502 EXPERIMENT STATION RECORD. 



the infestation of other animals by these worms in preventing the lungworm disease 

 among deer. A considerable percentage of the hares which were examined were 

 found to be infested with the same species of worm which caused the lungworm 

 disease in deer, and it is believed that the infestation of hare may be responsible in 

 some degree for the spread of the disease during the year. 



A few diseases of the hog, A. T. Peteks {Missouri State Bd. Agr. Rpt. 1902, 

 pp. 399-405). — Notes are given on various diseases of the respiratory organs, espe- 

 cially coughing in young pigs and verminous pneumonia; and on diseases of the 

 mouth, intestinal parasites, and paralysis of the hind legs. Where hogs become 

 badly infested with lice it is recommended that they be dipped at frequent intervals. 

 For this purpose the various coal-tar preparations, such as zenoleum and chloro- 

 naphtholeum are considered effective. 



Swine fever, A. H. Berry {Jour. Comp. Path, and Ther., 15 {1902), No. l,pp. 

 1-21).— In this paper the author gives a general account of hog cholera, including 

 its introduction and spread in Great Britain; symptoms of the disease in the per- 

 acute, acute, and chronic forms; methods of taking the temperature of diseased 

 pigs; normal and pathological conditions in the alimentary tract which may be mis- 

 taken for hog cholera; pathological lesions of the disease; and the mortality in vari- 

 ous localities. Attention is called also to the modes of infection, period of incubation, 

 and methods of applying disinfectants so as to prevent undue distribution of the 

 disease. 



A preliminary report on glanders, S. B. Nelson ( Washington Sta. Bid. 50, pp. 

 28, pis. 5). — The station liegan experiments with mallein 6 years ago, and in the 

 present bulletin records of 76 animals treated with mallein are brought together. Of 

 this number 36 reacted, while 40 failed to react. In 33 of the cases which reacted 

 external symptoms of glanders were present. Notes are given on the symptoms of 

 all the cases. 



A number of experiments were planned to test the effect of repeated inoculation 

 with mallein. In 1 experiment a horse received 1 cc. of mallein at first, the injection 

 being repeated 1 week later, and thereafter at shorter intervals until the injection 

 was given daily, when the amount was increased by 0.25 cc. daily until the daily 

 injection reached 7 cc. The treatment was continued from February 2 to July 15. 

 During the treatment the animal lost in flesh, but gained somewhat after the 

 treatment was discontinued. The animal died in November, and it was found that 

 the lungs were partly filled with juis and the nasal mucous membrane was covered 

 with ulcers. In a second test an animal received 1 cc. of mallein monthly. The 

 animal died after the experiment had been continued for 5 months. The post- 

 mortem examination disclosed the presence of farcy buds and ulcers on the upper 

 portion of the air passages. In the third test a mule received'l cc. of mallein at the 

 first injection, and injections were repeated at monthly intervals, being doubled each 

 time. This animal also died during the course of the experiment, and post-mortem 

 examination showed abundant evidence of active glanders. In the fourth experi- 

 ment mallein was injected at weekly intervals, beginning with doses of 1 cc. and 

 being increased 1 cc. each week. The experiment ]a.sted from April until July, when 

 the animal died in a greatly emaciated condition. Glanderous tubercles were found 

 in both lungs. A fifth experiment was conducted for the purpose of testing the sub- 

 ject of infection of glanders. A horse which was shown by mallein test not to have 

 glanders was turned into a corral with 2 glanderous horses on July 17. The animal 

 failed to react to mallein on September 14 and also during October. On December 1 

 the animal was shot for the purpose of examination, and no evidence of glanders 

 was found. An experiment in direct inoculation was made in which glanderous 

 material was rubbed into the mucous membrane of the nose. This operation was 

 performed on June 17, and on November 28 the animal died, showing the charac- 

 teristic lesions of glanders. Popular notes are also given on the cause and methods 

 of transmission, symptoms, and eradication of glanders. 



