Amounts of IFN-γ in mice vaccinated with MOMP, were statistically significantly lower than in animals immunized with Pgp3 (1184.8) or PmpG (836.2) only, or with the MOMP+Pgp3 (719.8) combination, indicative that in these three groups the infection was still active (p < 0.05). The gene discussed is IFNG; the disease is infection.