A positive tTG with a negative gliadin can mean a number of things: You got a false positive tTG. (Possibly due to some other autoimmune disorder) You got a false negative gliadin. (This is actually much more likely than with the tTG test. Reported sensitivity of gliadin test is in the 65-75% range, meaning that roughly 1/4-1/3 will be false negative)
Definition of ultra. : going beyond others or beyond due limit : extreme.
Definition of ultra-. 1  1 : beyond in space : on the other side : trans- ultraviolet. 2  2 : beyond the range or limits of : transcending : super- ultramicroscopic. 3  3 : beyond what is ordinary, proper, or moderate : excessively : extremely ultramodern.