410 



GENERAL INDEX 



Methods of isolating antagonistic mi- 

 croorganisms (cont.) 

 "forced antagonism," 53, 58, 214 

 soil enrichment, 54-55 

 Methods of measuring antibiotic ac- 

 tivity, 69-83 

 agar diffusion or "agar cup," 78 

 agar streak-dilution, 72—73 

 antiluminescent test, 82 

 lysis of red blood cells, 84 

 serial dilution, 73—75 

 turbidimetric, 78-81 

 Methods of measuring bactericidal ac- 

 tion, 82-83 

 Methods of testing antagonistic action 



of microorganisms, 59-69 

 Methods of testing in vivo activity of 



antibiotic substances, 83—84 

 Microbial cell, physiology of, 325 

 Microbiological equilibrium, 156 

 Microbiological population, 3-4 

 Microbiologist, problems for, 318—321 

 Micrococci as antagonists, 104 

 Micromonosporin, 119, 329 

 Microorganisms 



disease-producing, i 3—1 5 

 in animal excreta, 20—23, 85—87 

 in soil, 1-2, 6-9, 3 1 > 3 2, 3 3-3 5 

 nutrition of, 1 1— 12 

 See also Actinomycetes ; Animals, 

 microscropic; Antagonistic micro- 

 organisms; Bacteria; Fungi; 

 Mixed cultures 

 Microscopic methods of determining 

 abundance of microorganisms in 

 soil, 7 

 Milk, bactericidal action of, 216 

 Milky disease of larvae, 94, 160 

 Mixed culture inoculation for testing 



antagonistic action, 63 

 Mixed cultures, 86, 104 



antagonistic interrelationships, 45- 



49 _ ^ 



associative interrelationships, 41—44 

 competitive interrelationships, 44-45 

 growth of microbial cells, 12—13, 40 

 mutualistic relationships, 36-39, 41- 



42 

 nature, 40-41 

 Mixed infections, 263-264 



Mixed population. See Mixed cultures 

 Mode of action of antibiotic sub- 

 stances, 70, 218, 228, 324- 



325 

 Morphology, 103, 223, 250-253 

 Much-lysin, 90 

 Mushroom fungi, 9 

 Mutaflor, 266 



Mutants of P. notatum, 136, I 39 

 Mutations of bacteria, 259 

 Mutualistic relationships among micro- 

 organisms, 36-41 

 Mycetin, 119, 126, 173, 329 

 Mycobacteria and streptomycin, 288, 

 289-291, 296 

 in soil, 17 



inhibition by streptomycin and strep- 

 tothricin, 288 

 Mycocidal, defined, 332 

 Mycoin, defined, 332 

 Mycolysate, 53, 113, 129, 265 

 Mycophagy, I 30 



Mycophenolic acid, 130, 173, 213, 259 

 Mycorrhlzal fungi, 303 

 Mytogenetic rays, 51 



Natural selection of bacteria, 259 



Nematodes, 158, 159, 160, 162 



Neocolysin, 265 



Nitrite production method for measur- 

 ing activity of penicillin, 81 



Nitrogenous materials, effect on fungi, 

 307-308 



Nonspore-forming bacteria, 95-104 



Notalysin, 173 



Notatin. See Penatin 



Nutrition of microorganisms, 11-12, 

 223 



Organic matter of soil, 4 

 Organic media, 64 

 Otitis media, 295, 296 

 Oxford unit, 77, 204, 332 

 Oxygen supply of soil, 3 

 Oxyphenazine, 179, 287 



Pantoyltaurine, 226 

 Paper-disc method, 63, 75-78 

 Paper-pulp fungi, 150, 310 



