EXPERIMENT STATION REPORTS. 



197 



were those which manifested symptoms of chicken pox most plainly prior 

 to vaccination. 



Thus as a curative agent the vaccine did not prove of any value. An 

 effort to determine its prophylactic efficiency ^^dll be made during the next 

 fall and winter. 



Various medicinal agents such as trypan blue, powdered alum, potassium 

 permanganate, argyrol, iodine and glycerine equal parts and aborno were 

 tried out in the laboratory and on several large poultry farms. None of 

 these seemed to possess any outstanding curative or jDreventative qualities. 

 Further tests are necessary to definitely determine the value of these drugs 

 and it is hoped that the work may be continued next year. 



A number of experiments were started on bacillary white diarrhea for the 

 purpose of determining the importance of the male as a carrier and spreader 

 of the infection. Rather extensive studies have also been made of the 

 various and biological tests for bacillary white diarrhea. The work on this 

 disease is being prepared for publication. 



Miscellaneous diagnostic work comes under two classes, namely, sero- 

 logical and tuberculin tests and autopsies. 



The tuberculin test was run on 117 chickens, 4 were positive and 113 

 negative. 



The Agglutination test for bacillary white diarrhea was run on 2,779 sam- 

 ples of sera; of which 273 were positive, 92 very weak or doubtful in reaction 

 and 2,414 negative. 



The folloAvuig table shows the results of the 146 autopsies. 



II. A fatal disease of colts. — During the former half of the month of March 

 1^22, a fatal disease occurred among suckling colts of this College. Three 

 colts died less than 36 hours after being foaled and one, which was given 

 160 cc. of its dam's blood intravenously a few hours after birth, lived about 

 eight days. A similar or identical disease occurred also in the latter part of 

 April, 1917. At that time it was studied by Dr. E. T. Hallman and I. F. 

 Huddleson, who described it as an acute interstitial nephritis of the equine. 

 This disease was studied bacteriologically. iVn organism showing the same 

 cultural and morphological characteristics as the one described by Mr. 

 Huddleson in the Journal of the A. M. V. A., Vol. LI, N. S., Vol. 4, No. 5, pp. 



