. Manual of bacteriology for practitioners and students, with especial references to practical methods. Bacteriology. SPIRILLA IN WATER 153 not liquefied, the colonies having a tendency to spread out over the medium in a thin superficial film. They show a dull white colour and an irregularly indented border. In thrust-cultures white buttons develop along the needle- track and a delicate film on the surface. The colonies on potato are yellow and juicy, and a white layer appears on serum. The micro-organism is also capable of growth in the absence of oxygen upon nutrient media containing grape-s
. Manual of bacteriology for practitioners and students, with especial references to practical methods. Bacteriology. SPIRILLA IN WATER 153 not liquefied, the colonies having a tendency to spread out over the medium in a thin superficial film. They show a dull white colour and an irregularly indented border. In thrust-cultures white buttons develop along the needle- track and a delicate film on the surface. The colonies on potato are yellow and juicy, and a white layer appears on serum. The micro-organism is also capable of growth in the absence of oxygen upon nutrient media containing grape-sugar, and then generates a gas consisting of hydrogen and carbon dioxide. Eabbits succumb to a subcutaneous injection in from one to three days, with the symptoms of diarrhoea and collapse. According to Gasser, an agar medium tinted with fuchsine is decolorised only by this bacterium and the bacillus of typhoid fever, whilst a sufficient point of distinction between these two is, that the growth of Bacterium coli. â PlageUa Fig. 57.âSrmiLLrji ukduia, with Flagella. Magnified 800 times. (After Lbffler.) commune remains restricted to the strip inoculated, where- as that of the typhoid bacillus forms a tolerably broad streak with very bowed and irregular edges. Spirilla in water.âSpirilla are found in copious numbers in stagnant water, and are marked by an exceedingly active motility, darting across the field with manifold twists and turns. They often lie together in clumps, which look to the naked eye like flakes of mucus. The individual spirilla possess from one and a half to four turns, or sometimes as many as six, and have some flagella on their ends. They are described as Spirillum undula (fig. 57).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Schenk, Samuel Leopold, 1840-1902. London, Longmans, Gre
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbacteri, bookyear1893
