572 



INDEX 



Weil's Disease, see Infectious jaun- 

 dice. 



WEINBERG, M., 204. 



WEINLAND, D. F., 7. 



WENYON, C. M., 85, 118, 121, 123, 

 124, 125, 156, 172, 173, 471. 



Western Australia, compulsory noti- 

 fication of syphilis, 60. 



West Indies, dengue, 182; Schisto- 

 soma mansoni, 217; hookworm 

 disease, 264; Necator americanus, 

 255; work of Hookworm Com- 

 mission, 268; Filaria perstans, 

 308; bete rouge, 335; Cimex 

 hemipterus, 373; chigger, 419, 

 origin of yellow fever, 447; 

 home of "millions," 461. 



West Point, syphilis at, 51. 



Whipworm, see Trichuris trichiura. 



WHITMARSH, P. L., 305. 



WILDER, R. M., 8, 397. 



Wild game, extermination to eradi- 

 cate sleeping sickness, 107; and 

 control of spotted fever in Uni- 

 ted States, 189; hosts of Der- 

 macentor venustus, 363; hosts 

 of tsetse flies, 490, 498. 



WILLIAMS, ANNA, 143, 193. 



Wohlfartia magnified, 521-522. 



WOLBACH, S. B., 188. 



Woodrats, host of Triatoma pro- 

 tracta, 112. 



Woodtick, see Dermacentor. 



WORCESTER, D. C., 320. 



Worms, 196-205; classification, 196; 

 flatworms in general, 196-198; 

 roundworms in general, 198-199; 

 annelids in general, 199-200; 

 parasitic habitats, 200; life 

 history and modes of infection, 

 200-201; effects of parasitism, 

 201-204; nutriment absorbed, 

 202; toxic effects, 202; infection 

 of wounds made by, 204; rela- 

 tion to appendicitis, 204; diag- 

 nosis, 204-206; eggs of, 205. 



See also Intestinal worms and 



various species. 

 Wrigglers, 431. 

 WRIGHT, R. E., 306. 

 Wyeomyia smithii, hibernation, 436. 

 Xanthium macrocarpum, mites on 



leaves of, 341. 

 Xenopsylla cheopis, identification, 



408; and plague, 411, 412; 



intermediate host of Hymeno 



lepis, 414; distinguished fron 



Pulex irritans, 415; habits, etc. 



417. 

 X-ray, for ulcerating granuloma, 73D 



YAKIMOFF, W. L., 377. 



Yaws, 63-65; distribution, 63; spire 



chaetes of, 63; course of, 6.' 



treatment, 64-65; prevention 



65. 

 Yellow fever, 69-72; in Panama, 2 



relation of mosquitoes to, 7, 44o 



parasite of, 70, 169; distribu 



tion, 69-70; course of, 71; 



treatment and prevention, 71- 



72; transmitting mosquito, 



443-448. 

 Yellow fever group of parasites, 169, 



182. 

 Yellow fever mosquito, see Aedes 



calopus. 



YERSIN, A., 411. 

 Yokagawa yokagawa (Metagonimus), 



intermediate host, 226; 228. 

 YORKE, W., 100, 494, 496. 

 YOSHIDA, S., 222, 223. 

 Yquitos, reduction of yellow fever, 



72. 

 Yucatan, yellow fever in, 70. 



Zambezi, danger of spread of Glos- 



sina palpalis to, 498. 

 Zebu, possible intermediate host of 



Tcenia africana, 245. 

 ZENKER, F. A. VON, 7. 



