. A practical treatise on medical diagnosis for students and physicians . y a network of fibres. If the mass be broken up, numerous club-shaped forms are seen at the periphery, while at the centre a sort ofdetritus alone is observed. The micro-organism belongs to the class offission-fungi, and the club-shaped bodies are the degenerated forms. (SeeFig. 325.) Grams method of staining brings out the threads of the network mostdistinctly. The centre is made up of a network of minute sphericalorganisms, with converging, constituent threads. The whole is sur-rounded by a delicate envelope. The pear-
. A practical treatise on medical diagnosis for students and physicians . y a network of fibres. If the mass be broken up, numerous club-shaped forms are seen at the periphery, while at the centre a sort ofdetritus alone is observed. The micro-organism belongs to the class offission-fungi, and the club-shaped bodies are the degenerated forms. (SeeFig. 325.) Grams method of staining brings out the threads of the network mostdistinctly. The centre is made up of a network of minute sphericalorganisms, with converging, constituent threads. The whole is sur-rounded by a delicate envelope. The pear-shaped bodies may be definedby Weigerts process. Make a solution of 20 of absolute alcohol,5 of concentrated acetic acid, 40 of distilled water, and sufficientFrench extract of litmus to color it ruby-red after repeated filtering. Inthis solution the cover-glass preparations are allowed to remain for anhour, and then rinsed with alcohol rapidly and placed in a 2 per cent,gentian-violet solution for three minutes. The fluid should be boiled PLATE Section through ^wall of brain abscess sho\vingcharacter of streptotl:irix colony. Stained ^A^ithh^niatoxylin, follo^A^ed by modified Gram-Weigertnietliod, 1/12 in. homog. immersion objective. STREPTOTHRICAL INFECTIONS. 811 before use and filtered after eooliug;. The fungous threads are stained aruby-red, while the central mass of actinomyees is colorless. Diagnosis. H. D. Diseased teeth or mouth, exposure. >s, 1). Painful indolent swelling ; symptoms of empyema or bronchitis. 0. 1). Swelling about jaw slowly suppurates ; bone disease; metas-tases ; pyaemia ; enteritis. P. D. Some cases ; empyema ; bronchopneumonia. L. D. Pus ; smears ; sputum ; exploratory puncture ; ray fungus. D. I). Suppurations ; pulmonic aftections ; enteritis. Simple microscopical examination is usually sufficient to determine thenature of the fungus. The recognition is more positive if we bear inmind the peculiar character of the pus
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