Dr David Roberts practical home Dr. David Roberts practical home veterinarian .. drdavidrobertspr00robe Year: 1911 SYMPTOMS AND TREATMENT OF CATTLE DISEASES. 41 2. TUBERCULOSIS. A striking fact, developed from my experience as a veterinarian, is that fully seventy-five per cent, of all cattle slaughtered because of tuberculosis were also in- fected with Contagious Abortion. This observation tends to corroborate a theory at which I had arrived in another way, that Contagious Abortion germs in the system prepare the way for the entrance of other disease germs, and predispose a cow to tuberculo
Dr David Roberts practical home Dr. David Roberts practical home veterinarian .. drdavidrobertspr00robe Year: 1911 SYMPTOMS AND TREATMENT OF CATTLE DISEASES. 41 2. TUBERCULOSIS. A striking fact, developed from my experience as a veterinarian, is that fully seventy-five per cent, of all cattle slaughtered because of tuberculosis were also in- fected with Contagious Abortion. This observation tends to corroborate a theory at which I had arrived in another way, that Contagious Abortion germs in the system prepare the way for the entrance of other disease germs, and predispose a cow to tuberculosis and other serious disorders. 3. ERGOTISM. When a cow aborts, of course the act must be attributed to some cause. Many simply jump to the conclusion that the cow has been subjected to violence in some way; others attribute it to feeds or periods of excitement, without investigating the case. Feet of cows severely afflicted with Ergotism. From a photograph. Perhaps the most common cause to which abortion has been attributed is ergot. The action of ergot upon the animal has a tendency to contract the womb upon the foetus and this was thought to be the direct cause of abortion. The common term for ergot is smut, and this is often seen upon grasses, corn, and other grain, and is more prevalent during some seasons than others. In the spring of 1893, my attention was called to a number of cattle afflicted with ergotism, having consumed a large amount of June grass, the June grass being so affected with ergot as to cause this herd of cattle to lose their feet and the ends of their tails. Many of them were seen walking around after the claws and first joints had dropped off. One animal in particular was so affected as to have her feet partly drop off. But upon change of feed and a course of treatment, recovered from the disease. -^She being pregnant at the time of this trouble and carrying her calf full time, is sufficient evidence that in this case ergot had nothing to do with a
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