Literaturberieht. 1 69 



10. The heart: muscular tissue sometimes found softened. 



11. The lungs generally in a healthy condition; m some 

 intense cases, interlobular emphysema. 



12. The brain, in some cases, congested and softened. 



In pronouncing the diagnosis of this disease beyond all 

 dispute, the revelations of the microscope place the final seal 

 upon all this group of symptoms and pathological changes. The 

 blood, and bile, and liver, under this (microscopic) test , give us 

 a view of that factor which is the poison, which has produced 

 these changes and death." 



Zufolge ausführlicher Untersuchungen wird die Incubations- 

 zeit für die Texaspest auf 4 — 6 Wochen angegeben. 



Die unter den Viehhändlern verbreitete Ansicht, dass eine 

 Art Holzbock (wood -tick, Ixodes reticulatus) die Krankheit er- 

 zeuge oder wenigstens tibertrage, wird widerlegt. 



Es wird weiterhin die Analogie zwischen der Texas-Einder- 

 pest und den Infektionskrankheiten des Menschen beleuchtet 

 wie folgt: 



„Here was a bovine pestilence that appeared to infect nearly 

 all the cattle that grazed ever the trail of freshly arrived Texas 

 herds, and which destroys eighty per cent of all the Northern 

 cattle that have become obviously infected. And yet, notwith- 

 standing this fatality of the unseen contagium, the contagiousness 

 itself is subject to such contingencies and exceptions, that it 

 the more strongly promised to aid in unveiling very impor- 

 tant truths relating to the origin and propagation of certain 

 pestilences that afflict the human family within limited districts. 

 Yellow fever, cholera and typhoid fever variously represent the 

 kinds of contagia and classes of yet undiscovered material causes 

 which need, if possible, to be individually described, so that the 

 hygienic control of them may be more definite and absolute. 

 And, as regards a remarkable association of analogies that we 

 have found to exist between the Texas Cattle Disease and the 

 yellow fever, as witnessed in the human family, it may be 

 remarked that we are now fully warranted in adopting the 

 expression used by Dr. Stiles in his report, that the „Texas 

 cattle disease, when judged by its pathological lesions, might be 

 termed the yellow fever of cattle." A detailed account of these 

 analogies need not be presented here, but it suffices to state 



