Chicken IgY does not fix mammalian complement component C1 and it does not perform as a precipitating antibody using standard solutions.
2.
The antibody that fails to react is known as the blocking antibody and prevents the precipitating antibody from binding to the antigens.
3.
This is evidence that the podiatrist is heavily exposed to " trichophyton rubrum " as observed in increased precipitating antibodies compared to the general population.