82 EXPERIMENT STATION RECORD. 



Abstract of the proceedings of the conference on animal tuberculosis at 

 the University of Illinois, October 15, 1908 {Illinois Sta. Circ. 128, pp. 16). — 

 Following a brief report of a conference held at Urbana, 111., for the considera- 

 tion of animal tuberculosis, the more important points in the control of the 

 disease in animals are discussed at length. 



Measures for the eradication of bovine tuberculosis in Germany, Ij. Beante 

 {MaliiKi. Liins; Hu.shdU. HaUsk. KrrtUxki:, muH, \o. 3, pp. GU2-U8S, fiffs. .'/).— A 

 report presented to the Malmohus County Agricultural Society. 



Tick, redwater, or Texas fever in cattle, R. Wallace {Qnecnshnid Agr. 

 Jour., 20 {1908), No. 6, pp. 314-325, pi. 1, figs. 4). — A general review of the pres- 

 ent status of our liuowledge of the disease and of the ticks that transmit it, with 

 methods for tick extermination. 



The foot-scab mite of sheep (Symbiotes communis, var. ovis), T. W. Cave 

 {Jour. Compar. Path, and Ther., 22 {1909), No. 1, pp. 50-52, fig. i).— The author 

 presents an account of this parasite as occurring in a flock of yearling lambs at 

 Kent, England. Acari were found in the feet of all lambs that appeared lame. 

 The parasites showed no tendency to invade other parts of the body, remaining 

 attached to the skin of the interdigital space and the short wool growing from it. 

 Washing the feet with a 2 per cent solution of lysol was effective in destroying 

 the parasites. 



Hog' cholera and hog— cholera vaccine, M. H. Reynolds {Minnesota Sta. Bui. 

 113, pp. 255-284). — The first part of this bulletin is devoted to an account of 

 hog cholera in the light of recent Ivuowledge, wliile in the remainder is pre- 

 sented the details of immunity experiments conducted by the author in which 

 both the serum alone and serum-simultaneous methods were employed. The 

 following conclusions have been drawn, based upon these experiments : 



" In herds already infected we have vaccinated 251 hogs, of which there died 

 44 (corrected for December 28, 1908). In these same infected herds there were 

 unvaccinated 76, of which there died 68. 



" Of healthy hogs, i. e., hogs not yet exposed to infection so far as known, we 

 have vaccinated 201, of which there died 2, neither showing' any satisfactory 

 evidence of cholera. . . . 



" In the same herds, healthy at the time of vaccination, there were 9 animals 

 left unvaccinated for various reasons, usually for checks. These 9 under the 

 same exposure as the 201 vaccinated, all died. 



"Our present standard of doses is as follows: 



•' Serum.— Up to 20 lbs., 10 cc. ; 20 to 50 lbs., 15 cc. ; 50 to 100 lbs., 20 cc. ; 100 

 to 150 lbs., 25 cc. ; 150 to 200 lbs., 30 cc. ; 200 to 250 lbs., 40 cc. ; 250 to 400 lbs., 

 50 cc. 



" The dose of virulent blood is from 2 to 2.5 cc. with the exception of suckling 

 pigs, for which 1 cc. is sufficient with 10 cc. of serum. 



" The writer feels warranted in saying that we can now immunize hogs so as 

 to make them proof against cholera. 



" The method discussed in this bulletin has progressed to a point where it may 

 be considered a practical method of field vaccination. 



" This serum has excellent keeping qualities, it having been proved potent 

 after several years." 



The indications are that the danger of disseminating the disease through the 

 use of virulent blood is slight and may probably be disregarded. " This vac- 

 cine has still certain fault.s, the correction of which will add greatly to its 

 desirability. These faults are such that it seems probable that they can be 

 removed in a large measure." 



Concerning the cost of vaccine the author states: "From the best available 

 information we estimate that the serum must sell at first for about 2 cts. per 



