342 



GENERAL INDEX 



Clavacin (conf.) 



compared with penicillin, strepto- 

 thricin, and actinomycin, 1 90-1 91 

 effect on bacteria, 77, 125, 134, 161, 

 195, 207, 208 

 by species, 190, 191, 192 

 effect on fungi, 141, 249 

 production, 127, 134, 263-264 

 structural formula, 164 

 therapeutic value, 237 

 toxicity, 245 

 Clavatin, 134, 157, 270 

 Claviformin, 125, 130, 134, 157, 183, 



270 

 Clover-sick soils, i 8 

 Cocci as antagonists, 97-99 

 Coccidiosis organism, survival in soil, i 8 

 Colds 



treatment with clavacin, 237 

 treatment with penicillin, 233 

 Collodion sac method of testing antago- 

 nistic action, 62 

 Colon-typhoid bacteria 

 as antagonists, 95-97 

 in manure, 21, 22 

 in soil, 1 1, 32-34 

 Competition among microorganisms, 



45-46 

 Corylophilline, 158 

 Cotton root rot, control of, 254 

 Crowded plate method of isolating an- 

 tagonistic microorganisms, 58 

 Cultivation of antagonistic microorgan- 

 isms, methods, 64-66 

 Cup method of measuring antibiotic ac- 

 tivity, 73-75 

 Cytolytic bacteria, 86 



Damping-off disease, 28, 249, 250, 

 255, 258 



Definitions of terms, 271-272 



Dehydrogenases, 76, 199, 211, 212, 

 216 



Dermatitis, chronic, treatment with 

 penicillin, 233 



Differentiation of bacteria by means 

 of antibiotic substances, 219-220 



Dilution method of measuring anti- 

 biotic activity, 69—73 



Diphtheria 



neutralization of toxin, 223 

 survival of organism, 30 

 treatment of carriers with filtrate of 

 B. meseniericus, 241 

 Diplococcin, 157, 270 

 Direct antagonism, 47, 49 

 Direct microscopic method of determin- 

 ing abundance of microorganisms 

 in soil, 7 

 Direct soil inoculation method of iso- 

 lating antagonistic microorganisms, 

 58-59 

 Disease control, 221-245 



of fecal-borne diseases in China, 27 

 of plant diseases. See under Plants 

 of soil-borne diseases, 14-15, 246- 



toxicity of antibiotic substances, 245 



use of antibiotic substances, 226-245 



use of microbial antagonists, 223- 



226 



Disinfectant spectrum, 193-194 



Disinfectants, chemical, compared with 



antibiotic substances, 189-195 

 Double plate method of testing antago- 

 nistic action, 62, 64 

 Dutch elm disease, 141, 142, 249 

 Dyes as bacteriostatic agents, 165 

 Dysentery bacteria, survival of, 29-30 



E. coli 



and rectal cancer, 97 

 antagonists of, 33-34 

 influence of enrichment of soil with 



organism, 31 

 survival of organism, 31, 32-34 

 E. coli factor, 125, 130, 158, 270 

 Enzyme action, inhibition by tyrothri- 



cin, 199-200 

 Enzymes acting on polysaccharides, 1 60, 



165-167, 197, 216 

 Equilibrium among soil microorgan- 

 isms, 40 

 Eye lesions, treatment with penicillin, 

 233 



Fecal-borne diseases, control of, 27 



