Clinical diagnosis : the bacteriological, chemical, and microscopical evidence of disease . 1, is precipitated from alcoholic solution by acetic acid, and redis- 198 THE FJECES solves in excess of the acid, from which it may be again precipitatedby ferrocyanide of potassium. They resemble the mucous particles ofNothnagel, to which reference has already been made. That authorthinks that the substance in question is The discharges of infants at the breast are of a very different characterfrom those of adults. Here muscle-fibres, areolar, and elastic tissue areabsent, coagulated proteid
Clinical diagnosis : the bacteriological, chemical, and microscopical evidence of disease . 1, is precipitated from alcoholic solution by acetic acid, and redis- 198 THE FJECES solves in excess of the acid, from which it may be again precipitatedby ferrocyanide of potassium. They resemble the mucous particles ofNothnagel, to which reference has already been made. That authorthinks that the substance in question is The discharges of infants at the breast are of a very different characterfrom those of adults. Here muscle-fibres, areolar, and elastic tissue areabsent, coagulated proteids taking their place. Microscopically theyabound in fat and crystals of the fatty acid salts. 2. Formed Elements Derived from the Intestinal Tract. 1. Red Blood-Cells.—Red blood-corpuscles are rarely to be found inthe faeces. Nothnagel has examined the freshly-voided excrement oftyphoid, when it was deeply stained with blood, but could find none ofthese cells. In such hsemorrhagic stools, however, are seen larger orsmaller masses of reddish-brown pigment (heematoidin), and the rhombic. Fig. 70.—Degenerated Intestinal Epithelium (eye-piece II., objective 8a, Reichert). crystals of hsematoidin are also occasionally present. In cases where theblood is derived from the upper part of the alimentary canal or hasremained for a long time in the intestine, the faeces are no longer redlike blood, but are stained a dark-brown or black. We have alreadyseen that a similar effect may be produced by certain drugs (see underleaked-Eye Characters of the Faeces, above), and, consequently, it isnot possible to infer a haemorrhage from this appearance alone; neitherwill red blood-cells be visible under the microscope. In such cases thepresence of blood may be determined with absolute certainty by theapplication of Teiclimanns test to a dried particle of the fteces (seeChapter I.). 2. Leucocytes.—In healthy stools leucocytes are rarely to be metwith. They are always loaded with fatty particle
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