Research Leal-Herrera et al in Mexico had 75% reinfection, The study of Gisselle Soto et al in Peru had a reinfection rate of 79%. High reinfection rates are associated with re-exposure to sources of 22 infection from H pylorior H pyloriinfected family members residing in the patient's own oral cavity as the source of reinfection and the source of H pyloriinfected water.