gQ . EXPERIMENT STATION EECOED. [Vol. 35 



Sanitary measures with respect to the slieltering, feeding, etc., of the pigs 

 are outlined. These measures, in actual trial, have been shown to reduce the 

 prevalence of the disease markedly, and are therefore recommended. 



The production of a hyperimmune serum for infectious abortion in mares, 

 E. S. Good and W. V. Smith (Jour. Infect. Diseases, 18 {1916), Ho. 4, PP- 397- 

 _^(j^ ) .—Continuing the work on infectious abortion in mares at the Kentucky 

 Experiment Station (E. S. R., 27, p. 580) the authors have demonstrated that a 

 hyperimmune serum can be prepared which has marked bacteriolytic properties 



in vitro. 



This serum protected rabbits from the lethal dose of the organism and 

 lengthened the time for abortion in one guinea pig 12 days. It did not, however, 

 prol;ect a mare from an artificial infection. The infecting dose in this case, 

 though, was much larger than would be possible in a natural infection. 



It is indicated that the serum may prove of value in a stud v\'here the infec- 

 tion is known to exist. 



Nature, cause, and therapy of pernicious anemia of the horse, K. R. and 

 R. Seydeehelji {Arch. Wiss. u. Prakt. Tierheilk., U (WW, Ho. 1-2, pp. 50- 

 ^QQ)^ — Following a brief introduction and review of the literature, the authors 

 deal with patho-anatomical and hematological investigations ; the cause of the 

 disease, including personal investigations (E. S. R., 33, p. 681) ; and therapeutic 

 tests, including the removal of Gastrophilus larvre and the use of curative 

 serums; give a summary of the pathogenicity of Gastrophilus larvse; etc. A 

 bibliography of 46 titles is included. 



Swamp fever {North Dakota Sta. Rpt. 1915, pt. 1, p. 5). — A brief statement 

 of work carried on in continuation of that previously noted (E. S. R., 26, p. 

 287). Trials of the arsenico-mercuric treatment of swamp fever gave negative 

 results, and this treatment is looked upon by the author as worthless in the 

 American form of the disease. 



In order to test the conclusions of the Seyderhelms (E. S. R., 83, p. 681) 

 that swamp fever is due to a toxic agent associated with the larva of the botfly, 

 ten botfly larv£e removed from a case of swamp fever were crushed in a physio- 

 logical salt solution and injected intravenously into an experimental horse. In 

 spite of a very severe reaction this animal did not succumb nor show any 

 marked temperature reaction or anemia during the four months it was kept 

 under observation. Its post-mortem appearances, however, resembled those of 

 swamp fever. Blood drawn from this horse about two weeks before its de- 

 struction, as well as that drawn immediately before, proved to be virulent in 

 experimental horses and, in all particulars, the clinical as well as the patho- 

 anatomical aspects of these cases resembled those seen in the artificially in- 

 duced swamp-fever cases. Blood drawn from the experimental horses infected 

 by blood from the first-mentioned horse infected another horse in a similar 

 manner. As an indication of the tenacity of the virus it is stated that the 

 blood of an experimental animal infected in 1908 and to all appearances recov- 

 ered produced the usual febrile reactions in a healthv experimental horse in 

 191.J. 



Notes on a little-known rabbit ear mite (Psoroptes cuniculi), A. B. 

 KrcKKTT (./oMr. Amcr. Vet. Med. Assoc, J/S {1916), No. 6, pp. 726-730, figs. 3).— 

 P. cuniculi, the cause of the disease commonly known as rabbit ear mange, is 

 recorded from the United States for the first time. Its presence in the ears of 

 two rabbits appears to have been responsible for their death. Ustrophorus 

 VihhuH, found In tlie hair of a white rabbit kept in a pen adjacent to one of the 

 rabbits montionod a])ove, is also recorded from America for the first time. 



On the transmission from mother to offspring- of immunity against fowl 

 cholera, P. B. IIadley {Ccnthh Bakt. [etc.], 1. Aht., Oriff., 76 {1915), No. 2-3, 



