148 • ANNUAL REPORT OF THE Off. Doc. 



eerebro-spinal meningitis — it is evident that the name is inappro- 

 priate, because there is no evidence of inlhunmation in the meninges 

 of the brain or cord. Since this disease closelj' resembles the 

 sausage-poisonings and meat-poisonings of man and the carnivora, 

 and since tlie observations recorded above show that the as yet 

 undiscovered infectious or toxic principle resides in the food, I 

 wish to suggest the name " forage-poisoning " as one that would 

 be descriptive and accurate. (The Journal of Comparative Medi 

 cine, and Veterinary Archives, Nov., 1900.) 



APPENDIX NO. 3. 



A PATHOLOGY FOR FORAGE POISONING, OR THE SO- 

 CALLED EPIZOOTIC CEREBRO SPINAL MENINGITIS OF 

 HORSES.* 



(A Preliminary Report.) 



D. J. McCarthy, M.D., and Mazyck P. Ravenei., m.d. 



The disease known as infectious epizootic eerebro-spinal men- 

 ingitis of horses is but little understood. In all out-breaks there 

 seems to be a common cause, and there is little or no evidence 

 that the disease is ever transmitted from one horse to another. 

 In some cases the origin can clearly be traced to the food, and 

 Dr. Leonard Pearson has produced the disease by feeding ensilage 

 taken from a stable in which animals had been attacked. The in- 

 fluence of food is well illustrated by an outbreak which occurred in 

 a large stable in Philadelphia. It began in December, 1901, twenty- 

 seven horses being affected, of which ten died. A fresh supply of 

 food was obtained, and piled on top of the old. No new cases 

 occurred under the use of this feed, but in May, 1902, the old food 

 was again reached, and soon after fifty-nine horses developed the 

 disease, twentj-four of which died, and six were destroyed. From 

 his experiments and observations Dr. Pearson has. proposed the 

 name ''forage poisoning," a name which is more in accordance with 

 the facts as we know them at present. The term "cerebrospinal 

 meningitis" is not justified by tlie clinical history nor by post-mor- 

 tem findings. 



•From the Laboratory of the State Live Stock Sanitary Board and the William Pepper Clinical 

 Laboratory. 



