bd adds —— = em ee ee eet mee mle eee Stee ee Ee ee See ee ne U.S.ARMED FORCES MEDICAL JOURNAL ~* a ' ~~ used on the remainderof the population, it was reported that there was no significant variance between the numberof positive reactors to the two dosages. The Andings for the Yap Islands presented in this article are all based on dosages of 0.00002 mg PPD tuberculin. In 6 of the 10 districts of Yap, however, all natives with negative reactions to these first. tests were civen a second test of 0.005 mg PPDtuberculin. Out of 304 tests there were 251 positive reactions. In other words, of the Negative reactors to 0.00002 mg PPD test-strength tuberculin, who were retested with 0.005 me PPD test-strength tuberculin, approximately &3 percent reacted positively. The practice of employing seconcl test-strength dosages of tuberculin was discontinued. It was found that most individuals reacted to the second dose and the reactions were regularly so severe that they were alarming the natives. Of the tubercilin-tested population 46.4 percent were positive reactors. The Marshall] Islands district liad much the lowest percent positive, 19.2 percent as compared with 34.6 percent for the Saipan district and 6U.0 percent for the Palau district. There is wide variation among islands in the proportion of postive reactors (table 17), The widest range oceurs in the Palau district, # Table 17.) Pereentaze of positive tuberculin tests by rank order, selected istunas or atolls ; Island or atoll and Percent i district positive i Island o7 atoll and Yap Islands* 8.5 !© Lib Island-* Tobi [sland* 64 i Aur Island*** . Fais [stund* 70.0 61s 626 624 Saipan Island** S440 0; Pulo Anta Uland* 565 | Satawal Isand* TOT Wolead Atoll =| } Ualik Atoll" fo Ine Tsland*** Faraulep Atoll* 9) Kwajatera aroiless “SMG Babelthuap island Rota Istand** Tian Island** 2.9 30.0 i Enuripik asoll” «! Mil! Aro 0) Namoris Ifand*** 57.9 Npwu Atol" Eayancel Atul’ Lamotres Atoll" H.0 23.9 27.9 7.5 89.7} Majuro Ault Sonsoro} {stand* Ulithi Atou* positive |) Tabul bstactt*+ Roror Isjand* Merir Istand* Peizliu Islaned* AngaurIstaad* Percent dinrict , 223 20.0 oH Wotje Atate?s 19.2 47.3 a2 L | Malovlap xceutes Gf Alluk atuzers 16.4 13.3 o38S ° Elate ance: S23 fi Mejit Iyuectees j 1 40.200 we | 38400 : | 25, 6 3.1 %.0 ah Utirik Accuses Likiep Amit? Arno [alacdeo* | Ebon Aiwi*** ; 18.0 12.68 10.1 61 4.3 a2 ! *Paluu district. ""Salpan d.strict. *°*SMMarshall T-lands district. 1216 — Cg 3708 VOLUME 10, No. 10