1014 p:xi*kkimp:nt station kecukd, 



nielluitlw wliu'h liavc Ihtii tlrvisi'il lor (■nliir^iii^f the oiiciiinj,' in teats wliich are 

 patlidlogifally alterrtl, ami in tlic ttcatnuMit ni various otiicr anoinalit's of these 

 orjj;aiis. 



The study of parasitic diseases of the blood, especially malaria in cattle 

 and man, E. jAi'KsfiiATii {Berlin. T'nrarzll. WclninrJir., 190o, No. .W, jrj}. 700-776). — 

 Till' author revie'ws in a critical manner some of the more important contributions 

 to a study of Texas fever in cattle and malaria in man. The life history of the 

 blood parasite of Texas fever is described in considerable detail with special reference 

 to the theoretical ex})lauation of immunity toward this disease. The author con- 

 cludes that natural or acquired immunity toward Texas fever is due to the presence 

 of asexual degenerated forms of the blood parasite. 



The piroplasmoses of cattle, E. Dsciiunkowsky and J. Luhs ( Ccnthl. Baki. u. 

 Par., 1. Alt., Or'uj., 35 {1004), No. 4, pp- 486-492, ph. 8). — According to the 

 authors, piroplasmosis in Russia apjiears under 3 forms, the first of which is observed 

 in northern Russia, the second in Ciscaucasia, and the third in Transcaucasia. The 

 form which occurs in Transcaucasia is called tropic piroi)lasmosis, and is character- 

 ized by the development of extensive hemorrhages in all organs of the body. The 

 blood parasites observed in cases of this disease occur in the form of cocci, rings, and 

 bacilli. Immunization experiments have not given satisfactory results, and the ' 

 agency of ticks in the distribution of the disease has not been definitely proved. 



Piroplasmosis of the donkey, T. H. D.vle {Transvaal Agr. Jour., 2 {1904), No. 

 6, ]>[). 1S7-19.5) . — This disease occurred in a serious outbreak in Lydenburg. The 

 j)eriod of incubation was not definitely determined, but the symptoms were similar 

 to those in equine malaria. 



Inoculation experiments with virulent blood from donkeys caused no reaction or 

 serious disturbance in dogs, rabbits, mules, or donkeys. These experiments indicate 

 that the disease is not easily transmitted in this manner until after the blood i)ara- 

 site has undergone a series of metamorphoses. The disease yields readily to medic- 

 inal treatment, and prognosis is therefore considered favorable unless the animal has 

 suffered for some time before treatment is begun. In the first stages of the disease 

 ammonium carbonate in 2-gm. doses is recommended, followed by arsenic in doses 

 of 3 gr. in 1 gm. of sulphur after the fever abates. 



The cultivation of Trypanosoma brucei, F. G. Now and W. F. McNe.vl {Jour. 

 Ariier. Med. Assoc, 41 {1903), No. 21,2>p. 1266-1268) ^— The results of the experiments 

 made by the authors in devising suitable means for cultivating the parasitic organism 

 of nagana are briefly described. T. brucei as found in the blood of infected animals 

 is exceedingly virulent, and intraperitoneal injection of virulent cultures is sufficient 

 to kill mice and rats in 7 or 8 days. Experiments in immunizing laboratory animals 

 against nagana have not thus far yielded final results. Apparently a slight protec- 

 tion was afforded by vaccination. Attention is called to the differences between 

 T. brucei and T. U-irisi. 



A trypanosoma disease of North Africa, Rennes {Bee. Med. Yet., S. ser., 10 

 {1903), No. 18, pp. 4~4-430). — During the first months of the year the autiior observed 

 a disease among horses which was apparently due to infection with a Trypanosoma. 

 The blood parasite api^ears to differ from that of dourine. The symptoms and course 

 of the disease are described in detail. Considerable fever is present and acute nervous 

 symptoms are noted together with hematuria. The organism is described and notes 

 are given on its morphology. In the author's experiments it was found to be patho- 

 genic for the gray mouse, the jerboa, and the dog. 



African coast fever, R. Kocn {Agr. Jour, and Min. Rcc. \_Natar\, 6 {1903), No. 20, 

 pp. 734-743)- — This is the author's third rej)ort concerning his investigations on 

 African coast fever. It has been found that a mild infection may be produce^] by 

 repeated injections of blood from sick or recovered animals. The severity of infec- 

 tion thus produced is not increased by repeated passages through various animals. 



