480 EXPERIMENT STATION RECORD. [Vol.41 



gitis by Jarvis, previously noted (E. S. R., 38, p. 785), the author presents 

 data to show that ticks, particularly Dermacentor albipictus and possibly also 

 D. venustiis, play an important part in the production of fistulous withers 

 among unbroken range horses in sections of British Columbia. 



Investigations on the pathological anatomy of infectious anemia of the 

 horse, I. Kani and K. Kikuchi {Bui. Imp. Col. Agr. and Forestry, Japan, No. 3, 

 {1917), pp. SJf, pis. 6). — This report includes a detailed account of 5 cases 

 studied. 



The etiology of an epidemic among horses (meningo-encephalitis enzoo- 

 tica; Bci-na disease), It. Kkaus, G., Fischer, and L. Kantoe [Rev. Inst. Bad, 

 lArgentina], 2 (1919), No. 1, pp. ll-i-118, pis. 6, fig. i).— The authors show for the 

 first time that Borna disease occurs in Argentina, The lesions in the brain 

 and the cultures correspond to the descriptions given by Joest and Degen 

 (E. S. R., 26, p. 786) and Johne. 



Observations with regard to the etiology of joint-ill in foals, J. M'Fadyean 

 and J. T. Edwards {Jottr. Compar. Path, and Ther., 32 {1919), No. 1, pp. 42- 

 71). — In continuation of the investigations previously noted (E. S. R., 39, p. 

 891) the authors report upon 37 cases at some length. 



The bacteria encountered in the cases described fall into four groups, namely, 

 strepticocci. Bacillus nephritidis equi, B. abort ivo-equinus, and coliform bacilli. 

 In 20 of the 37 cases examined the indications are that streptococci was the 

 cause of the lesions, since they were more or less abundantly present in the 

 diseased joints, and occurred there in a state of purity or accompanied only 

 by an inconsiderable number of other bacteria whose presence could reasonably 

 be regarded as accidental. B. nephritidis equi was apparently by itself in 

 causing the disease in four cases and was present in three others. B. abortivo- 

 equinus was the cause of the disease in two of the cases. B. coli communis, 

 or organisms closely resembling it, was probably the cause of the disease in 

 four cases, and possibly in a fifth. 



Studies on anthelmintics. — I, Experiments with repeated doses of oil of 

 chenopodium, M. C. Hall {Jour. Amer. Yet. Med. Assoc., 55 {1919), No. 4, PP- 

 416-423). — Experiments are reportetl which were conducted with a view to de- 

 termining the method in which chenopodium can be successfully employed 

 against the hookworm in the dog and to secure further data on its anthelmintic 

 action. 



The results indicate that chenopodium in repeated doses of 5 minims daily 

 for 12 doses is rather efficacious against ascarids, whipworms, and probably 

 hookworms. It has no equal as a drug for the removal of ascarids, since it 

 will in a great majority of cases remove 100 per cent of the worms present 

 in the dog and is apparently about as effective under proper conditions of 

 administration against ascarids of man and swine. 



Studies on anthelmintics. — II, The anthelmintic and insecticidal value of 

 carbon bisulphid against gastrointestinal parasites of the horse, M. C. Hall, 

 M. J. Smead, and C. F. Wolf {Jour. Amer. Vet. Med. Assoc, 55 {1919), No. 5, pp. 

 543-549). — The authors present data that lead to the conclusion that carbon 

 bisulphid was 100 per cent effective against bots and ascarids, namely, Gastro- 

 philus nasalis, G. hwmorrhoidalis, and Ascaris equorum {A. megalocephala) . 

 " In our experiments, it was uniformly 100 per cent effective against bots, 

 removing all of 690 bots from the 6 infested animals, and usually 95 to 100 

 per cent effective against ascarids, removing (approximately) 91 of 94 worms 

 from the 8 infested animals, or almost 97 per cent. 



" Carbon bisulphid gives as good results in 1 6-dram dose as in 2 4-dram 

 doses or 3 3-dram doses, and it is likely that the smaller sum total of drug 

 in the one dose is to be preferred to the greater total in several doses, especially 



