VETERINAKY MEDICINE. ( ,>l. r ) 



Both diseases may be transmitted by inoculation, bul neither is infectious. 

 The micro-organism appears to be ultra-microscopic, both are peculiar to South 

 Africa, and tin* post-mortem appearances are similar. 



In tli<> author's experience it is somewhal difficult to inoculate horses with 

 heartwater, but when such inoculation is successful the posl mortem conditions 

 arc similar to those of horse sickness. Animals which recover from the inocu- 

 lation show some immunity against horse sickness. The author recommends 4 



inoculations of the hi l from animals recovered from beartwater in producing 



Immunity against horse sickness. 



The identity of surra and nibori, A. L.wiu.w (Compt. Rend. Acad. 8ci. 

 [Paris], r,i { t905), No.26,pp. 1204-1207). — The results obtained by the author's 

 Investigations indicate quite clearly that trypauosomes found in cases of surra 

 ami mbori in camels and other animals belong to the same species Trypanosoma 

 evansi. The forms obtained in these two diseases may be varieties <d' the same 

 species, but mutually vaccinating properties are observed. 



The pathological histology of experimental infection with Trypanosoma 

 brucei. E. Sauerbeck (Ztschr. Hyg. it. Infectionskrank., 52 {1905), No. 1. i>i>. 

 -?/-m>\ />/*. .?>. — In the author's experiments with this organism it is found that 

 with rats, guinea pigs, rabbits, and dogs infection leads to death within a few 

 days in the case of dogs and rats, and within a 1'ew weeks or months in the case 

 el' guinea pigs and rabbits. 



The trypanosomes increase regularly and constantly in number in rats and 

 dogs, but arc irregular in their occurrence in guinea pigs and rabbits. In the 

 case i f some of the experimental animals the immediate cause of death appeared 

 to be found in excessive irritation of the brain. The trypanosomes apparently 

 do not develop irregular forms in the blood, but only in the lymphatic glands, 

 spleen, hone marrow, liver, and lungs. The irregular forms are the same as 

 appear in the blood after death. 



In the lymphatic glands, spleen, and hone marrow it is not the endothelial 

 elements but the free cells which are most altered by the development of large 

 nuclei. The cell multiplication in such structures precedes hyperemia and 

 enlargement of the organ. The author was unable to find any parallelism 

 between the duration of resistance to the disease and the degree of phagocytosis. 



Immunization against tsetse-fly disease, ('. Schilling (Ztschr. Hyg. u. 

 Infectionskrank., 52 (1905), No. /. pp. 149-160). — Material for the author's 

 Investigations was obtained from a horse affected with the disease and the blood 

 parasites were transferred by numerous inoculations in gray rats and dogs. 

 The parasites were also found in considerable numbers in cattle. 



It was found during these experiments that frequently the peripheral blood 

 of affected animals contains none of the blood parasites. Goats arc very 

 resistant to nagana. Experiments were tried in killing the blood parasites in 

 the peritoneal exudate of affected dogs and using this material for immuniza- 

 tion. The results, however, were not constant. 



Trypanosomiasis in camels, A. THEILEB (Transvaal \<ir. Jour.. .? i 1905), Yo. 

 Li. pp. 717-721 i. — Trypanosomiasis broke out in a herd of 36 camels which were 

 imported from Somaliland. 



Blood was taken from those camels which were evidently diseased and ulti- 

 mately from all the camels and used in inoculation of dogs. It was found that 

 only two camels were free from the disease. Since later some doubt appeared 

 regarding the health of these two animals, all of the camels were killed for the 

 purpose of stamping out the Infection. The disease in question was apparently 

 surra or a closely related infection. 



The etiology of so-called horse typhoid or petechial fever, Baruchello and 

 Mori {Dcut, Tierdrztl, Wchnschr^ 13 {lUOo). No. ~>l. mi. 589-592)* — The disease 



