47 



species, sucli as Cheyhtiis, which are said to be predacious on certain 

 harmful species. Notes on the classification and synonymy of the 

 mites concerned are included. Practical directions are given for 

 treating mange and scab. 



An appendix contains an account of the mites especially observed 

 during military operations, and a tabular summary is given of the 

 species dealt with, their systematic position and their hosts and habitats. 



LoRNiE (W. S.). The Sulphuration Treatment of Mange.— T'^/. 



Record, London, xxxiii, no. 1743, N.vS. i, no. 49, 3rd December 

 1921, pp. 953-957. 



An account is given of the treatment of mange in horses with sulphur 

 dioxide in Egypt during the war. The apparatus and technique 

 employed are described. At first only SOg was used, and gave en- 

 couraging results, but the addition of steam made a great improvement, 

 by raising the temperature, and by bringing about the combination 

 of SO2 and H2O to form H2SO3, which is evidently the ideal parasiticide. 

 It should be borne in mind that the mixture, if exposed to air, takes 

 up more oxygen and becomes H2SO4. 



Animals badly affected with ticks were similarly treated, and after 

 two hours, all the ticks were destroyed. A few camels suffering from 

 mange were placed in the baths and responded satisfactorily to the 

 treatment. Judging from his experience of treating over 200 cases, 

 the author is convinced that this form of treatment with sulphur is 

 an ideal method, being clean, expeditious, hygienic and economical. 



Sergent (Ed.), Foley (H.) & Vialatte (C). Iconologie des Rickcftsia 

 signalees en 1914 chez des Poux infectes de Typhus exanthematique. 



— Arch. Inst. Pasteur Afr. Xord, Algiers, i, no. 3, September 

 1921, pp. 215-217, 6 plates. 



Further researches are described regarding the micro-organisms 

 found in lice fed upon typhus cases, and particularly in lice that have 

 transmitted typhus [cf. R.A.E., B, iii, 33]. By feeding lice upon 

 typhus cases before and during the course of the disease, it has been 

 found that those fed during the incubation period are immune ; of 

 those fed during the first days of the disease a small proportion are 

 slightly infected ; in the succeeding days the proportion of infected 

 lice increases, and the degree of infection also becomes more intense. 

 From the 20th to the 25th day, the majority are infected, and the 

 organisms are numerous in them. These infected lice transmit the 

 causal organism to men and monkeys by biting. The organisms 

 are found more frequently in the haematic liquid of the digesti\-e 

 tract than in smears of the crushed organs, and are present both in 

 adult and in very young lice. They become more numerous in lice 

 in proportion to the length of time elapsing after their meal of infected 

 blood, but they are also found in the proportion of 1 : 5 in very young 

 lice examined immediately after biting a typhus case. No analogous 

 forms have been found in the thousands of lice dissected by the authors 

 during the last ten years in Algeria, taken from healthy persons. The 

 coccobacilli previously described [loc. cit.] have been named Rickettsia, 

 and analogous forms have been described in trench fever. Rocky 

 Mountain spotted fever, and also in healthy lice and other insects. 

 The conclusions reached in 1914 are therefore confirmed, namely, that 

 there is a remarkable coincidence of occurrence, in the bodies of lice, 

 of the virus of typhus and of numbers of these organisms. 



