INDEX. 



Milk, methods of determining number 



of bacteria in, 149 

 number of bacteria in, 149 

 of lime, 256 



pasteurization, effect of, on patho- 

 genic bacteria in, 154 



definition of, 60 

 pathogenic bacteria in, 151 

 poisoning, 153 

 pus cocci in, 152 

 recommendations of American 



Public Health Association for 



the examination of, 149 

 samples of, 97 



scarlet fever conveyed by, 152 

 sources of contamination of, 151 

 sterilization in infant feeding, 



*53 



tubercle bacilli in, 151, 153 

 Miller's spirillum, 326 

 Milzbrand (see Anthrax) 

 Mixed infection, 183 

 Mixtures of toxin and antitoxin, 223 

 Modes of enrty into the body, 172 

 Moisture in relation to growth of 



bacteria, 126 



Morphology of bacteria, 177 

 Mosquitoes as carriers of infectious 



disease: malaria, 177, 434 

 yellow fever, 440 

 destruction of (with coal oil), 258 



(with sulphur dioxide), 255 

 Motility of bacteria, 124 

 Moulds, aspergillus, mucor, oidium, 



penicillium, 278 

 cultivation, 76 

 description of, 278 

 for class work, 115 

 in air, 137 

 Mouth, B. Friedlander in, 315 



characteristic bacteria in normal, 



161 



leptothrix in, 277 

 M. lanceolatus in, 301, 305 

 spirilla in,. 274 

 Movement, Brownian, 24 

 Mucor mucedo, 279 

 Mucous membranes, bacteria of, 160, 



161 



Multiplication of bacteria, 122 

 Mumps, microorganism of, not known, 



170 



Mustard as a deodorizer, 257 

 Mycelium, 280 

 Mycetoma, 369 



Nasal cavity, bacteria of, normally, 



161 



B. rhino scleroma, 316 

 Natural immunity, 199 

 Necrosis caused by toxin, 189 

 Neisser's gonococcus (see Micrococcus 



gonorrhceae 



stain for diphtheria bacilli, 338 

 Neisser-Wechsberg phenomenon, 233 

 Neutral red in culture-media, 71 



in diagnosis of B.coli, 372, 386, 387 

 Neutralization of culture-media, 65, 66 

 Nitrate of silver as a germicide, 250 

 as a stain for S. obermeieri, 405 

 Nitrifying bacteria in soil, 131 



nutrition of, 126 

 Nitrites, conversion of, into nitric 



acid, 131 

 Nitrogen fixation by bacteria, 136 



liberation by bacteria, 132 

 Nitroso-indol reaction, 132 

 Noma, 277 

 Non-pathogenic bacteria, classification 



of, 267 



Normal solutions, 66 

 Nose-piece to microscope, 18 

 Novy's method for anaerobes, 32 

 Number of bacteria in feces, 165 

 milk, 151 

 soil, 135 

 water, 139 



species of non-pathogenic bac- 

 teria, 267 



Nutrient agar-agar, 69 

 bouillon, 64 

 gelatin, 68 

 Nutrition of bacteria, 126 



Obermeier's spirillum, 404 



Objectives, 18 



Ocular, 18 



Odors developed by bacteria, 132 



from water, 139 

 Oese, 22 



Oidium lactis, 279 

 Oil, aniline, for Gram's method, 30 

 for Weigert's method, 42 



cedar-wood, 20 



immersion objective, 19 



kerosene, 258 



Oils, essential, as germicides, 257 

 Opsonin, 216 

 Osteomyelitis, S. pyogenes in, 293 



B. typhosus in, 379 

 Otomycosis, 281 



