VETERINARY MEDICINE. 489 



the recovered animal with an immunity that is as a rule lifelong. These 

 facts make it permissible to hope that some artificial method of immunizing 

 horses against the disease will be dscovered. . . . When contagious equine 

 pneumonia runs a typical course therapeutic treatment is really not necessary. 

 It suffices to take such means as are possible for preventing complication and 

 sequelae." 



Researches on the immunization against tuberculosis, H. Vallee (Rcc. 

 Med. Vet., 86 {1909), Xos. 19, pp. 623-639; 21, pp. 689-693; 23. pp. 79.',-799).— 

 Previously noted from another source (E. S. R., 22, p. 185). 



A discussion of De Renzi's treatment of somatic taeniasis "with male fern, 

 and some tests of the treatment in gid, INI. C. Hall (Ainrr. Vet. Rev., 36 

 ( 1909), No 3, pp. 328-337). — In view of reports by De Renzi of an apparently 

 successful treatment of somatic tieniasis in man by the administration of re- 

 peated doses of male fern, experiments were conducted at the experiment sta- 

 tion of the Bureau of Animal Industry of this Department in order to determin*^ 

 the effect of the drug on the parasite of gid in sheep (Cosnuriis cere'bralis) . 



" Of the 3 cases of sheep treated by this method, the diagnosis of the disease 

 and the failure of male fern as a remedy was confirmed in all by post-mortem 

 examination. At least 1 of the o sheep received a very fair and adequate test 

 of the remedy, and the total failure of the remedy in this case is in accordance 

 with the supposition that in the human cases reported by De Renzi the improve- 

 ment in the condition of the patients was due to some other cause than the 

 assumed action of male fern upon encysted larval cestodes." 



A case of psoroptic mange in the dog", Hebrant and Antoine (Ann. Med, 

 Vet., 58 (1909), Xo. 12. pp. 696-698; (lbs. in Vet. Rec, 22 (1909), No. 1119, pp. 

 'i06, '107). — The case here reported is believed to be the first to appear in vet- 

 erinary literature. It is said that the dog may have been infected through 

 contact with the domestic rabbit. 



Bacillary white diarrhea of young chicks, L. F. Rettger and F. H. Stone- 

 burn {Connecticut Storrs Sta. Bui. 60, pp. 33-57, figs. 7). — In continuation of 

 investigations previously noted (E. S. R., 20, p. 386; 21, p. 586), a historical 

 review is presented, followed by an account of the symptoms and post-mortem 

 appearance, iind a description of Bnctcriam puUornm and its general charac- 

 teristics. The investigations were limited to a determination of the original 

 source of infection by B. puUorum and to the possibility of the transmission 

 of the disease through the food supply. 



A thorough bacteriological examination of the exterior of the shells of 12 

 eggs gave negative results, but the yolk of one was found to contain B. pullorum. 

 An examination of the yolks of 86 eggs which had been incubated for longer 

 or shorter periods and the majority of which contained embryos in various 

 stages of development, showed that 8 contained the organism in large numbers 

 and apparently pure, and 5 were questionable. While this lot of 86 eggs came 

 from 11 different varieties of fowls, it was noted that all the infected eggs came 

 from the Buff Orpingtons and Rhode Island Reds. On another occasioTi 16 

 eggs were examined, none from Rhode Island Red hens, and the results were 

 negative. Of 23 hens killed 21 were found to have pathological ovaries and 

 from 9 of 20 examined pure cultures of B. pullorum were obtained. 



Of 280 chicks, representing several varieties, hatched and brooded by botli 

 natural and artificial methods, the total mortality to the age of 5 weeks was 

 36 chicks, or 13 per cent, and the total deaths from natural causes. 29 chicks, 

 or 10 per cent. When, however, 50 chicks as taken from the incubator were 

 given a few drops of a water suspension of B. pullornin by means of a medicine 

 dropper, the same water suspension being also added to the drinking water and 



31125— No. 5—10 -7 



