67 



originally obtained from Brazil in the case under observation. Tins 

 may be accounted for by the hypothesis that the animals on winch 

 the ticks were reared, although not presenting any definite symptoms, 

 may yet have had the disease in a latent form. Immunity is very 

 quickly acquired, as is shown by a case in which thousands of mfective 

 embryos were placed on a cow 75 days after its first infection, without 

 producing any reaction at all. The "author considers th&t Sjnrochaeta 

 £qui and S. ovina should be treated as synonyms of *S. theileri. 



Brumpt (E.). Transmission de la Piroplasmose canine tunisienne 



par le Rhipicephahis sanguineus.— Bull. Soc. Path. Exot., Paris, 

 xii, no. 10, 10th December 1919, pp. 757-764, 1 fig. 



Experiments described in detail show that canine piroplasmosis 

 in Tunis is transmitted by Bhipicephalvs sanguineus. These obser- 

 vations in common with those previously made in connection with 

 Dermacentor reticuhius [R.A.E., B, viii, 41] show that the virus 

 can only be transmitted by adults that are the progeny of females fed 

 in the adult stage on an infected animal. 



The life-cycle of Piroplasma canis is apparently identical whether 

 transmitted' bv P. sanguineus, D. retimhtns or Haemaphysalis leaclii. 



Numerous nymphs of Ixodes ricinus and Haemaphysalis concinna 

 bred from females fed on infected dogs failed to transmit the disease. 



Mandoul (H.). Une Mission antipaludique dans la xvii® Region 

 {1917-1918). Bull. Soc. Path. Exot., Paris, xii, no. 10, 10th 

 December 1919, pp. 779-798. 



The topography of the Haute-Garonne and the neighbouring 

 districts is described. During the anti-malarial investigations^ in 

 1917-1918 Anopheles maculipennis was found to be widely distributed 

 in that region both in the plains and at an elevation of about 3,300 feet. 

 Breeding occurs in any suitable place both in the towns and in the 

 country. The presence of dense duckweed and fish prevents larval 

 development, and watercress beds are apparently not a favourable 

 medium for the multiplication of the larvae. } '^^■ 



The range of temperature under which they are able to develop 

 extends from a minimum of 58° F. (14° C.) to a maximum of 85° F. 

 (30-5° C.) The adult Anophelines appear in June and increase m 

 number during July and August more rapidly than Culicines. They 

 disappear by the end of October, whilst Culicines which appear as 

 early as the end of February may still be found in November. 

 Hibernation in this Anopjheles occurs in the adult stage. 



Although indigenous malaria is practically non-existent in the region 

 under discussion, the danger of its spread is imminent in view of the 

 demobilisation of troops. The usual preventive measures, including 

 draining of land, oiling of pools, etc., are advocated. 



ScHWETz (J.). La Maladie du Sommeil dans le Moyen-Kwilu (District 

 du Kwango, Congo beige) en 1918. Bull. Soc. Path. Exot., Paris, 

 xii, no. 10, 10th December 1919, pp. 798-812, 1 map. 



Investigations were made from October 1918 to January 1919 in 

 the Kwango district of the Belgian Congo, and the locality is described. 



