880 EXPERIMENT STATION RECORD. 



some of the infestation witli triclume must be explained as occurriuf; thi'ougli 

 the feces of infected hogs. 



A study of rabies, Stuetzdecher (Ztschr. VeteriHark., 18 (1906), No. 11, 

 pp. .'f78-.'i8J/). — Notes are given on, various methods of diagnosing i-abies with 

 particular reference to the inii)ortance vf Negri's corpuscles. One of the most 

 iHi])()rtant practical points in the control of rabies is a certain means of reliable 

 diagnosis. This, the author believes, is found in Negri's corpuscles. 



Vaccination against rabies by the Pasteur method, K. Nitsch (Centbl. 

 liiilt. [cfe.]. /. Aht.. Oriij.. .',3 {1!)06), Nos. 7. pp. 647-658; 8, pp. 775-783).— 

 The application of Pasteur's method in the control of rabies has been found 

 to reduce decidedly the percentage of mortality from rabies in animals and 

 man. The incubation period of the disease, however, appears not to be ex- 

 tended by the Pasteur treatment. 



Dog distemper and the filterable organism of Carre, .7. Lignieres (BuI. 

 Soc. Cent. Mrd. Vet.. S3 (1906), No. 22. pp. 622-630 ) .—A^ a result of his study 

 of this disease, the author comes to the conclusion that there is a speciflc filter- 

 able organism in the body fluids of dogs affected with distemper, and that this 

 organism is the principal cause of the distemper. There may be, however, 

 other organisms, particularly Pai^teureUa canix, which, acting in connection 

 with the specific organism of distemper, may cause complications or peculiar 

 sym]itoms in the course of the disease. 



Preliminary note on the development of Piroplasma canis in the tick, 

 S. K. Christophers (Brit. Med. Jour.. 1907, No. 2Jf02, pi>. 76-78. flffs. 26). — 

 Much difficulty has been experienced in following the life history of blood 

 parasites in ticks. The author had opportunity to study this matter by reason 

 of the unusual prevalence of canine piroplasmosis in India. The tick chiefly 

 concerned in transmitting the disease was Rhipicephaliis sanguineus. The 

 various developmental stages are described and illustrated by the author, and 

 it is suggested that the life liistory, as observed in PiropJa.snia cani.s, may be 

 very similar to that of other I'elated parasites. 



Further studies on fowl plague, R. Ostertag and R. Bugge (Ztschr. 

 Infektionskrank. u. llyti. Huustiere, 2 (1906), No. 1, pp. 1-9, fig. J).— It was 

 determined by inoculation experiments that fowl plague may be transmitted to 

 geese, and that in these birds the disease assumes a peculiar form showing 

 pronounced cerebral symptoms, while the blood is not always infectious. It 

 was found that the virus of fowl plague could be kept in the laboratory for at 

 least ICK) days without losing its virulence even when the material was sub- 

 jected to light. The resistance of the virus to ordinary disinfectants is of 

 average degree. 



No success was had in cultivating the virus in collodion sacs inside the body 

 cavity of fowls. It appears that fowls which have once recovered from the 

 disease possess in their blood protective substances which, however, are of 

 little strength. 



The use of the pigeon for testing immune fowl cholera serum, A. Braun 

 (Fortschr. Vet. Hijg., h (1906), Nos. 8. pp. 17^-183; 9, pp. 198-211).— The 

 pigeon has been extensively iised as an experimental animal in the laboratoi'y 

 for testing the virulence of fowl cholera virus and the effectiveness of sera 

 developed in studying this disease. The author made a careful study of the 

 problem with the special object in view of determining the suitability of the 

 pigeon in this work. The conclusion is reached that the pigeon is not suitable 

 for testing fowl cholera serum chiefly for the reason that this bird appears to 

 have a pi-onounced specific reaction to fowl cholera. The mouse, on the other 

 hand, is well adapted for the purpose. 



