1919] VETERINARY MEDICINE. 781 



"Of 15 guinea pi;: strains studied, b'> were alike In their agglutination reac- 

 tions. This apparenl Identity was further verified by agglutinin absorptions. 

 Two strains from mice and one «:t«-ii from a rabbit and from a cat us shown by 

 agglutinin absorption were identical with this group of 13 guinea pig straina A 

 distinct paratyphoid type or group of bacilli is encountered, therefore, In spon- 

 taneous Infections in laboratory animals, especially, rodents. Some <>f the strains 

 from mice and guinea pi?-'s <lo not fall Into the above group. Others belong 

 agglutinatively to the Bacillus enteritidia group. Evidently the liost origin of a 

 culture is not necessarily an index to Its biological position, and the classification 

 of strains according to origin, as Ii. typhi murium or B. pestia (miu, is aot 

 justified. 



" None of the rodent strains studied belongs to either the Ii. eholertB 8iti8 or /?. 

 paratyphoaus 'B' groups. The evidence that lias been advanced that some 

 rodent strains fall into these groups is insufficient. The prevalence of the same 

 type of bacillus in spontaneous infections of guinea pigs in widely separated 

 areas of the country is probably due to the transfer of Infected breeding stock." 



The rat-bite fever spirochete, with comparative study of human, wild rat, 

 and field vole strains, S. Kvsama. K. Kouavasiii. and K. Kasai (Jour. Infect. 

 Disease*, &j {1919), No. -J. pp- 866-875). — The authors' experiments prove that 

 the human, wild rat, and held vole strains of the spirochete of rat-bite fever 

 all represent the same species. They consider that Spirochwta morsus-muris 

 Futaki is, in all probability, similar to Spirillum minor Carter, Spirochwta 

 laverani Breinl, Spirochceta muris Wenyon, etc. 



Rocky Mountain spotted fever in the domestic rabbit, N. C. Foot (Jour. 

 Med. Research, 89 (1919), No. ',. pp. 495-507, pi. /).— "The domestic rahl.it is 

 Susceptible to infection with Rocky .Mountain spotted fever, (a) by tin' bites 

 of infected ticks (Dermacentor venustus) ; (hi by intraperitoneal injection of 

 infectious blood from guinea pins or other rabbits. This susceptibility is less 

 marked and more variable than in the case of the guinea pig. The lesions 

 produced are essentially the same sis those found in the case of the guinea 

 pig, monkey, or man. The presence of the small diplococcoid organism de- 

 scribed by Wolbach [E. S. K.. ."Ki. p. r>77|, in connection with this disease, can 

 be demonstrated in infected rabbits. Immunity is not transmitted from par- 

 ents to offspring in this species." 



Some notes on the use of tartar emetic in the treatment of domestic ani- 

 mals affected with African trypanosomiasis, II. E. IIounuy ( l < t. .lour., 75 

 (1919), No. 525, pp. 89-103).— " On account of its solubility, low toxicity, and 

 high trypanocidal action, tartar emetic is probably the most valuable drug 

 available for use on a large scale in the treatment of domestic animals affected 

 with trypanosomiasis. Its cheapness is also a point in its favor. 



"It can be administered intramuscularly or Intravenously, but the latter 

 method is the better. One am. every third day is the maximum that can be 

 administered over a long period to even the largest domestic animals. but the 

 same amount every lifth day is well tolerated by adult bovines and equities. 

 Administered secundum artem it is capable of effecting cures in domestic 

 animals infected with certain strains of Trypanosoma vivos and '/'. congolense. 

 On the other band, one frequently encounters resistant strains of the same 

 parasites. Nevertheless, were it possible (,, give the patient a course of in- 

 jections extending over a long period, I believe that most cases of disease due 

 to these two species of trypanosomes could be cured. Sometimes a single in- 

 jection will bring about this result. 



"Tartar emetic shares with all other known drugs the property of being 

 useless in the curative treatment of T. brucei infection of equines. Its sole 



