Special Report on the Cause and Prevention of Swine Plague; Results of Experiments Conducted Under the Direction of Dr. D. E. Salmon (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891. Excerpt: ... INVESTIGATIONS OF 1889-'90. The problem of swiue diseases as it stood after the completion of these investigations up to 1889 may be stated briefly as follows: Since 1885 a well-characterized bacillus has been encountered as the cause of an infectious disease termed hog cholera, which is chiefly localized in the large intestine. Since 1886 our attention has been directed to lung disease in swine with which a bacterium is associated, which, when inoculated into swine, proves to be very virulent and may give rise to pneumonia when the bacteria are injected into the lungs. This is sufficient to demonstrate the existence of a disease differing from hog cholera, which has been called swine plague because an identical disease of swine in Germany, first described in'1885, was called Sch/ceineseuche. This lung disease was shown to be communicable. (IV.) In many of the outbreaks examined the changes found in the intestines could not be distinguished from hog cholera (except perhaps in IV). In some hog-cholera bacilli were actually detected, in others (I, VI) they could not be found. One of the problems, therefore, still before us, and a very important one, was to determine whether all outbreaks of swine plague in which intestinal lesions closely resembling those of hog cholera are present are mixed outbreaks of swine plague and hog cholera, or are simply swine plague. Much light has been thrown upon this subject by the investigations of three outbreaks given in detail in the following pages. The first is a mixed outbreak in which, however, the lung lesions are so very well marked and the swine-plague bacteria associated with these lesions so virulent that there can be little doubt that the hog cholera disease was really secondary to the swine plague. The second o...