Figure 1. IFN-γ responses to a panel of polyketide synthase domains in 5 day diluted whole blood culture supernatants of M. ulcerans disease patients, healthy contacts and healthy non-endemic controls.

A cut off of 37 pg/ml of IFN-γ was used to define responder status. Each bar represent percentage (%) of responders of a participant group to a specific PKS domain antigen.