156 TYPHOID FEVER. 



How does it stain ? 



How does it behave in the presence of oxygen? 



How does it grorv on different media ? 



What animals are susceptible ? 



How are inoculations performed ? 



What symptoms a e produced by inoculation? 



By whom was tho bacillus of symptomatic anthrax discovered? 



Where is it found ? 



What diseases of animals are produced by it? 



Give the description of microorganisms containing spores and vegetative 

 forms. 



How does it stain ? 



What effect does the addition of glucose to media have upon the growth 

 of this organism ? 



How does it grow in different media ? 



What are the effects of temperature on its growth ? 



How is it fatal to animals ? 



What animals are susceptible? 



How is it differentiated from other bacilli ? 



What is the effect of a non-fatal attack of this disease? 



How does symptomatic anthrax compare with malignant oedema? 



CHAPTER XYI. 



TYPHOID FEVER. 



Bacillus Typhosus. 



History. The presence of a microorganism in cases of 

 typhoid fever was discovered by Eberth, in 1880; it was 

 named the Bacillus typhosus ; but until isolated and described 

 by Gaffky, in 1884, it was not fully recognized. 



It is found after death in the blood, spleen, liver, intestines, 

 Peyer's patches, and mesenteric ganglia, and during life in the 

 blood, especially when the same is taken from the spleen by 

 means of a hypodermatic syringe, in the rose patches, in the 

 urine and feces, and outside the human body, occasionally in 

 water and soil contaminated with dejecta of typhoid patients, 

 and often in milk, which is due probably to the cleansing of 

 the utensils in which the milk is collected with water con- 

 taminated with the bacilli (Figs. 63 and 64). 



Morphology. The Bacillus typhosus appears as a rod with 



