35 



that flagellates that parasitise the digestive tract of an invertebrate 

 of determined species cannot adapt themselves to the intestine of an 

 invertebrate of another species. The plurality of the flagellate species 

 parasitising the digestive tract of invertebrates therefore seems to be 

 estabhshed. 



DucHAMP (J. C). Contribution jj, la Pathologie des Balkans : La Fi§vre 

 spirocheto-plasmodique des Serbes. [Contribution to the Pathology 

 of the Balkans: Serbian Spirochaeto-plasmodial Fever.] — Bull. 

 Soc. Path. Exot., Paris, x, no. 9, 10th November 1917, 

 pp. 827-834. 



Eelapsing typhus in Serbia has presented symptoms that have led 

 to its being considered as a type apart in the group of recurrent fevers. 

 It has also been remarked that, in individuals who have previously 

 suffered from malaria, this disease frequently follows recurrent fever 

 without the transition being observed. In the present paper the author 

 records the simultaneous presence in the blood of the spirochaete and 

 the Plasmodium, and to the resulting disease he gives the name, 

 spirochaeto-plasmodial fever. The co- existence of the two parasites 

 is due to the juxtaposition of the spirochaete with the plasmodium that 

 has preceded it and will survive it ; the result is an acute infection 

 grafted upon a chronic infection. 



In a note, Dr. Laveran observes that he prefers to describe the 

 malady recorded above as recurrent fever associated with malaria, as 

 being more accurate and more easily understood. He also points out 

 that the clinical conditions observed by the author of the present paper 

 are neither new nor peculiar to the Serbs. 



Laveran (A.). Identification des Virus de Trypanosomiase Equina 

 marocaine de deux Origines, [Identification of the Virus of Trypa- 

 nosomiasis of Horses from two different Localities in Morocco.] — 

 Bull. Soc. Path. Exot., Paris, x, no. 9, 10th November 1917, 

 pp. 850-856. 



In 1915 a trypanosome attacking horses that was observed in 

 various regions in Morocco, and particularly at Casablanca, was 

 described as a new species under the name Trypanosoma marocanum 

 [see this Review, Ser. B, v, p. 97]. In the same year a case of trypanoso- 

 miasis was observed in a horse at Mazagan. The author of the present 

 paper undertook experiments in order to identify the trypanosome of 

 Casablanca and determine whether the virus from these two sources 

 was of the same species. The results indicate that the Mazagan virus 

 cannot be identified with either T. evansi, T. soudanense or T. berberum, 

 while the Casablanca virus cannot be identified with T. evansi, T. brucei 

 or T. berberum. It appears however that the Mazagan virus must be 

 identical with the Casablanca one {T. marocanum). While a goat that 

 had acquired immunity for T. evansi, T. soudanense and T. berberum 

 became infected upon inoculation with the Mazagan virus, but later 

 showed immunity from the Casablanca virus, it is notable that the 

 Mazagan virus only was able to confer this immunity. 



