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SUMMARY OF CURRENT RESEARCHES RELATING TO 
The blood was taken from the forearm with the usual precautions, and 
cultivated in the media commonly in use. Micro-organism i. consists of 
cocci • 75- * 5 /x in diameter ; these are frequently paired, but also are found 
singly or in chains. They were not decolorized by Gram’s method. 
Inoculation experiments on animals (rabbits, dogs, horses, fowls) failed 
to show any pathogenic property, the absence of which is ascribed by the 
author to loss of vitality, during the residence of the microbe in the 
animal body. 
Micro-organism ii. is also a coccus, of 1-1 • 25 p in diameter. Injection 
into animals was followed by rise of temperature and catarrhal conjunc- 
tivitis. In some dogs balanitis was observed. 
One horse died after injection of 40 ccm. of a bouillon cultivation, the 
most prominent features being jaundice, fever, and conjunctivitis ; the most 
important post-mortem appearance, lobular consolidations of the lung. 
From this lung, cultivations of a coccus resembling micro-organism ii. 
were obtained. In another horse injected with 100 ccm. of bouillon, the 
symptoms were fever, conjunctivitis, exudation into anterior chamber of 
eye, marked weakness of posterior extremities, and hebetude. The 
symptoms passed away in about a week. 
From a comparison of the results of these experiments on animals 
with the clinical picture of “ Hundestaupe ” the author concludes that 
the morbid appearances produced by intravenous injection of micro- 
organism ii. are comparable to those of the catarrhal form of “ Staupe ” 
and that this view receives further confirmation from the occasional 
participation of the intestinal, preputial, and nasal mucosas. 
The author is inclined to think that these two diseases may be 
identical, and it is pointed out that this view receives further support 
from the fact that Bacillus pneumoniae Friedlaender and Streptococcus 
pyogenes thrive better in bouillon which has been used for cultivating 
micro-organism ii. than in fresh bouillon. 
Bacteria of Swine Diseases.* — Dr. G. Caneva, after an examination 
of the bacteria found in certain diseases affecting pigs and other animals, 
classifies these micro-organisms under three principal categories. The 
micro-organisms dealt with are the bacteria of haemorrhagic septicaemia 
(Hueppe), hog-cholera (Salmon), swine-plague (Billings), swine-pest 
(Selander), American cattle-plague (Billings), Biiffelseuche (Oreste- 
Armanni), Marseilles Schweinseuche (Jobert, Rietsche), Frettchen- 
seuche (Eberth). All the organisms have some few characteristics in 
common ; they do not liquefy gelatin, do not form endospores, are not 
stained by Gram’s method, but when aqueous methylen-blue solution is 
used the pigment accumulates in greater or less quantity at both poles. 
On the other hand, these microbes present, in addition to obvious 
morphological differences, special characteristics which permit their 
division into three distinct classes. 
The first group comprises bacteria producing symptoms of haemor- 
rhagic septicaemia. These are non-mobile, do not thrive luxuriantly 
on gelatin ; do not grow at all on potato ; do not produce any special 
changes in milk, are found both in the blood-vessels and scattered 
diffusely throughout the tissues. 
In the second group, which includes Marseilles pig-disease, swine- 
Centralbl. f. Bakteriol. u. Parasitenk., ix. (1891) pp. 557-61. 
