For five consecutive years, active trachoma has been surveyed and treated in the entire population of the San Xavier Papago Indian Reservation on the premise that only such a major effort would be successful in eradication of this disease. Numerous socioenvironmental factors have been evaluated in detail. During that time, rapid improvement in housing and sanitation standards has occurred. The incidence of active trachoma has been substantially reduced in the children and virtually eliminated in the adults as a result of this wide-scale effort. Nevertheless, the total reservation screening approach does not seem to have been warranted.
Portney GL, Portney SB. Five-Year Perspective on Trachoma in the San Xavier Papago Indian. Arch Ophthalmol. 1974;92(3):211–212. doi:10.1001/archopht.1974.01010010219006