IFNG and hypersensitivity pneumonitis: Schuyler et al. [70] used Th1 and Th2 cell lines from lung-associated lymph nodes of S. rectivirgula-sensitized mice to show that only Th1 cells could adoptively transfer HP to recipients, and the ability to induce HP was associated with the amount of IFN-γ released by antigen-stimulated cells.