Blood sampling is able to detect the presence of schistosome infection. Currently, the presence of specific antibodies in the serum of patients with schistosomiasis is examined immunologically, and positive specific antibodies are more significant in confirming the diagnosis. At present, there are many methods to detect schistosomiasis antibody, commonly used are cyclic egg precipitation test, indirect erythrocyte agglutination test and enzyme-linked immunosorbent assay. 1. COPT: The specific serological test method with schistosome eggs as antigen. the sensitivity of COPT can reach 85%~97%, false positive reaction is about 3%, and cross-reaction with Schistosoma, Schistosoma oryzae can be seen. This method is easy to operate and is one of the important screening methods for this disease. 2. Indirect erythrocyte agglutination test IHA: the method and the fecal test positive compliance rate of 92. 3% – JOO%, false positive rate of about 2%, and Schistosoma, Schistosoma oryzae, Trichuris trichiura cross-reactivity. IHA is still widely used in China because of its simplicity of operation, small amount of blood used and fast interpretation of results. 3. Enzyme-linked immunosorbent assay (ELISA): This method is easy to operate, has high sensitivity and specificity, and can reflect the antibody level, with a positive detection rate of 95%~100% and a false-positive rate of 2.6%, which can be used as a better method for screening of schistosomiasis patients, seroepidemiological investigations, as well as for monitoring the trend of epidemics. It is important to note that since serum antibodies can remain present for a long time after the patient is cured, the antibody test cannot distinguish between current and previous infections, so if you feel unwell, consult a physician for advice.