. A practical treatise on medical diagnosis for students and physicians . m ^ci ■^■r^:i Pus with staphylococcus. X 800. (FLrGGE.) 2. Staphylococcus Pyogenes Albus. It is also found in acute abscesses,but less often than the aureus, and is less virulent. It is morpholog-ically identical with the aureus, but develops no pigment. The surfacecultures are milky white, and the mass at the bottom of the liquefyinggelatin is white. 3. Staphylococcus epidermidis albus (Welch) closely simulates Staphy-lococcus pyogenes albus. It is the most common micro-organism on thesurface of the body, and is often p
. A practical treatise on medical diagnosis for students and physicians . m ^ci ■^■r^:i Pus with staphylococcus. X 800. (FLrGGE.) 2. Staphylococcus Pyogenes Albus. It is also found in acute abscesses,but less often than the aureus, and is less virulent. It is morpholog-ically identical with the aureus, but develops no pigment. The surfacecultures are milky white, and the mass at the bottom of the liquefyinggelatin is white. 3. Staphylococcus epidermidis albus (Welch) closely simulates Staphy-lococcus pyogenes albus. It is the most common micro-organism on thesurface of the body, and is often present in parts of the epidermis toodeep for disinfection, save by heat. It is supposed to be the usual causeof stitch-abscess. 4. Streptococcus Pyogenes. It is found in acute abscesses, erysipelas,otitis media, puerperal metritis, infectious endocarditis, pseudodiphtheria,scarlatinal angina, and most purulent inflammations of a phlegmonouscharacter. It is the organism most commonly found in inflammationshaving a spreading tendency. Fig. Streptucuccuf pyogenes in pus. X 800. () Morphology. Cover-glass preparations show spherical cocci of varyingsizes, which form chains of 4 to 20 elements, the chains often formingtangled masses. This organism is stained basic anilines or byGrams method. (See Fig. 276.) Inoculated, it causes erysipelatous or phlegmonous inflammation. PLATE XIIl-c. FIG. 1. FIG. 2.
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