INDEX OF SUBJECTS 



753 



Nitrogen in nutrition of bacteria, 



sources of supply of, 28 

 Noguchi's modification of Wassermann 



test for syphilis, 270 

 Novy jar, 154 



Nucleus in bacterial cell, 10 

 Nutrient media. See Culture media 

 Nutrition of bacteria, 25 



carbon in, 25 



hydrogen in, 28 



nitrogen in, 25 



oxygen in, 25 



salts in, 29 



Obermeier, discovery of spirochaetes 



of relapsing fever by, 605 

 Obligatory aerobes, 25 

 Obligatory anaerobes, 26 

 Oidium albicans, 640 

 discovery of, 640 

 morphology of, 640 

 varieties of, 640 

 "Old tuberculin" (Koch), 491 

 Opium production, bacteria in, 716 

 "Opsonic coefficent of extinction," 286 

 Opsonic index, finding of, 286 

 Opsonic test, Wright's, 284 



obtaining of bacterial emulsion for, 

 284 

 of blood serum for, 284 

 of leucocytes for, 284 

 opsonic index in, finding of, 286 

 parallel control test on normal 

 serum in, 285 

 "pool" in, 285 

 technique of, 284 

 Simon, Lamar, and Bispham's tech- 

 nique of, 286 

 dilutions in, 286 



opsonic coefficient of extinction in, 

 286 

 Opsonins, 281 

 decrease of phagocytic power upon 

 introduction of bacteria without, 

 282 

 definition of, 282 



increase of phagocytic power upon in- 

 troduction of, 283 



Opsonins, Neufeld and Rimpau's dis- 

 covery of, 282 

 normal and immune, 282-3 

 specificity of, 282 

 structure of, according to Hektoen and 



Ruediger, 283 

 Wright's test of. See Opsonic test 

 Wright's theory of, 282 

 Orthocresol as disinfectant, 78 

 Osmotic properties of bacterial cell, 23 

 Oxydases, 50 



Oxygen as disinfectant, 88 

 in development of bacteria, 25 

 free, 26 



absence of, 26 

 indirect supply of, 26 

 in nutrition of bacteria, 25 

 Ozone as disinfectant, 88 



Paltatjp's modification of Gram's stain, 



103 

 Pancreascytotoxin, 201 

 Paper used in filtering ' culture media, 



121 

 Paracolon bacillus, 430 

 Paracresol as a disinfectant, 78 

 Parasites, bacterial, 29 

 facultative, 30 

 media for growth of, 29 

 definition of, 182 

 infectiousness of, 182 

 pathogenicity of, 182 

 Paratyphoid bacilli, differentiation of, 

 on sugar, 433 

 types A and B, 431 

 Paratyphoid fever, differentiation of, 



from typhoid, 432 



Passive immunity. See under Immunity 



Passive immunization, definition of, 196 



Pasteur, discovery of bacillus of chicken 



cholera by, 552 



discovery of bacillus of maUgnant 



edema by, 468 

 discovery of Diplococcus pneumoniae 



by, 353 

 technique of, in rabies therapy, 652 

 Pasteurization of milk, 709 

 Pathogenic bacteria, 182, 321 



