592 EXPERIMENT STATION RECORD. 



With regard to African coast fever it is considered as established that the disease 

 as restricted to cattle is caused by a blood parasite, is only indirectly contagious 

 through the agency of Rhipicephalus appendiculatus and perhaps R. simus, and that 

 the blood parasite does not pass through the egg of the tick to the second genera- 

 tion. The history of the invasion and spread of the disease in the Transvaal is dis- 

 cussed in considerable detail, and reference is made to the various systems of dipping 

 and vaccination which have been tested. Koch's method of inoculation has proved 

 ineffective. The destruction of diseased animals and thorough disinfection of pas- 

 tures is recommended. Notes are also given on rinderpest, glanders, tuberculosis, 

 swine plague, anthrax, sheep scab, rabies, and meat inspection. 



Conference on bovine tuberculosis, S. Arloixg ( Ann. Soc. Agr. Sci. et Indus. 

 Lyon, 8. ser., 2 (1904), PP- 139-149). — Some of the results recently obtained in experi- 

 ments on tuberculosis are outlined by the author. 



Particular attention is given to experiments the results of which bear upon the 

 question of the interrelation between bovine and human tuberculosis. The author 

 believes that the disease is mutually transmissible between man and animals and that 

 the time has come when an organized effort should be made by all persons concerned 

 in the control of this plague. Enough facts are now T demonstrated beyond reasonable 

 controversy to form the basis of the crusade against tuberculosis. 



Anthrax, H. A. Ballou et al. ( West Indian Bui, 6 (1905), Xo. 2, pp. 156-170).— 

 The prevalence and distribution of this disease in the West Indies is discussed for 

 the purpose of calling attention to its origin and suitable means of controlling it. It 

 is recommended that in the control of this disease animals should be strictly inspected 

 before slaughter in order to prevent the distribution of infection by means of meat 

 dealers. 



Preventive inoculation for redwater, J. A. Eobinson (Agr. Jour. Cape Good 

 Hope, 27 (1905), Xo. 4, PP- 505-511). — After long experience with this disease in South 

 Africa it is recommended that for inoculation purposes the blood of animals raised on 

 affected premises should be used and in doses of 2 to 3 cc. For this purpose, blood 

 should not be kept for more than 12 hours before injection. Cattle should be inocu- 

 lated in early spring, when the range is in good condition, and should be carefully 

 treated during the period of immunization. 



Texas fever, W. H. Dalrymple (Louisiana Stas. Lid. 84, 2. ser., pp. 31, figs. 2). — 

 The bulletin contains a general popular discussion of Texas fever, including an account 

 of the name of the disease, cause, cattle ticks and their life history, symptoms of the 

 disease, post-mortem appearance, curative treatment, immunization, eradication of 

 the tick particularly by the "feed-lot" method of ridding cattle and of cleaning 

 pastures during the summer. It is believed by the author that with united action of 

 southern States and the Federal Government the cattle tick may be exterminated. 



Anaerobic bacteria as the cause of necrosis and suppuration in cattle, 

 L. Roux (Centbl. Ball. [etc.~\, 1. Abt., Orig., 39 (1905), Xo. 5, pp. 531-544) .—A 

 microscopic study was made of 27 cases of deep necrosis and abscesses in cattle with 

 particular reference to the bacterial content of these processes and the virulence of 

 the organisms found in them. In nearly all cases several species were associated 

 together. 



Inoculation experiments were made in pigeons, rabbits, guinea pigs, chickens, and 

 cattle. These inoculations were either subcutaneous or intramuscular. The bacteria 

 found in the suppurating processes are carefully described. It appears as a result of 

 these observations that several bacteria may be considered as causing necrosis in 

 cattle. Among the aerobic forms coli bacillus, streptococci, and Barter! inn ridgare 

 are mentioned, while in the class of anaerobic organisms Bacillus necrophorus, B. 

 pyogenes boiis, and a species of spirillum seemed to be the most important. In pro- 

 ducing necrosis best success is had when an organism of the first group is associated 

 with one of the second group. 



