2O4 BACTERIOLOGY. 



lymph * of human and cow-pox, and in the pustules 

 of true small-pox. They are regarded as the active 

 principle of vaccine lymph, since filtration deprives 

 the latter of its infectious element. t The lympha- 

 tics of the skin in the region of the pustule of both 

 human and sheep-pox are filled with cocci. Suc- 

 cessful vaccination has been stated to result from 

 artificial cultivations. J 



Streptococcus of swine-erysipelas (Microbe du 

 ? ou get du pore, Pasteur). Cocci, diplococci, chains, 

 and zooglcea have been described as present in the 

 blood in " rougct du pore" The microbes have no 

 effect upon fowls, but kill rabbits and sheep. In- 

 oculated into healthy pigs they give rise to the 

 disease, and occasion a fatal result. Inoculation 

 with weakened virus protects against virulent matter. 



Streptococcus of cattle-plague, Semmer. 

 Cocci occurring singly in chains and zooglcea. 

 They grow rapidly in artificial media. A calf 

 inoculated from a cultivation died in seven days 

 from cattle-plague. The cocci lose their virulence 

 by successive cultivation, and the weakened cultiva- 

 tions protect against the virulent disease. They 

 were observed in the blood and lymphatic glands, 

 and cultivated from the latter. 



* Cohn, Virchow' s Archiv. 1872. 



t Chauveau, Comptes Rendus. 1868. Burdon Sanderson, Reports 

 on the intimate pathology of contagion. 



t Quist, St. Petersburg^ Med. Wochenschrift. 1883. 



According to Loffler these cocci are associated with a minute 

 bacillus which is the true cause of the disease (vide Bacillus of 

 swine-erysipelas). 



