. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. Micrococcus Tetragenus 329 in diameter. In cultures they do not show the regular arrange- ment in tetrads as constantly as in the blood and tissues of animals, where they occur in groups of four surrounded by a transparent gelatinous capsule. Staining.—The organisms stain well by ordinary methods and beautifully by Gram's method, by which they can best be demon- strated in tissues. Isolation.—The organism can be isolated by inoculating a white mouse with
. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. Micrococcus Tetragenus 329 in diameter. In cultures they do not show the regular arrange- ment in tetrads as constantly as in the blood and tissues of animals, where they occur in groups of four surrounded by a transparent gelatinous capsule. Staining.—The organisms stain well by ordinary methods and beautifully by Gram's method, by which they can best be demon- strated in tissues. Isolation.—The organism can be isolated by inoculating a white mouse with sputum or pus containing it, and after death recovering it from the blood. Cultivation.—It grows readily upon artificial media. At temper- atures ranging from i2°C. to 45°C., the optimum being 37°C. Colonies.—Upon gelatin plates small white colonies are produced in from twenty-four to forty-eight hours. Under the microscope. Fig. log.—Micrococcus tetragenus; colony twenty-four hours old upon the surface of an agar-agar plate. X loo (Heim). they appear spheric or elongate (lemon shaped), finely granular, and lobulated like a raspberry or mulberry. When superficial they are white and elevated, i to 2 mm. in diameter. Gelatin.—In gelatin punctures a large white surface growth takes place, but development in the puncture is very scant, the small spheric colonies usually remaining isolated. The gelatin is not liquefied. Agar-agar.—^Upon agar-agar spheric white colonies are produced. They may remain discrete or become confluent. Potato.—Upon potato a luxuriant, thick, white growth is formed. Bouillon.—A uniform clouding of the medium takes place. Acid but no gas is produced when dextrose, lactose, saccharose and mannite are added. Milk.—The milk is not changed in appearance and is not coagu- lated. Litmus milk is shghtly acidulated. Blood-serum.—The growth upon blood-serum is also abundant,. Please note that these images are extracted from scanned page image
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbacteri, bookyear1919
