68 MICRO-ORGANISMS AND DISEASE. [CHAP. 



were said to occur in the blood of pigs affected with the 

 disease known in France as rouget, and which Pasteur con- 

 sidered identical with the disease known in this country as 

 swine fever or swine plague. Pasteur asserts also that with 

 these micrococci artificially cultivated he has reproduced the 

 disease in swine. It appears, however, from an investigation 

 by Schiitz * that rouget is identical with the disease known 

 in Germany as erysipelas of swine, and that this disease is 

 caused not by a micrococcus at all, but by a small bacillus. 

 This disease differs altogether from swine fever in its symp- 

 toms and course. Compare also Chapter XL " Bacillus 

 of Swine Fever.'' 



FIG. 20. FROM A PREPARATION OF THE BLOOD OF A CHILD ILL WITH 

 INFANTILE DIARRHCEA. 



1. Blood-discs. 



2. Dumb-bells of micrococci. 



Micrococci occur always normally in large quantities in 

 the fluids (saliva and mucus, &c.) of the nasal and oral 

 cavities, pharynx, larynx, and trachea ; they are derived no 

 doubt from the atmosphere. On the papillae filiformes of 

 the tongue they form in some cases large masses. 2 Pasteur 8 

 has inoculated rabbits with the saliva of a child that suffered 

 from hydrophobia, and having cultivated artificially the 



1 Arbeiten aus d. k. Gesundheitsamte, Berlin, 1885. 



2 Butlin, "Fur of the Tongue, " Proc. Roy. Soc. 1880. 



3 Comptes Rendus, xlii. 



