The Typhidot - IgG and IgM test are done to detect antibodies against Salmonella typhi. This test detects IgG and IgM antibodies against Salmonella typhi. With the help of this test, the presence or absence of Salmonella typhi can be detected. Salmonella typhi is responsible for causing typhoid fever. The Typhidot-IgG and IgM test are done: • As a part of the fever panel • In case of signs or symptoms of typhoid fever