Table 2. Percent of stools tested found positive for various helminth eggs. Positive Trichuris A. Rongelap Atoll, persons = 106) Ascaris Hookworm Negative No. tested Percent of total group tested 1977-1979, Group aged 2-14 years (estimated total 80.2 38.5 1.0 Jan 78 22.7 3.4 Sep Sep 78 79 20.0 68.2 4.6 22.7 Rongelap Atoll, 1977-1979, Group aged >15 years (estimated total 77 62.4 4.4 2.9 Jan 78 8.6 0.0 Sep 78 2.3 12.5 2.3 6.2 Jun 77 Rx (Jun) Rx (Sep) Rx (Jan) persons = 74) Jun Rx (Jun) Rx (Sep) Rx (Jan) Sep 79 15.6 96 90 0.0 88 83 0.0 0.0 65 22 61 21 67 90 0.0 58 78 0.0 0.0 42 16 57 22 34.3 Utirik Atoll, 1978-1979, Group aged 2-14 years (estimated total persons = 136) Mar 78 Rx (Mar) 100 44.9 0 29 21 Sep 78 Rx (Sep) 97.0 23.4 0 1.6 64 46 Sep 96.4 18.8 3.7 3.7 53 39 Rx (Jan) 79 Utirik Atoll, persons = 128) 1978-1979, Group aged >15 years (estimated total Mar 78 83.9 10.8 544 16.2 37 29 Sep 78 88.5 11.5 3.8 7.7 26 20 Sep 79 92.4 15.4 0 7a7 26 20 Rx (Mar) Rx (Sep) Rx (Jan) - 39 -