difference in seroprevalence among them. Conclusions The parasitic infection rate of outpatients in Shenzhen is relatively high, in which clonorchiasis is the main form of freshwater food borne parasitic diseases, Ascaris is the main form of intestinal parasitic diseases, and most of them are men aged 21-50 years. Therefore, it is necessary to strengthen the prevention and control publicity and monitoring management, further study the regional distribution characteristics of parasitic diseases, and focus on prevention and control.

Key words: Parasitic, Suspected case, Antibody positive rate, Analyse