SOD1 and infection: The severity of B. melitensis 16 M infection in vaccinated sheep and goats and their fetuses or lambs/yeanlings of the Flu-BA_Omp19-SOD or Flu-BA_Omp19-SOD_TV groups as indicated by the index of infection (Fig 5; 1.1±0.5–2.8±1.0; P <0.