. Pathological technique; a practical manual for workers in pathological histology and bacteriology. —In thesputum from tubercular cases small, opaque, yellowish-whitemasses from the size of a pin-head to that of a small peacan occasionally be found, which spread out beneath a cover-glass like a bit of cheese. They are small caseous masseswhich are valuable for microscopic examination because theyusually contain tubercle bacilli and elastic fibers. 2. Fibrinous casts of the bronchioles can usually be foundin the sputum from the third to the seventh day in cases ofacute lobar pneumonia. They ap
. Pathological technique; a practical manual for workers in pathological histology and bacteriology. —In thesputum from tubercular cases small, opaque, yellowish-whitemasses from the size of a pin-head to that of a small peacan occasionally be found, which spread out beneath a cover-glass like a bit of cheese. They are small caseous masseswhich are valuable for microscopic examination because theyusually contain tubercle bacilli and elastic fibers. 2. Fibrinous casts of the bronchioles can usually be foundin the sputum from the third to the seventh day in cases ofacute lobar pneumonia. They appear as yellowish-white orreddish-yellow threads, 2 to 3 mm. thick and \ to severalcm. long, and are often branched. The large ones are oftenrolled into balls, and show best after being shaken in of the bronchi are found in cases of fibrinous bronchitis. 3. Curschmanns spirals (Fig. 150) of twisted threads ofmucus enclosing epithelial cells and leucocytes occur rarely,except in bronchial asthma. They appear macroscopicallyas grayish-white or whitish-yellow masses or threads, \to \\. Fig. 150.—Curschmanns spiral; X 425 (W. H. Smith; photo by L. S. Brown). mm. thick and \ to 8 cm. long, and often show a visiblespiral arrangement. 4. Dittrictis Plugs.—These are whitish-yellow masses from CLINICAL PATHOLOGY. 465 the size of a pin-head to that of a bean, which are formed incases of putrid bronchitis and of gangrene of the have a very fetid odor, a cheesy consistency, and arerather easily compressed. Besides organisms they containnumerous fat-crystals. -5. Shreds of tissue are found almost solely in gangrene ofthe lung, and are best recognized with the microscope. 6. Concretions, portions of cysticercus membrane, etc., arerare in the secretion from the lungs. Microscopic Examination.—Microscopically, the sputummay show various kinds of cells, fragments of tissue, includ-ing elastic fibers, vegetable and animal parasites, and crystals. They will be taken
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Keywords: ., bookcentury1900, bookdecade1910, bookidpath, booksubjectpathology