184 EXPERIMENT STATION RECORD. 



Bacteriological diagnosis of chronic swine plague, Junack {Ztschr. Infec- 

 tioHSkrank. u. Hyg. Haustiere, 1 (1906), No. 2-:i. pp. 153-166, fig. 1). — Data are 

 given regarding tlie bacteriological diagnosis in a large number of cases of pure 

 swine plague, eonibinatioii swine plague and bog cbolera. pure hog cholera, and 

 intestinal csitarrh of pigs. The bacteria obtained in these tests are enumerated. 



It appears from the author's study that in case of the prevalent chronic form 

 in swine plague a negative bacteriological finding does not decide the matter for 

 the reason that the demonstration of BaciJlus SHiscpticui< fails in about one-third 

 of the chronic cases of the disease. In such cases the anatomical findings and 

 the infectiousness of the disease makes it possible to reach a diagnosis. Certain 

 races of B. sulsepticus when cultivated on artificial nutrient media form short 

 rods in addition to long threads and retain both of these forms when inoculated 

 into other animals or maintained from generation to generation on artificial 

 media. 



Active immunization against hog cholera, M. Prettner ( Berlin. Tieriirztl. 

 Wvhnschr., 19(16. Xo. 1(1, pp. ITS, ll'i). — Hogs were inoculated intraperitoneally 

 with the organism of hog cholera and subsequently an exudate was obtained 

 from these hogs which, after sterilization, was used in testing its immunizing 

 power on other hogs. Four parallel tests were made in each of which one ani- 

 mal was treated with this exudate and the other not. In all cases the immune 

 animals remained healthy without any reaction. The author believes that his 

 experiments justify the hope of obtaining a method of producing active immun- 

 ity in hogs by means of an exudate caused by Bacillus suipestifer, but not 

 containing bacteria. 



Glanders: Its nature, distribution, and prevention, P. Fischer (Ohio Live 

 Stock Assoc. Bui. 6, pp. 9). — The successful control of glanders in the author's 

 opinion depends upon the education of horse owners in an understanding of 

 the dangers of this disease and in a thorough appreciation of the wide distri- 

 bution of the disease and the danger of allowing infected horses to be utilized 

 in any way which will bring them in contact with healthy horses. Attention is 

 called to the danger of infection from glanders in unsanitary stables, black- 

 smith shops, and from public watering troughs. 



The establishment of a simple basis for judging mallein reaction, Foth 

 (Fortschr. Vet. Hyg., 3 (1906), No. 11, pp. 2^1-249). — The author summarizes 

 a number of results obtained in the use of mallein for the purpose of determin- 

 ing the reaction which usually occurs in typical cases of glanders. 



As a result of this study it is concluded that mallein is a suitable reagent 

 lor determining glanders in herds of horses at a comparatively small expense. 

 At present, however, it is a difficult matter to establish an exact standard for 

 the mallein reaction. In order that such a standard may be set up it is con- 

 sidered necessary to carry on experiments with horses artificially inoculated 

 with glanders in order to be able to test them with mallein at periods of known 

 length after the beginning of infection. Mallein nuist also be tested more 

 extensively on horses known to be nonglanderous. It is considered desirable 

 also to compare the mallein reaction with the results obtained by agglutination. 



Malarial fever in horses, A. T. Peters (Nebraska Sta. Press Bui. 22, pp. 7, 

 figs. 3). — The symptoms and prevalence of this disease are briefly described. 

 The disease has been observed in Nebraska since 1902 and has caused the death 

 of many horses. Affected animals become gradually emaciated and the number 

 of red blood corpuscles much reduced. The author did not succeed in obtaining 

 cultures of any organism which might be considered as the cause of the dis- 

 ease. A pai'asitic worm was found in connection with the disease, and fui'ther 

 study will be devoted to this parasite and to the possible occurrence of patho- 

 genic bacteria, 



