When doing a health certificate anal examination just wiping is not allowed, usually you need to use an anal swab inserted into the anus to take a sample, just wiping the anus will affect the accuracy of the examination. When conducting anal stool tests, it is usually possible to clarify whether there are intestinal parasites or infectious diseases, etc. The main purpose of the anal swab test for a health certificate is to screen, for the presence of bacterial or viral infections or parasitic infections, which can generally be transmitted through fecal-oral transmission, body fluids, or to others through droplet transmission. The people who need the health certificate will generally touch the customers’ food or have direct contact with them, so the anal swab is a necessary test to complete the sampling carefully and not just to perform anal wiping. If the test result shows negative, it indicates that the patient is healthy; if it shows positive, it indicates that the test result is abnormal, which usually indicates that the patient has the corresponding pathology, commonly in the case of intestinal tract with S. typhi infection, S. dysenteriae infection, S. tuberculosis infection, parasitic infection, etc. The presence of the above pathology usually affects the health certificate processing. If a stool test is required for the health certificate, the sample should be adequately retained for specimen collection. At the same time, avoid contaminating the sample during the testing process so as not to affect the test results.