282 EXPEKIMENT STATION BECORD. 



Foot-rot of sheep, .7. R. Mohleb ami H. J. Washburn (U. 8. Dcpt. Afjr., 

 Bin: Anhn. Indus. Circ. O.'i. pp. 117-137, fit/. 1). — This circiihir is reprinted from 

 the annual report of the Bureau for 1904 (E. S. K., 17, p. 715). 



The parasite of common sheep scab, C. M. Johnston (Orange River Colony 

 Dept. Ayr., Biol. Dir. Leafict 2, pp. 6, figs. ,}).— Distinction is made between 

 common scab, head scab, and foot scab as affecting sheep. The common scab 

 mite is described and notes are given on its life histor.v. 



According to the present law in the Orange Kiver Colony the second dipping 

 of sheep is required to be given 14 to 18 days after the first. It is proposed to 

 change this so as to re(|uire that it be done within 10 to 14 days. 



A clinical study of braxy, R. Froehner (Deut. Tieriirstl. Wclutschr., 1^ 

 (1906), No. 30, pp. 359, 360).— Occasion was offered for a study of a number of 

 cases of this disease in sheep. The feed which the sheep received was examined 

 and found to be in good condition. It was therefore not concerned in the pro- 

 duction of the disease. 



According to the evidence obtained it appears that tiie sheep became infected 

 during the process of shearing as the result of using uncleanly shears. A bac- 

 teriological examinatiou showed the presence of the bacillus of malignant 

 oedema. 



Bursattee, F. E. I'lace (Vet. Rec., 18 (1906), No. 923, p. 6V/6').— It has been 

 found that iodized phenol is an excellent remedy for this disease. Experi- 

 ments indicate tha.t iodin is the most certain agent for destroying nematode 

 worms in the blood and feces of infected animals. 



Copper salts as a supposed preventive of hog cholera, S. Aveby (Nebraska 

 8ta. Rpt. 1905, pp. 116, 117). — Hogs were fed a solution of copper sulphate at 

 the rate of 1 \h. per gallon of water, with or without Rochelle salts, to render 

 the solution alkaline. Since the hogs seemed to endure the solution without 

 Rochelle salts, as well as when this chemical was added, the plain copper sul- 

 phate solution was used at the rate of 1 oz. per day for each hog. This treat- 

 ment continued for several weeks and caused no trouble except an occasional 

 loss of appetite. A test v/as then made to determine whether the solution of 

 copper sulphate was of any value in preventing infection of hog cholera. It was 

 found in this experiment that hogs treated with copper sulphate became 

 affected and died in the same manner as those which were not treated. 



Hog cholera, F. Koske (Arh. K. Gsndhtsmnt., 24 (1906), No. 2, pp. 305-345).— 

 As a result of numerous cultures aiid observations on Bacillus siiipestifer, the 

 author determined that the hog cholera bacillus may retain its virulence pei*- 

 fectly for 2 or 3 months in ordinary agar cultures or for 120 to IGO days in the 

 buried carcasses of pigs. 



The cultures were destroyed liy sul)jection to a Hi per cent cresol solution for 

 li minutes or a 5 per cent carbolic solution for ;'. minutes. Numerous experi- 

 ments were made in testing the susceptibility of various laboratory animals 

 and larger domestic animals to the organism of hog cholera, and notes are given 

 on the pathological condition produced by such inoculation. In the author's 

 experience there is little difference in the agglutination results as obtained by 

 the use of a monovalent and polyvalent serum. Serum obtained from an 

 inoculated ass was able to jirotect hogs against fatal doses of hog cholera 

 bacilli ]»revi()usly inoculated intravenously. 



The etiology of hog cholera and swine plague, F. IIutyra (Berlin. TierdrzU. 

 Wchnschr., 1906, No. 32, pp. 607-610, figs. ,7).— The' literature relating to the 

 controverted points regarding hog cholera and swine plague is briefly reviewed. 



In experiments carried out by the author it was found that a filtered blood 

 serum or fluid from the lungs of hogs affected with acute swine plague was 

 capable of producing an acute infectious disease after subcutaneous inoculation 



