In patients being tested for coeliac disease using antibody tests, how long do they need to be on a gluten diet and what do they need to eat to ensure a valid test result?
The CREST guideline on diagnosing and managing coeliac disease states:"TGA and EmA can be used not only for diagnosis but also for monitoring of dietary compliance:seroconversion occurs rapidly with strict gluten exclusion. Conversely, if serology is to be meaningful in the diagnosis of coeliac disease patients must be taking a gluten containing diet for at least 3 months. (Source: NLH Question Answering Service)
http://www.clinicalanswers.nhs.uk/index.cfm?question=5435
