261 TRACHOMA TABLE 7-11. DISTRIBUTION OF TRACHOMA BY TERRAIN (NBS 1981) Age-Sex- Standardized Trachoma Prevalence per 100 Percentage of All Trachoma in Nepal Estimated with Trachoma Sample N Prevalence per 100 Terrain 473,122 341,138 95,574 909,834 6.5 5.9 7.3 6.5 52.0% 37.5 10.5 100.0 Terai Hills Mountains Subtotal Missing trachoma status 18,355 16,361 4,914 39,630 7.3 5.8 5.5 6.5 257 6.5 100.0 Total 39,887 909,834 6.5 Source: FR7.006.3.l AN.l cases) though they have prevalence rates that range from 3.5 to 10.3 cases per 100, because the population sizes of each region dif- fer. However, within the two most remote regions of Nepal, the Far West regions, there are 560,782 trachoma cases, nearly five- eighths (61.7%) cf the trachoma in the kingdom. TABLE 7-12. DISTRIBUTION OF TRACHOMA BY REGION (NBS 1981) Age-Sex- Standardized Prevalence per 100 Percentage of All Trachoma in Nepal Estimated with Trachoma Sample N Prevalence per 100 Region Eastern Central Western Far West A Far West B Subtotal Missing trachoma status 9,849 12,435 7,576 5,621 4,149 39,630 38,916 163,312 146,814 410,830 149,962 909,834 1.1 3.5 5.6 21.3 10.3 6.5 1.1 3.5 5.5 21.4 10.3 6.5 4.3% 17.9 16.1 45.2 16.5 100.0 257 100.0 Total 39,887 909,834 6.5 6.5 Source: FR7.001.1 AN.2 A more detailed picture of the geographic distribution of is trachoma is shown in Table 7-13 where the distribution by zone