IXDKX 



Nitrogen, non-symbiotic, 70 



symbiotic. 71 

 Nitroso-bacteria, 69 

 Nitrosomonas europea, 69 



javensis, 69 

 Xocardia t'arcinic'a, 378 



genus, 77, 80, 372 

 Xodules in tuberculosis, 316 



on roots of legumes, 71 

 Non-specific pyogenic bacillus group, 



iss. 22s 



coccus group, 188, 190 

 Normal solutions, 89 

 Noxious retention theory of immunity, 



126 

 Nucleus molds, 41 



protozoa. 44 



yeasts. :>'. 



Nutrient broth, cultures in, 111 

 Nutrients required by bacteria, 90 



malin, 359 

 Oidium, 393, 408 



albicans, 410 



coccidioides, 389 



dermatitidis, 386 



porrigenis, 409 



type of spore, 42, 43 

 ( )il globules, 34 



immersion, objective, 100 



optics of, 100 

 Omphalophlebitis, 201 

 or.cyte, 469 

 Ookinete, 464 

 Oospora, 393, 408 



porrigenis, 409 



Ophthalmo-tubereulin reaction, 323 

 ( )pilacao, 437 

 Opsonic index, 169 



materials needed, 169, 170 

 McCampbell's modification, 171 

 method, 171 

 Opsonins, 128, 166 



immune, 168 



normal, 168 



occurrence, 167 



Optimum growth temperature, 48 

 Organella, 44, 412 

 Oriental sore, 439 



Ornithodorus moubata, 446, 448 

 Osmotic pressure, adjustment of or- 

 ganisms to, 55 



Ovine caseous lymphadenitis 2:;^ 

 Ovopla.sm nrit-ntale, 439 

 Oxidase, 59 

 Oxidation by bacteria of ammonia, tin 



of hydrogen sulphid, <>7 



of iron, 68 



of nitrites, 69 

 Oxy tuberculin, 319 



PARACOLON bacillus, 274 

 Parat'ormaldehyd, 54 

 Paraphyses, 43 

 Parasites, 46 

 Paratrophic bacteria, 46 

 Paratubercular dysentery of cattle, 



326 



Paratyphoid, 274 



Parenteral injection of organisms, 176 

 Passive anaphylaxis, 178 



immunity, 122, 124 

 Pasteurella, 293 

 Pasteurellosis, 293 



of birds, 294, 295 



of cattle, 294, 302 



of horses, 294, 303 



of man, 295, 303 



of rabbits, 294, 303 



of rodents, 295, 303 



of swine, 294, 298 

 Pasteur method of vaccination against 



hydrophobia, 490 



Pasteurization of milk and Strepto- 

 coccus lacticus, 205 

 Pathogenic organism, definition, 119 

 Pearl disease, 316 

 Pediculus vestimenti, 446 

 Penicillium, 393, 399 



glaucum, 401 



spore production, 43 

 Pepsin, 59 

 Peptonization, 65 

 Period of incubation, 130 

 Peripneumonia, 478 

 Perithechim, 395 

 J Peritonitis, 201 

 Perlsuche, 316 



