ILLUSTRATIONS xi 



75. Large round-worm in intestine of hog 254 



76. Lamb affected with stomach worm disease 258 



77. Whip-worms attached to wall of intestine 260 



78. Pin-worms in intestine 260 



79. A hog yard where disease-producing germs may be carried over 



from year to year 270 



80. Carcass of a cholera hog 274 



8L Kidnej^s from hog that died of acute hog-cholera 275 



82. Lungs from hog that died of acute hog-cholera 275 



83. A piece of intestine showing intestinal ulcers 276 



84. Cleaning up a hog lot 278 



85. HjTJerimmune hogs used for the production of anti-hog-cholera 



serum 280 



86. Preparing the hog for vaccination 281 



87. Vaccinating a hog 281 



88. Koch's Bacillus tuberculosis 283 



89. Cows affected with tuberculosis 286 



90. Tubercular spleens 287 



91. The carcass of a tubercular cow 288 



92. A section of the chest wall of a tubercular cow 289 



93. A very large tubercular gland 290 



94. A tubercular gland that is spht open 291 



95. Caul showing tuberculosis 291 



96. Foot of hog showing tuberculosis of joint 291 



97. Staphylococcus pyogenes 293 



98. Streptococcus pyogenes 293 



99. Bacillus of malignant oedema, showing spores 294 



100. Bacillus of malignant oedema 294 



101. Bacillus septicemia hemorrhagica 295 



102. A yearling steer affected with septicemia hemorrhagica 296 



103. Bacillus anthracis 297 



104. Bacillus necrophorus 299 



105. Negri bodies in nerve-tissue 300 



106. A cow affected with foot-and-mouth disease 303 



107. Federal inspector examining mouth of suspected case of foot-and- 



mouth disease '^O^ 



108. Washing coat and boots with disinfectant after inspecting herd 305 



109. Inspector fumigating clothing 305 



110. Bacillus tetani 306 



HI. Head of horse affected with tetanus 307 



1 12. A subacute case of tetanus 308 



113. Streptococcus of strangles 309 



114. Bacillus mallei 312 



115. Longitudinal section of head of horse having glanders 313 



