406 



GENERAL INDEX 



Cevitamic acid, effect on streptomycin, 



241 

 Chaetomin, 74, 133, 153, 171, 213, 



329 



Cheese as a source of antagonistic organ- 

 isms, 92 

 Chemical composition of soils, 4—5 

 Chemical nature of antibiotic substances, 

 I 70-2 1 7 

 classification of substances, 170—178 

 substances produced by actinomy- 



cetes, 189-200 

 substances produced by animals, 215- 



216 

 substances produced by bacteria, 



178-189 

 substances produced by fungi, 200— 



214 

 substances produced by higher plants, 



2 1 6-2 1 7 

 substances produced by yeasts, 214- 

 215 

 Chemist, problems for, 321-322 

 Chemotherapy, 266-297, 322-324, 



332 

 Chlorellin, 171, 330 

 Chlororaphin, i 81-182 

 Cholera bacteria 

 as antagonists, 103 

 survival, 28, 34 

 Cholera immune soils, 35 

 Chromogenic bacteria as antagonists, 99 

 Citrinin, 133, 140, 171, 182, 208- 



209, 245, 254, 298, 320, 329 

 chemical nature, 171, 177 

 crystals, Fig. 20 (p. 209) 

 structural formula, 182 

 toxicity, 178, 298 



Citrus canker, 305 



Clavacin, 83, 133, 140, 169, 171, 182, 



210, 219, 242-243, 298, 299, 

 303, 319, 320, 329 



antiluminescent activity, 82 

 bactericidal action, 243 

 bacteriostatic spectrum, 220 

 chemical nature, 171, 1 77 

 compared with other antibiotics, 74, 



219-221 

 effect on bacteria, 74, 210, 223, 242, 



243 



Clavacin (coni.) 



effect on fungi, 242 



effect on virus, 165 



production, 144, 210 



structural formula, 182 



therapeutic value, 280 



toxicity, 178, 280, 298 

 Clavatin, See Clavacin 

 Claviformin, See Clavacin 

 Clitocybin, 146, 172, 330 

 Clover-sick soils, 1 8 

 Coagulase, 225 

 Cocci, 259 



as antagonists, 103— 1 04 

 Coccidiosis organism, survival in soil, 17 

 Colds 



treatment with clavacin, 280 



treatment with penicillin, 275 

 Colicines, 102, 172, 329 

 Coliform bacteria in soil, 10, 29 

 Colistatin, 94, 172, 329 

 Collodion sac method of testing antago- 

 nistic action, 60— 61 

 Colon index, 96 

 Colon-typhoid bacteria, 245 



as antagonists, 99— 103 



in manure, 21 



in soil, 30-32 

 Competition among microorganisms, 



44-45, 

 Corylophillin. See Penatin 

 Cotton root rot, control of, 312 

 Crepin, 330 



Crowded plate method, 56-57 

 Cultivation of antagonistic microorgan- 

 isms, methods, 64-69 

 Cup method, 63, 75-78 

 Cylinder method, 63, 75-78 

 Cysteine, effect on streptomycin, 241 

 Cytolytic bacteria, 91 



Damping-off disease, 27, 94, 309, 312 

 Definitions of terms, 331—332 

 Dehydrogenases, 81, 248-249, 253 

 Dermatophytes, 146 

 Differentiation of bacteria by means of 



antibiotic substances, 259—260 

 Dilution method, 73-74, 84 

 Diphtheria, 48, 88, 90, 91, 259 

 survival of organism, 28 



