<Table> <Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2010) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2010) (Learn how and when to remove this template message) </Td> </Tr> <P> Typhidot is a medical test consisting of a dot ELISA kit that detects IgM and IgG antibodies against the outer membrane protein (OMP) of the Salmonella typhi . The typhidot test becomes positive within 2--3 days of infection and separately identifies IgM and IgG antibodies . The test is based on the presence of specific IgM and IgG antibodies to a specific 50 Kd OMP antigen, which is impregnated on nitrocellulose strips . IgM shows recent infection whereas IgG signifies remote infection . The most important limitation of this test is that it is not quantitative and result is only positive or negative . Whereas a detailed Widal test can tell the titres of specific antibodies . However both tests lack sensitivity and specificity . The Widal test is losing its value as it is labor - intensive and time-consuming.It is an immunochromatographic test . </P> <Table> <Tr> <Td> </Td> <Td> This medical diagnostic article is a stub . You can help Wikipedia by expanding it . <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table>

What is the difference between widal test and typhidot test