1084 EXPERIMENT STATION EECORD. 



on the prevalence of i)nonnionia nnd tlu> re.iiul.-itions which have l^een a(lo])te(l fox- 

 controlling the disease, inchuling ijnarantine and compulsory infertion. 



Pernicious anemia of the horse, PI. Carre and H. Vali-i':e iJ'cr. Grn. Mrd. 

 Vvt., S (19(16), y<>. <>.',, PI). .->93-U()t^, pffs. .',: 9 (1907), \(,. 99. pp. IIS-I^J,, flus. 

 .'/). — According to the authors" experience, acute cases oi this disease are abso- 

 lutely incurable. In some instances improvement is noted as a result of high 

 feeding and the use of tonics, hut such improvement is more ap])arent than real. 

 Inununizatlon has not proved successful by the means thxis far adoi)ted. hut 

 further experiments along this line will be carried out. The disease is trans- 

 mitted through the digestive tract and the excretions of diseased animals are 

 virulent for some time. This suggests a practical means of checking the preva- 

 lence of the disease. 



Equine malaria, V. A. Verxey (Xatal .\(n: Jom: (nnl Miii. Rre..-l(i (191)1). 

 A'o. 7. jip. I~'i). — The ]iost-moi'tcm changes in'oduceil liy this disease are briet1.\' 

 descril)ed. It may he cured in a large ]iercentage of cases if Ejjsom salts. nit?r. 

 and (|uinin are given in large (luantlties at the outset. Equine malaria is ])rob- 

 alily carried l)y ticlvs. altliongh this has not been definitely established. 



Swamp fever in horses, L. Van Es (XorfJi DaLota Sta. lipt. HXiii. jit. 1. jip. 

 JjS-d'), plx. ()). — Eor a number of yeai's a form of anemia has been observed in 

 horses in Minnesota, the Dakotas. ;nid Manitolia. and has usixally been referred 

 to as swani]) fe\('r. It has (•.■luscd cdnsider.ible losses in infected localities. 

 Recently a disease ai)pear('d amimg horses in the Red River Valley and 

 appeared to be identical witli swam]) fever. A careful study was made of 

 this disease from thi' clinical syni])toms and autopsies, and the observations 

 made along tliis liiu- ;ii-e comjian d witli those recorded from studies of the dis- 

 ease iiL other localities. The work thus far carried on has not led to a definite 

 conclusion regarding tiie etiology of the disease. The symptoms and i>ath- 

 ological lesions are fairly constant and a variety of parasites and bacterial 

 organisms were found in affected animals. None of these, however, has been 

 shown to be the cause of the disease. 



The treatment of dourine, \'. L. Yakimov (ArrJi. ^(■t. \<nih- [St. J'ctrrf<l>.]. 

 Si) (19111!). \n. IJ. pp. <J 'i')~9Si;). — A series of experiments was carried on with 

 mice, guinea i)igs, rabbits, and dogs during which trypanrot was used to test 

 its value in the treatment of experimental dourine. 



It is found that trypanrot shows a s])ecific action in the ti'eatment of dourine. 

 Doses of (*..") cc. of a 1 ]ier cent solution arc capable of causing tlie try- 

 panosomes to disapi^ear from the l)l()od of mice if introduced within 5 da.vs after 

 the animal has been inoculated. This treatment, however, does not prevent 

 an occasional relapse. Tryi)anrot was found to possess a veiy limited pro- 

 phylactic value, but when used within from 5 to 9 da.vs after inoculation it will 

 prevent fatal results. In guinea pigs it excnx-ises a toxic effect. When admin- 

 istered in hyi)od(M'mic injections in the ])i'oi)er strength of solution, trypanrot 

 causes no bad effect in whiti' mice or gray rat~;. ])ut in guinea pigs, rabbits, 

 and dogs it produces an intianunation of the adjoining tissue. 



A little recognized cause of colic in the horse, II. IMoi.lereau (Rcr. Grn. 

 Mrtl. ^'l't.. 9 (1907). \(). 101. PI). .^'il-2'i9). — The causes connuonly recognized 

 for colic in the horse are usually ojx'i'ative in cases of this disease. The 

 author, however, had opportunity to stud.y an outbreak of colic among cavalry 

 horses which received water contaminated from sewage and carrying typhoid 

 b:icilli. When these organisms were present in large mnnhers. digestive dis- 

 tnrb.-inces were observ(Hl in the horses, under a form which coidd scarcely be 

 distinguished fi-oiii colic. In the ;\utlior"s opinion more attention should be 

 giA'en to the (lualily of water which horses receive. 



