984 EXPERIMENT STATION RECORD. 



]^ inontlis. The virus has beoii found Mclivc In the carcass of an affected ani- 

 mal 24 hours after (h'ath. The i)robal)ilit.v of the disease bein« transniittetl by 

 tlies, uios(iuitot's, internal parasites, etc., is receivinj; careful investi^^ation. The 

 prognosis of the disease is very inifavorable, veterinarians in different sections 

 of the country where it is invvaleiit having reported a mortality of To ]ter cent 

 or higher. 



Treatment (luis far has been far from satisfactory. Investigations are now 

 in iirogn>ss with a view of i)roduciTig a protective vaccine or serum. 



Researches upon the piroplasm.osis of horses in 1907, A. Belizkr and 

 Makkinovski (Abs. in Jiiil. Jiisl. I'astcur, (! (IDOS), No. 17, p. IHJi). — Investiga- 

 tions were pursued l)y the authors in the province of Kiotan, Kussia. 



All of the horses attacked were found to be infested with the si)ecies of tide 

 determined by Neumann as Dcnnacciitor rcticulalUH. Native liorses are im- 

 mune while imported horses are very susceptible and often die with the 

 disease. In exjieriments in wliich diseased animals were treated with different 

 chemical products, \\w best results were obtained from injections of a solution 

 of bichlorid of mercury and sodium. Atoxyl proved to be much less etficient. 

 Tlie authors found the different stages of Piroplasma descril)ed by Koch and 

 Christoi>hers in the blood and intestines of the tick, and a t.vi)ical disease was 

 produced by injections of blood from adult ticks. The inoculation of blood 

 from imnnme horses gave good results and the authors state that inununity can 

 be produced by the injection of small quantities of infected blood, which pro- 

 duce mild cases of the disease. 



The administrative control of anthrax, F. \V. Exirich [Jour. Roy. Sanit. 

 Inst., 29 (1908), \o. 10. pp. 597-603). — Examinations made of over 600 samples 

 of dust derived from soil have failed to convince the author that this source is 

 an important factor in the dissemination of the disease in man. 



Anthrax has, however, been found in 15 per cent of tlie blood-stained wool and 

 hair examined. 



The theory and practice of antirabic immunization, W. F. Harvey and A. 

 McKendrick {ISci. Mem. Med. and ^anit. Dcpts. India, n. set'., 1907, So. 30, pp. 

 2-\--i3, pis. 2). — The authors Iiave summarized their conclusions as follows: 

 " (1) There is evidence of a direct proportion between infectivity and duration 

 of desiccation of rabies nei've material; (2) there is no evidence for this ex- 

 istence of a rabies toxin ; (3) the quantity of living fixed virus and the duration 

 of time of admiuistraticm are tlie only i)oints which need be considered in making 

 out a scheme of antirabic treatment; and (4) there is great advantage in using 

 fresh material in antirabic imnuniization (as in Hoyges' or Ferrans' methods) 

 over dried or heated material, because the former method involves the intro- 

 duction of less injurious foreign nerve substance and is more accurate as re- 

 gards dosage than the latter." 



The curative influence of extracts of leucocytes upon infections in animals, 

 P. H. Hiss, .Jr. (Jour. Med. Researeh. I!) {190S). Xo. 3, pp. 32.3-397). — Experi- 

 ments were conducted in which the animals used for obtaining leucocytes and 

 for most of the exiteriments were rabbits. The author concludes that " it does 

 not seem unlikely that extracts of leucocytes (polymorphonuclear and mono- 

 nuclear), and p()ssil)ly of the blood-forming organs, furnish us with means of com- 

 bating infections incited l)y those micro-organisms generally looked upon as 

 giving rise to endotoxin poisonings, and whicli have steadily refused to yield to 

 the action of innnune sera alone." 



Annual report on progress in the study of the pathogenic micro-organism?, 

 P. VON Baumcarten and F. Tangl (Jahrexher. Path. Mikroorgan., 22 (1906), 

 pp. XlI + 96-'i). — Tlie authors i)resent in tliis work a review of the investiga- 

 tions made during the year 1900 of the pathogenic bacteria, fungi, and protozoa, 



