ETIOLOGY OF THE GERMAN SWINE PLAGUE. 
557 
1st. The infectious principle or principles produced by the 
bacteria. 
2d. The susceptibility of specific species of animal life to such 
ptoinains. 
It is in reality this latter factum which decides the specific 
etilogical nature of any bacterium with regard to disease, and 
not its extra organismal micro- or biological phenomena. These 
remarks will have to serve as an introduction to Hueppe’s paper, 
selections from which will follow below. 
“Under the designation of ‘new pest among deer and cattle’ 
(Eine neue Wild and E-inde seuclie), Bollinger was the first to 
describe an infectious epidemic disease which caused much devas¬ 
tation among the deer in the parks around Munich in the year 
1878, in which there died 387 common deer, 231 wild swine and 
153 elk. The disease extended to the cattle in the neighborhood 
and caused more or less devastation. Bollinger was successful in 
tracing these outbreaks to a common cause. 
“ Pntcher described outbreaks of a similar character in suc¬ 
ceeding years, in which the domestic animals were sometimes 
affected and the wild ones not attacked, and vice versa. Fried- 
berger and Hahn caused the disease in horses and swine by inoc¬ 
ulation. Bollinger was also successful in conveying it to goats 
and sheep, while Frank received only negative results in sheep. 
Bollinger laid especial emphasis upou the susceptivity of rabbits 
to inoculation, and that they died in six to eight hours.* 
“ According to the clinical and microscopical phenomena, two 
different forms were distinguished by Bollinger; the one being 
an exanthematous, the other a pectoral variety, which he looked 
upon as different localizations in the organisms of one and the 
same cause. 
“ Notwithstanding the strong resemblance which the disease 
bears to anthrax, its absolute differentiation from that disease was 
demonstrated by Bollinger by the invariable absence of the char¬ 
acteristic £ bacillus anthracis.’ 
“Prof. Kitt, of the Munich Veterinary School, was the first 
* Tlie bacterium of swine plague, either the American or Schutz’s, does not 
kill rabbits in any such short peiiod post inoculationis.—B. 
I 
