Diseases of swine, with particluar reference to hog-cholera . emorrhage. As in the skin and kidneys, these hemorrhagic spotsvary in size and may be very small or quite appreciably are usually, on an average, about the size of a pin-head andrather dark-red in color. When the lung is cut into with the knifeit is found to be quite congested with blood, and the cut surface iscovered with a bloody, frothy exudate. This is the picture found in an uncomphcated case of choleraaffecting the lungs. In actual postmortem work such a picture asthis is rather the exception than the rule. In most
Diseases of swine, with particluar reference to hog-cholera . emorrhage. As in the skin and kidneys, these hemorrhagic spotsvary in size and may be very small or quite appreciably are usually, on an average, about the size of a pin-head andrather dark-red in color. When the lung is cut into with the knifeit is found to be quite congested with blood, and the cut surface iscovered with a bloody, frothy exudate. This is the picture found in an uncomphcated case of choleraaffecting the lungs. In actual postmortem work such a picture asthis is rather the exception than the rule. In most cases the lunginvolvement is quite different from this, and is much more like apneumonia than cholera. In fact, where there are marked lungchanges it is nearly always the rule to find with the cholera lesionsa compHcating pneumonia. In those cases which show a pneumonia the lung is firm, swol-len, and has lost its elasticity. There is no longer any air in the LESIONS IN THORACIC CAVITY 151 pneumonic portions, and when cut it is found to be solid, resembling. Fig. 50.—Lung showing bronchopneumonia. Hog died of subacute cholera(H. K Mulford Co.). very closely liver. This is the common finding in cholera wherelesions in the chest are extensive, and when this postmortem 152 DISEASES OF SWINE picture is found, with no ulceration of the bowels, and no spots inthe kidneys, it is often hard to make a diagnosis between the twodiseases, cholera and pneumonia. However, if we examine closely, we will usually be able to finda few hemorrhagic spots in the kidneys, and also perhaps in thatportion of the lung not involved in the pneumonia changes. Insome cases the signs of cholera are so few, and the appearances infavor of pneumonia so strong, that it is necessary to resort tolaboratory tests with the blood, and injection of the suspectedblood into healthy susceptible pigs in order to arrive at a examination of the carcass of a second animal from the sameherd will reveal chan
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