In the _subacute_ and _protracted_ cases, there is the short incubation (1 day), followed by hyperthermia, drooping tail, hiding under the litter, flushed eyes, nose and mouth, impaired appetite, arched loins, hollow flanks, retracted abdomen, cough easily roused by driving, and signs of consolidated lungs in their lower parts (crepitation, suppressed murmur, abdominal or heart sounds etc.). After a day or two the skin becomes flushed and together with the visible mucosæ the seat of petechiæ. The superficial lymph glands are enlarged. The bowels are usually confined but as the disease advances diarrhœa may set in. There is rapid loss of condition, and the patient may die as the result of exhaustion, toxin poisoning, colliquative diarrhœa, or other condition. _Diagnosis during life_ is based largely on the shorter incubation, the greater reddening of the visible mucosæ, the comparative absence of abdominal tenderness, and offensive diarrhœa, and the constancy of the cough and other symptoms of broncho-pneumonia. _Post-mortem._ It is marked by the constancy and predominance of the lung lesions, and the comparative absence of ulceration of the ileum, cæcum and colon, and especially of the projecting, laminated, button-like, necrotic sloughs. The morphology of the bacillus, its habit of polar staining, its lack of automatic movements, its comparatively poor growth in alkaline bouillon, on potato, gelatine and agar, its inability to ferment glucose with the production of gas, its rapidly fatal action on hens and pigeons as well as on rabbits and guinea pigs serve to distinguish it from the microbe of hog cholera. (See table p. 38). _Prevention._ In this connection the reader is referred to the precautions, given under hog cholera, against conditions, hereditary, hygienic, climatic, dietetic, parasitic, etc., which lay the system more open to microbian invasion. In the matter of exclusion of the bacillus, the swine plague germ is less difficult to deal with, because it is so much more easily destroyed. Disinfect the buildings, and all contaminated objects as advised under hog cholera, clean yards, and shut up these and pastures or runs, and all infected water for one month. In case of public market yards and alleys, and railway loading banks, chutes, and cars, a thorough cleansing and disinfection may warrant that they may be put to use again immediately. No animals that occupied the yards before disinfection should be allowed to mingle with the new stock, as they at times carry the microbe, though themselves apparently healthy and immune. All regulations as to railway and boat transit, recommended under hog cholera, are equally applicable to swine plague. The possibility of protecting private herds, by keeping them in special pens, holding two or three each, is also the same for swine plague.