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LEROY F. THOMPSON. 
relative to them which were brought about by laboratory tests 
and experiments. 
Rabies is one that is very important to us all, so it will be the 
first on the list. 
To Negri, the Italian scientist, we owe the credit of first 
demonstrating a successful lesion, whereby we could more defi¬ 
nitely diagnose this malady, and in consequence the test has been 
named for him and is known as the Negri body test. The Negri 
bodies exist in an affected animal within the Hippocampus 
cerebri and are readily discernible as minute red areas to the 
experienced laboratorian. By this test there has been removed 
many chances for making an erroneous diagnosis on the part of 
the practitioner, thereby giving him the advantage of imparting 
intelligent advice to his patron early in the case, and in that way 
it would be the means of preventing many serious complications. 
There are many cases of hydrophobia that can be diagnosed by 
no other test, or by any symptoms presented by the patient. 
At the Kansas City Veterinary College Laboratory there has 
been presented for diagnosis 161 cases between the ist day of 
January, 1910, and the ist day of February, 1912, and which 
resulted in a positive diagnosis of 127 cases, or 79.2 per cent. 
The mortality has been decreased greatly by the use of the Pas¬ 
teur method of treatment. 
To digress somewhat, I will mention here that it is of primary 
importance that when one is bitten by a suspicious canine, it will 
facilitate diagnosis greatly by killing the dog and remove its 
head and pack it in ice and send it to a laboratory at once. I will 
also mention the fact that most laboratories are in a position 
to supply home treatment, this consisting of mailing the vaccine 
to the attending physician daily, which he injects in the patient, 
thereby eliminating the necessity , of going to a hospital as well 
as saving time and expense. 
Tuberculosis is one of the greatest maladies that we have 
ever had to combat, but, nevertheless, the laboratory is making 
great inroads on its effectiveness by giving to the world the cause 
and many prophylactic measures for its use and suppression of 
this much-dreaded disease. 
