PREVENTION OF PLEURO-PNEUMONIA. 175- 



about a beast whicli has once had the disease not being able to 

 take it again, M. Ulrich thinks differently ; and his opinion is 

 partaken by M. Verhezeu. M. Ulrich adds that the well authen- 

 ticated facts of beasts having had the disease a second, and even 

 a third time, are so numerous that we must consider before we 

 regard them as exceptional instances." * 



We now come to the French Eeport which appeared in 1854. 

 The Commission, consisted of the most eminent medical and 

 veterinary authorities of the kingdom, including Majendie, 

 president ; Eeynal, secretary ; with Bouley and Delafond of the 

 Alfort Veterinary College ; Yvart, inspector-general of the 

 imperial veterinary schools ; Eenault, Inspector of imperial 

 veterinary schools ; Eayer, a celebrated pathologist ; with others 

 whose names and positions secured their eligibility for such an 

 important task. The question before them was the contagious 

 property of the disease ; its transmission by cohabitation ; power 

 of resistance of the animal body ; susceptibility of the ox species ; 

 immunity from secondary attacks, &c. 



A number of animals were handed over to the Commission, 

 and the results drawn from their experiments, which were con- 

 ducted in the most clever and scrupulous manner, were embodied 

 in the following terms : — 



" Firstly, — The epizootic pleuro-pneumonia is susceptible of 

 being transmitted from diseased to healthy animals by cohabi- 

 tation. 



" Secondly, — All the animals exposed do not take the disease 

 — some suffer slightly, and others not at all. 



" Thirdly, — Of the affected animals some recover and 

 others die. 



" Fourthly, — The animals, whether slightly or severely affected, 

 possess an immunity from subsequent attacks." 



The Commission likewise entered into a rigid examination of 

 the practice and effects of inoculation. The subjoined are their 

 conclusions : — 



" 1. The inoculation of healthy animals of the bovine species 

 with fluid obtained from the lungs of one affected with pleuro- 

 pneumonia does not transmit the same disease. 



" 2. The appreciable signs following inoculation are those of 

 local inflammation, usually of light and simple cliaracter ; but in 

 some cases it assumes a grave and diffuse nature, united with 

 gangrenous states and complication of organs, from which some 

 die. In 61 animals out of 100 the operation was benignant ; in 

 38 excessive tumefactions arose, accompanied with gangrene, 

 and of these 11 died. Of the whole number, 88 recovered, 

 01 presenting no trace of the operation, the remaining 27 



* Eec. de M6d. Vet., April 1853. 



