682 EXPERIMENT STATION RECORD. 



(Demerick), Michigan (Rochester I), Indiana I, California (Hall), Ohio (Pet- 

 tigrew), Ohio (Hazen), Ohio (Heinz), Kansas I, Unknown, California (Uni- 

 versity), and Michigan (Rochester II). 



" Hog cholera was diagnosed in 2 small herds of hogs, after receipt of the ani- 

 mals at the laboratory, by means of the dark field examination of the blood. In 

 other instances, positive dark field findings were secured a few hours before any 

 symptoms appeared. The spirochetes were found with less diflBculty in the 

 blood of hogs suffering from the acute form of the disease. In 2 experiments 

 the spirochetes were demonstrated in horse serum virus. Spirochetes are uni- 

 formly demonstrable in the intestinal ulcers of hogs dead from cholera." 



Spirochccta suis is suggested as a name for the organism. 



Some experiences with, hog cholera, F. F. Parkek {Amer. Vet. Rev., JfS 

 (1913), No. S, pp. 287, 288). — Hog cholera and swine plague have been very 

 prevalent in Mahaska County, Iowa, for the last 2 seasons, and during the last 

 4 months some farmers have lost their entire herds. In 1 instance a herd of 

 6.5 animals, in which there were from 12 to 15 sick shoats, was treated with 

 antihog cholera serum. Two-thirds of the animals died. In another herd 100 

 head were treated, and two-thirds survived; and in a nearby establishment 21 

 shoats not sick were immunized with serum alone and no deaths resulted. 



A further group of animals, consisting of 58 shoats, 7 brood sows due to 

 farrow in a few days, and 1 male hog weighing 600 lbs., were vaccinated. All 

 were perfectly healthy. The double vaccination method was used. " In 3 or 4 

 days from this time these sows farrowed 69 live, healthy-looking pigs. On the 

 eighth day after vaccination every hog became sick except 2, the largest sow 

 and the boar. . . . These hogs had every symptom of virulent hog cholera, 

 the characteristic fetid feces, the catarrhal discharge from the nose and eyes, 

 and red spots on abdomen and ears, these spots turning purple before death. 

 Some died in a few days, others lingering for 3 or 4 weeks. All but 17 of the 

 58 shoats died, 3 of the sows and all of the 69 little pigs." 



The last herd vaccinated consisted of 135 head which were unloaded by mis- 

 take from the cars into a packing company's pen which was never free from 

 animals having cholera. These animals were vaccinated with serum only and 

 were shipped to their destination. None of the hogs were lost. 



A practical treatise on horseshoeing', J. Tasset {Traits pratique de Mar4- 

 cJialerie. Paris, WIS, pp. 480, pis. 237; rev. in Amer. Vet. Rev., 42 {1913), 

 No. 5, p. 497). — ^A practical work. 



The rate of reproduction of various constituents of the blood of an im- 

 munized horse after a large bleeding, R. A. O'Brien {Jour. Path, and Bad., 

 18 {1913), No. 1, pp. 89-98, figs. 4).— "After the withdrawal of 10 liters of blood 

 from an immunized horse, the fluid first appearing in the blood vascular system 

 contains an amount of protein far above the normal, hemolysin and diphtheria 

 antitoxin are reproduced at different rates, and the rate of reproduction of the 

 various proteins in the blood is probably associated therewith." 



Equine piroplasmosis in Panama, S. T. Darling {Jour. Infect. Diseases, IS 

 {1913), No. 2, pp. 197-202, pi. 1). — This is a detailed report of studies of which 

 a preliminary account has been previously noted (E. S. R., 29, p. 483). It is 

 stated that there is a disease among horses in the interior known as anthrax, 

 and that there can be no doubt but that equine piroplasmosis is endemic in this 

 region among native animals. 



Bacillus bronchisepticus. — Its relation to canine distemper, N. S. Ferry 

 (Amer. Vet. Rev., 43 {1913), No. 1, pp. 16-30). — Previously noted from another 

 source (E. S. R., 27, p. 782). 



