SUBJECT INDEX 



315 



Incubation period, 41, 47- 



for body temperature count, 

 64. 



Incubator, necessity for moisture 

 in, 46. 



Indol test, 176. 



Infusoria, destruction of bacteria 



by, 15- 

 Interpretation of results, 51. 

 Intestinal bacilli, 103, 201. 

 Isolation of B. coli, 104, 132. 



by bile media, 122. 

 Isolation of cholera spirillima, 97. 

 Isolation of streptococci, 203, 



Lactose bile, 81, 122, 126. 

 action of bacteria on, 102. 

 advantage of, 127. 

 comparison with dextrose broth, 



125. 

 decomposition of, 64. 

 preparation of, 269. 

 Lactose fermentation, 114. 



importance of, 115. 

 Lactose fermenting bacilli, 102. 



effect of storage on, 115. 

 " Lamirasacsal," streptococci, 210. 

 " Larasacsal " streptococci, 210. 

 Light, destructive effect on bac- 

 teria, 16, 17. 

 Litmus lactose agar, 64, 104. 



coimts, 65. 



incubation of, 132. 



preparation of, 272. 

 Liver agar, preparation of, 274. 

 Liver broth, 131. 



preparation of, 273. 

 Liver gelatin, preparation of, 274. 



Malachite green agar, 77. 

 McConkey's group in filtered 

 water, 198. 



McConkey's groups in raw waters, 



198. 

 McConkey's groups in stored 



waters, 198. 

 Mechanical filtradon, 57. 

 Methods of estimation, 48. 

 Middletown outbreak, 245. 

 Milk, preparation of, 278. 

 Mussels, 244. 

 Mutations in B. coli, 183. 



Nahrstoff-agar ratio, 31. 

 Nahrstoff -gelatin ratio, 31. 

 Nahrstoff-Heyden agar, 29. 

 Neutral red, 122. 

 Neutral red reaction, 121. 

 Neutral red test, 178. 

 Nitrate broth, preparation of, 287. 

 Nitrates, 3. 

 Nitrite test, 177. 

 Nitrogen cycle, 4. 

 Nitroso-indol reaction, 97. 

 Nutrient broth, preparation of, 



268. 

 Nutrose, 76. 



Obligate parasites, 29. 

 Overgrowth, effect of, 119. 

 Oysters, 244. 



B. coli in, 259. 



bacterial coimts of, 258. 



bacteriological examination of, 



257- 



opened, examination of, 262. 

 rating for B. coli, 260. 

 sampling, 257. 

 Ojreters and typhoid, 246. 



Para-colon bacilli, 187. 

 Para-typhoid bacilli, 94. 



