VETERINAKY SCIENCE AND PRACTICE. 1021 



various parts of the nervous system, infludiufi; the intervertebral and (iasserian 

 gangha, cerebral and cerebellar cortex, choroid plexuses, cerebral ventricles, and 

 peripheral nerves of the larynx. Lesions in the intervertebral ganglia i-lost'ly 

 resemble those observed in cases of rabies as described l>y N^an (Jehuchten and Nclis. 

 The disease may be distinguished from rabies, however, by the absence of the j)eri- 

 cellular lesions in the medulla oblongata. 



The authors conclude from their study of this disease that it is not a true menin- 

 gitis, and jjropose the name forage poisoning as much more suitable. It appears that 

 all epizootic outbreaks of the disease are due to some poisonous substance contained 

 in the forage. 



Rabies in the horse, Francke {Fortsriir. Vet. Ilyg., 1 {1904), No. 10, pp. JSO- 

 2S3). — This subject is discussed in a general manner and detailed notes are given on 

 a case of equine rabies which came under the author's attention. The symptoms 

 and jiathological anatomy are carefully described on account of the comparative 

 rarity of this disease in horses. 



iRabies, D. Sime {Cambridge, Eng.: University Press, 1903, pp. XII -{-290).— The 

 purjjose of the author in this volume is to present a general account of rabies in all 

 its aspects. Special chapters are devote<i to a discussion of the salivary glands, the 

 medulla oblongata, symptoms of rabies, the occurrence of the disease in the sympa- 

 thetic nervous. system and other parts of the nervous system, incubation period, 

 rallies virus, and the animals chiefly concerned in the spread of the disease. 



Animals which are susceptible to rabies are classified into 2 groups, viz, intensitiers 

 and attenuators. Herbivorous animals intensify the virulence of rabies virus, while 

 carnivorous animals, particularly man, monkeys, and dogs, attenuate the virus. 

 While the usual outbreaks of rabies are attributable to the existence of the disease in 

 dogs, the author argues that the chief source of rabies is rabbits. Statistics indicate 

 that the disease prevails most extensively in regions where rabbits are most numer- 

 ous, and the countries where rabbits are unknown are shown to be also free from 

 rabies. Australia, Tasmania, and New Zealand are cited in proof of this proposition, 

 since rabl)its were introduced there within comparatively recent times and since dogs 

 have always l)een numerous in those islands. 



The tyi)e of rabies in ra])1)its is not usually violent and the author thus accounts 

 for the absence of epizootic outbreaks of rabies among these animals. The prevalence 

 of rallies in dogs is attributed to the fact that dogs hunt and eat rabbits, and may 

 thereby become infected by injuries to the mucous membranes of the mouth by 

 l)roken Iwnes of the rabbits. 



The etiology of rabies, A. Negri {Ztschr. Ilyg. u. Infeciionskrank. , 44 {190S), 

 No. 5, pp. 519-540). — The author (lalls attention to his discovery of an organism 

 l)elonging to the Protozoa and found in various parts of the Jiervous system of rabid 

 animals. It is claimed that this organism occurs exclusively in the nerve cells of 

 ra1)id animals and is the specifier cause of rabies. The organism is described and 

 notes are given on the lesions in the nervous system apparently due to the attacks of 

 the organism. 



During the author's investigations 75 animals suspected of being nil)i(l wei-e exam- 

 ined, and of these 52 proved to be suffering from rabies. In 5Q of these 52 cases the 

 protozoan organism was found by an examination of the hippocampus alone. The 

 author coiK^ludes, therefore, that the identification of this organism may serve as a 

 convenient and certain means of diagnosing rabies. 



A study of the etiology of rabies, A. Neori {'/Aschv. IFi/g. ii. luferdonskrank., 43 

 {1903), No. 3, ])p. 501-528, pis. 2). — An organism belonging to the Protozoa was 

 found by the author in various parts of the central nervous system, but e-sjiecially in 

 the hippocampus. This organism may be demonstrated most easily in dogs 

 which have been experimentally infected with street virus by the sululural method. 

 In the author's experience the best stain for differentiating this organism is methyl 

 blue and eosiii, according to the method <if Mann. 



