Investigation of the sources of trachoma in the white school population of Western Australia.

IT is now nearly 6 years since the beginning of the Ophthalmic Surveys of Western Australia. During that time many thousands of school children of all races have been examined and the incidence of trachoma in the general population, white and native together, has been found to be approximately 30 per cent. If persons with aboriginal blood alone are considered, the percentage rises to 58 per cent., that in the total white population being approximately 4 per cent. These figures are derived from the results of the three Western Australian Surveys (Table I).