=Lesions.= Bacteriological examination, or even a naked-eye examination, made immediately after death enables one easily to differentiate between the two conditions. When the animals have died very rapidly—in one night—lesions of enteritis alone are present. More marked cases exhibit thickening and intense congestion of the mucous membrane of the abomasum, which may be of a deep mahogany colour. The intestine itself is affected, and even though the glandular epithelium is little changed, the intercellular spaces show ecchymoses and multiple hæmorrhages, which give the contents of the digestive tract the appearance of wine lees. The abdominal viscera scarcely present any characteristic lesions. The liver has the appearance of having been boiled, as in many forms of poisoning. The kidney is congested and blackish; the spleen only appears hypertrophied when post-mortem examination has been delayed and microorganisms from the intestine have invaded the circulatory system. After death the kidneys and spleen very rapidly undergo softening. =Nervous form: Symptoms.= Whilst in the first form the symptoms appear especially due to diastatic ferments present in the pulp liquid, in the nervous form they appear rather to result from the convulsing and paralysing action of ptomaines. The ox seems more particularly susceptible to the action of the latter. It shows symptoms resembling those of horses suffering from a severe abdominal form of influenza: profound depression, mahogany-coloured conjunctiva, lachrymation, infiltration of the cornea, high temperature (104° to 106° Fahr.—41° to 41·5° C.), strong action of the heart, but small pulse. The cerebral symptoms are especially marked. The animal suffers from vertigo, and when excited, or when attempts are made to administer medicine, it thrusts its head against the wall, as though suffering from a cerebral tumour. It also shows hyperæsthesia, slight colic, and sensitiveness of the abdomen. In sheep the symptoms consist in alternate extreme depression and extreme excitability. In both species the termination is always rapid: death occurs in a few days. The abdominal =lesions= are identical with those of the acute form. They consist in gastro-enteritis, or, rather, intense congestion of the abomasum and intestine, with extravasation of blood around the acini of the glands and beneath the mucous membrane, etc., and in more or less marked desquamation of epithelium. The annexed organs sometimes present secondary changes: in the nervous centres the lesions are more marked; the meninges are congested, in some cases inflamed, and cerebro-spinal fluid is present in increased quantity. =Subacute or Chronic form: Symptoms.= This form is equally frequent in the ox and sheep; it develops insidiously, and for a time may escape detection.