287 TRACHOMA TABLE 7-36. DISTRIBUTION OF HIGH-INTENSITY TRACHOMA BY AGE AND SEX (NBS 1981) Estimated Population Affected Estimated Prevalence per 100 Percentage of All Affected in Nepal Sample N Males 0-4 5-9 10-14 15-29 30-49 50+ Females 0-4 5-9 10-14 15-29 30-49 50+ Subtotal Missing trachoma intensity 19,176 2,788 3,125 2,659 4,325 3,807 2,472 55,517 28,872 11,864 3,672 3,487 3,997 3,625 0.8 3.0 1.1 0.4 0.2 0.2 0.4 43.8% 22.8 9.4 2.9 2.7 3.2 2.8 19,185 2,744 3,035 2,285 4,937 4,320 2,494 38,991 896 71,062 27,789 18,180 6,271 8,817 4,580 5,425 126,579 1.0 3.0 1.8 0.8 0.5 0.3 0.6 0.9 56.2 22.0 14.4 4.9 7.0 3.6 4.3 100.0 Total 39,887 126,579 0.9 100.0 Source: FR7.010.1 AN.6 REP.V3004.1 castes are older and not affected by high-intensity trachoma). Among the five ethnic groups, the Tharu and Magar have prev- alence rates of 4.5 and 3.4 high-intensity trachoma cases per 100 persons, respectively. These rates are four to five times higher than the overall national prevalence rates, and they are not unexpected given. the distributions observed previously for trachoma, trichiasis and entropion, and trachoma blindness. In summary, high-intensity trachoma affects about one in eight trachoma cases in Nepal, occurring more frequently among younger age groups (i.e., ages 0-9) than older age groups. Females, especially after age 5, tend to have more high-intensity trachoma than males. As observed for trachoma, for trichiasis and entropion, and for trachoma blindness, high-intensity trachoma is more prevalent in the Far West region. Bheri and Seti zones alone contain two- thirds of all high intensity trachoma and three-fourths of high- intensity trachoma is also associated with the Vaishya caste and the Tharu and Magar ethnic groups.
