GENERAL INDEX 



415 



90, 



295, 



Typhoid organism, 85-86, 87, 8i 

 93, lOi, 242 

 as antagonist, 103 

 in soil, 28, 30-32, 85-86 

 treatment of, 264, 265, 294, 

 296 

 Typhus rickettsiae, 166, 273 

 Tyrocidine, 70, 92, 170, 175, 298, 



329 . 



bactericidal action, 282 



chemical nature, 175, 178, 186-187 



compared with gramicidin, 221- 



222, 230 

 compared with penicillin, 239 

 crystals, Fig. 20 (p. 209) 

 effect on bacteria, 70, 225, 232 

 effect on protozoa, 158 

 hemolytic effect, 231 

 mode of action, 221, 230—233, 

 therapeutic value, 231 

 toxicity, 178, 298 

 Tyrothricin, 65, 81, 88, 92, 153, 



175, 242, 266, 298, 316, 



320,329 

 adaptation of bacteria to, 232 

 administration, 282 

 antiluminescent activity, 82 

 bactericidal action, 281, 282 

 chemical nature, 175 

 differentiation of bacteria by, 260 

 effect on bacteria, 82, 219, 230 

 hemolytic effect, 231, 299 

 inhibition, 230, 256 

 limitation, 286 



mode of action, 229-233, 254 

 production, 71, 92 

 therapeutic value, 272-273, 280- 



286 



254 



163, 

 3i9> 



Tyrothricin (coni.) 



toxicity, 178, 230, 282, 284 



Udder infections. See Bovine mastitis 

 Ultramicroscopic forms in soil, 6 

 Urinary infections, 275, 294, 295, 296 

 Urine, bacterial composition of, 21 

 Ustin, 142, 175, 329 

 Utilization of antibiotic substances. See 

 Disease control 



Vaccination of medium, 47 

 Violacein, 175, 182, 329 

 Viridin, 145, 175, 212, 321, 329 

 Viruses 



antagonisms among, 163-169 



inactivators of, 164—166 

 Vitamins, 1 1, 42 

 Vivicillin, 279 



Wastes, human and animal. See Human 

 and animal wastes 



Water 



as culture medium, 10— II 



as habitat of microorganisms, 1—2 



Wonder drug, 316 



Worms, 9 



Wound infections, 316—317 

 treatment, 275, 278 



Yeasts, 45 



in soil, 9 



substances produced by, 2 1 4-2 1 5, 

 253> 255, 321 



utilization, 68, 265-266 

 Yellow fever virus, 167 



