EXTRACTS FROM EXCHANGES. 
507 
gives the unnerved parts time to accommodate themselves to 
the new condition, favors healing of the disease for which the 
operation was performed, and last, but not least, permits every 
iota of hyperasthesia to leave the surgical wound.— [L. A. Mi) 
EXTRACTS FROM EXCHANGES. 
GERMAN REVIEW. 
By Adolph Eichhorn, D.V.S., New York City. 
The Changes in the Dog in Rabies, and the Patho¬ 
logic-Anatomical Diagnosis of this Disease [By G. Heb- 
rant\ .—The diagnosis of rabies on dead animals has always 
been known to be difficult, as the disease does not leave specific 
changes which could be detected by the naked eye. The histo¬ 
logical examinations of the central nervous organs were also 
without positive results. On the other hand, last year, Nelis 
published a work in which he communicates that the peri¬ 
pheric, cerebro-spinal and sympathetic ganglions always show 
marked changes, produced by the virus of rabies. These consist 
of atrophy , immigration of new cells into the nerve cells , and de¬ 
struction of the same . This work of Nelis received a prize 
from the Belgian Royal Academy of Medicine. The author 
examined the results of Nelis, and confirms the same. The 
principal change shows the plexiform ganglion ( Plexus gangli- 
for mis de Willis et de Vicusseus)\ the same is in the dog spiral 
shaped, and in large dogs, it may reach the length of i cm. It 
lies on the vagus, shortly after its exit from the jugular fora¬ 
men, and touches the superior cervical ganglion ; this lies on 
the sympatheticus, is reddish and oval shaped. To find the 
ganglion is quite easy. After the removal of the skin and 
muscles, which cover the lateral face of the larynx, we meet 
superiorly to this the common branch of the vagus and sym- 
patheticus, which is to be followed upwards until reaching the 
wing of the atlas. Here it bifurcates ; the stronger branch is 
the ganglion plexiform, while the finer guides the superior cer¬ 
vical ganglion. For histological examinations, the question¬ 
able ganglion is to be put for 12 hours into absolute alcohol, 
then for one hour in xylol or chloroform, following this by the 
paraffin imbedding. The sections are dyed after Niss’ method. 
—[Annales de Med. Vet.) 
