742 



INDEX OF SUBJECTS 



Cultures, incubation of. See under In- 

 cubation of cultures 



Cytase, 279 



Cytoryctes variolae, 658 



Cytotoxins, 201 » 

 specific, injury to organs by, 201 



Dark-field condenser, 597 



Decay, action of, 44 



Defensive factors of animal organism, 



189 

 Degenerative forms of bacteria, 20 

 Denitrifying bacteria, 52 

 activities of, 53 

 occurrence of, 53 

 Destruction of bacteria, 62 



by chemical agents, 73. See also Dis- 

 infectants 

 gaseous, 88 

 in solution, 73 

 inorganic, 73 

 organic, 77 

 by physical agents, 62 

 drying, 62 

 electricity, 65 

 heat, 65 

 Ught, 63 

 Diarrheal diseases traced to milk, 705 

 Diastase. See Amylase 

 Differential stains in staining of bac- 

 teria, 102 . ', 

 Diphtheria, tracing of, to milk, 705 

 Diphtheria antitoxin, 216 

 anaphylaxis in injections of, 296 

 normal, 205 

 production of, 216 

 horses used in, 216-17 

 technique of, 217 

 toxin for, 216 

 stable, 206 

 standardization of, 218 



concentration and purifying in, 219 

 technique of, 218 

 unit for, 205 

 Diphtheria baciUus, 512 

 bacUU similar to, 522 

 Bacillus Hoffmanni, 522 

 cultivation of, 524 



Diphtheria bacillus, bacilli similar to, 

 Bacillus Hoffmanni, mor- 

 phology of, 523 

 staining of, 523 

 Bacillus xerosis, 525 

 cultivation of, 526 

 differentiation of, from other ba- 

 cilli, 626 

 other bacilli, 627 

 biological characteristics of, 616 

 cultivation of, 616 

 degenerative forms of, 19 

 differentiation of, from other forms, 



107, 522, et seq. 

 grouping of, 516 

 isolation of, 517 

 morphology of, 513 



"ground" type in, 614 

 occurrence of, in body, 518, 519 

 pathogenicity of, 518 

 in animals, 619 

 "pseudo-membranes" in, 518 

 resistance of, 516 

 staining of, 574 

 Gram's method of, 607 

 polar or Babes-Ernst bodies in, 514 

 Neisser's stain for, 514 

 Roux's stain for, 515 

 toxin of, 520. See also Diphtheria 

 toxin 

 chemical and physical properties 



of, 520 

 production of, 520 

 media employed in, 620 

 Park-Williams Bacillus No. 8 in, 

 520 

 resistance of, 522 

 Diphtheria toxin, analysis of (EhrUch), 

 206-16 

 method of partial absorption in, 209 

 side-chain theory of, 212 

 summary of, 216 

 constitution of (EhrUch), 210 

 graphic form of (EhrUch), 211 

 views of Arrhenius and Madsen on, 

 212 

 epitoxoid in, 208 

 molecule of, haptophore. group in, 207 



