46 



After infection with N. equi the blood of a horse remains infective 

 for at least 14 months, while the blood of a horse infected with 

 P. caballi becomes infectious even before the end of the incubation 

 period. 



One of the experiments showed that in a horse infected with 

 N. equi for a long time and actually suffering from an acute infection 

 with P. caballi, the former parasite (iV. equi) was present, though in 

 an invisible form, N. equi is therefore not displaced by P. caballi. 



DU ToiT (P. J.). Experimentelle Studien uber die Pferdepiroplasmose. 

 II. Mitteilung. Uebertragungsversuche mit Ixodes ricinus bei der 

 Nuttallia-equi- Infektion. [Experimental Studies on Equine 

 Piroplasmosis. Second Communication. Experiments in the 

 'Transmission of Nuttallia equi by Ixodes ricinus.] — Arch. f. 

 Schiffs- u. Trop.-Hyg., Leipzic, xxiii, no. 8, May 1919^ pp. 141- 

 147, 2 figs. 



These experiments were made to ascertain whether infected horses 

 from the eastern fronts were likely to introduce equine piroplasmosis 

 into Germany. 



All attempts to transmit Nuttallia equi by Ixodes ricinus proved 

 negative, but this must not be taken to mean that this tick is incapable 

 of transmitting the disease. In some of these experiments the ticks 

 did not bite very well, and it is also known that all individuals do 

 not contract the infection. It is possible, though not probable, 

 that further experiments with a larger number of ticks may give 

 positive results. 



As the disease is transmitted only by certain species of ticks (which 

 do not occur in Germany) there appears to be no danger of it being 

 spread in that country, provided that the horses from the eastern 

 front are freed from ticks before being brought home. 



Taute (M.) & HuBER (F.). Die Unterscheidung des Trypanosoma 

 ' rhodesiense von Trypanosoma hrucei. [The Differentiation of 

 T. rhodesiense from T. brucei.] — Archivf. Schiffs- u. Trop. -Hygiene, 

 Leipzic, xxiii, no. 11, June 1919, pp. 211-226, 2 maps. 



The introduction to this paper summarises the grounds supporting 

 the view that Trypanosoma hrucei, the nagana trypanosome of 

 domestic animals, is not pathogenic to man and that it. is not identical 

 with T. rhodesiense, causing sleeping sickness of man in Northern 

 Rhodesia, Nyasaland, and along the Rovuma River in East Africa. 

 The military operations in East Africa [Tanganyika Territory] offered 

 an almost unique opportunity for testing this theory and Taute 

 considers that the results gained in them furnish additional support 

 of it. Among the thousands of troops and camp followers under 

 von Lettow no cases of trypanosomiasis were observed before the 

 period from February to April 1917, although they had been exposed 

 to attack by Glossina since the beginning of the War at least and 

 all the transport animals soon became infected with nagana. 



Epidemiological observations are given relating to eight different 

 foci of T. rhodesiense north and south of the Rovuma River separating 

 ex-German from Portuguese East Africa. Of these, three that were 

 previously unknown are located at the KiuUmila water- hole (situated 



