884 EXPERIMENT STATION EECOED. 



or entirely obscured. This, with a severe irritation of the head, causes th© 

 animal to be extremely restless and to walk aimlessly about until exhausted. 

 It occurs in Utah and surrounding States, the greatest losses occurring in 

 southern and central Utah, southern Idaho, eastern Nevada, and western and 

 southern Wyoming. It is a condition induced by severe exertion of sheep during 

 very warm weather, especially after a cold storm or cold night, and is not trans- 

 missible from affected to healthy sheep. It attacks all kinds of sheep, both 

 young and old, male and female, but is not common among lambs. 



It may be prevented by handling the sheep properly, that is by not driving 

 them too far or too fast on the trail, especially before shearing in the spring. 

 When sheep are affected they should be dropped out of the herd, or the entire 

 band should be held and allowed to rest, in the shade if possible, and be moved 

 only during the cooler parts of the day. Sheep with swelled heads should have 

 their heads anointed with olive oil or vaseline and be kept quiet for from 12 

 to 24 hours. 



Vaccination ag'ainst sheep pox with sensitized virus, C. Dubois {Rev. G6n. 

 MM. Vet., 22 {1913), No. 264, PP- 649-661) .—The purix)se of these experiments, 

 which were made with young or adult sheep, was to test the efficiency of the 

 vaccine upon breeds of sheep which are very receptive to pox. The animals, 

 15 in all, were given one-quarter to one-half, and whole doses (0.2 cc.) of 

 vaccine. They were found to be extremely sensitive toward the vaccine and 

 3 out of 5 receiving the one-quarter dose reacted distinctly. When the entire 

 dose was given, all the animals gave a positive reaction, but although the latter 

 findings speak in favor of giving an entire dose, the symptoms which follow 

 are rather intense. 



The lambs and sheep under treatment behaved better than did the ewes. 

 Ewes in lactation, when vaccinated, show a diminution in their milk secretion, 

 but those in a period of gestation rarely abort. 



The method produces an immunity which protects animals against an infec- 

 tion such as would be produced when the sheep are kept in contact with 

 naturally diseased animals. The vaccine is without danger and in infected 

 localities the use vl the sero-vaccine is advised. 



Experimental studies on contagious agalactia (deficiency of milk) in goats 

 and sheep, R. Marra and N. Cocciante {Gior. R. Soc. Nas. Vet., 61 {1912), 

 Nos. 15, pp. 329-337; 16, pp. 353-360; abs. in Inleniat. Inst. Agr. [Rome], Mm. 

 Bui. Agr. Intel, and Plant Diseases, 4 {1913), No. 4, pp. 608, 609).—" The writers 

 give first a short review of the various works so far published dealing with 

 the contagious agalactia of sheep and goats and then pass on to a detailed 

 account of the disease. The chief symptoms of the latter are fever, alteration 

 of the lacteal glands, joints, and eyes of the animals ; but, as a rule, the former 

 are alone affected. 



" The writers were able to produce the malady artificially in healthy sheep 

 by means of subcutaneous injections of the blood or milk filtrate taken from 

 diseased animals. Further, they were able to prepare a serum for immuniza- 

 tion against ■contagious agalactia which has proved to be very efficient." 



Interim report of the departmental committee appointed by the Board of 

 Agriculture and Fisheries to inquire into swine fever, with minutes of 

 evidence, index, and appendix {Bd. Agr. and Fisheries [London], Interim Rpt. 

 Dept. Com. Sicine Fever, pts. 1 {1911), pp. 16; 2 {1911), pp. IV +398, figs. 4; 3 

 {1914), PP- 4-\-38). — ^These reports include the deliberations of the committee 

 appointed to study the following points: "(a) To what extent is it possible 

 for contagion to spread by infective excretions being carried mechanically by 

 attendants and animals other than swine, (b) Whether external parasites, 

 such as certain lice, carry the disease from sick to healthy swine, (c) Whether 



