1126 EXPERIMENT STATION RECORD. 



that the normal serum of experimental animals of the laboratory does not agglutinate 

 the bacillus of hog cholera. Under the influence of a single subcutaneous injection 

 of a culture of hog cholera bacillus the serum of hogs develops a slight agglutinating 

 power. There is no relation between the agglutiuating power of the blood serum of 

 normal animals and the immunity or the natural susceptibility of these animals to 

 hog cholera. There is also no connection between the agglutinating power of a serum 

 of animals affected with hog cholera and its bactericidal power. 



Prophylaxis of hog cholera, A. Cinti-Luciaxi {Gior. II. Soc. Acccld. I'et. Hal., 

 51 (l'j02), Xo. So, pp. S7o-S77). — Attention is called to the great losses suffered 

 among hogs as the result of this disease and to the desirability of securing some 

 effective remedy which may be successfully employed on a large scale. 



A method of vaccinating- against hog cholera according to Poels, II. Anker 

 {Tijdschr. VeeartMuijk. Maandblud, 30 {1902), Xo. 2, pp. 63-SO). — The details of various 

 methods of vaccination against this disease are discussed and the method of Poels 

 was thoroughly tested by the author. As a result of these experiments it was found 

 that the use of Poels's method may cause the death of healthy pigs, ^"accinated pigs 

 may suffer from a chronic form of the disease and may die after a period of weeks or 

 months. They may also contract the disease in an acute form. It is urged, there- 

 fore, that great caution should be observed in the use of this method since healthy 

 pigs from 9 to 11 weeks old were found to be unable to withstand the operation. 



Infectious catarrhal pulmonary inflammation in hogs, L. (Ireve {Dent. 

 Tkrdrztl. Wchnnchr., 10 {1902), Xo. 52, pp. 491-493).— X number of outbreaks of this 

 disease were observed by the author. The incubation period appears to be about 10 

 to 14 days, but may be as long as 24 days. In older hogs the disease assumes a mild 

 form, but in young pigs, 6 to 10 weeks of age, the affection is of a more serious 

 nature. The disease may be transmitted from one animal to another by association 

 in the same pen. During the first few days of the disease the animals cough rarely, 

 but later the cough becomes more frequent and more violent. After a period of 

 several weeks the symptom of coughing gradually becomes less marked, but affected 

 animals appear never to recover entirely from the cough. During the first stage of 

 the disease the anterior lobes of the lungs are affected to a considerable extent. A 

 post-mortem examination and bacteriological tests furnish criteria for making the 

 differential diagnosis between this disease and swine plague or other diseases with 

 which it might be confused. In treating the disease it was found necessary to isolate 

 affected animals and to keep them in warm quarters with good ventilation. The 

 author tried 2 experiments in the use of creosote preparations in treating this dis- 

 ease. Creosotal was found to check the coughing in a pronounced manner within a 

 short time. According to the author, the disease is apparently l)ecoming less i-evere 

 in localities where it has persisted longest. 



Third report on surra of cattle and horses in the Protectorate of Togo, 

 Schilling ( Cbi/5Z. Bakt. u. Par., 1 Aht., 33 {1903), Xo. 3, Grig., pp. 184-189, fig. 1).— 

 Observations were made on 7 horses affected with spontaneous cases of this disease, 

 and it was found that Trypanosoma might be absent from the blood and organs, 

 especially the bone marrow. Attempts to immunize horses by inoculation with 

 blood parasites which had first been passed through dogs were without result. 

 Similar negative results were obtained from the use of material which had been 

 passed through both dogs and rats. The incubation period in cases of natural infec- 

 tion was found to be not longer than 9 days, while the course of the disease occupied 

 from 43 days to 8 months. Two experiments were made on steers, during which 

 blood parasites were used which had been subjected to 8 passages througii both dogs 

 and rats alternately. The previous treatment of these blood parasites did not prevent 

 the development of acute diseases. A quite pronounced parasitic property, however, 

 was developed in the blood serum, and it is believed that some results may be hoped 

 for from experiments along this line. Further experiments of the same sort on cattle 



