. Bacteriology in medicine and surgery. A practical manual for physicians, health officers, and students. Bacteriology. GENERAL OHARACTEBISTIOS OF BACTERIA. 43 bacteria, however, commonly known as capsule baoteria, as shown in Fig. 2, the cell membrane or the outer layers of the membrane are so much thickened that the bacteria seem to be surrounded by a gelatinous envelope or cap- sule, which is distinguished by a diminished power of staining with the ordinary aniline dyes. The demonstra- tion of this capsule may be of help in differentiating between certain bacteria—e, g., some forms of the s
. Bacteriology in medicine and surgery. A practical manual for physicians, health officers, and students. Bacteriology. GENERAL OHARACTEBISTIOS OF BACTERIA. 43 bacteria, however, commonly known as capsule baoteria, as shown in Fig. 2, the cell membrane or the outer layers of the membrane are so much thickened that the bacteria seem to be surrounded by a gelatinous envelope or cap- sule, which is distinguished by a diminished power of staining with the ordinary aniline dyes. The demonstra- tion of this capsule may be of help in differentiating between certain bacteria—e, g., some forms of the streptococcus and pneumococcus. A peculiarity of Fig. Faintly stained flagella attached to heavily stained bacilli. the capsule bacteria is that, except very rarely, they exhibit this envelope only when grown in the animal body or in special culture media, such as liquid blood bronchial mucus, etc. ; grown on nutrient serum. gelatin, agar, or potato the capsule is only visible under very exceptional conditions, and then not distinctly. The outer surface of bacteria when occurring in the form of spheres and short rods is almost always smooth. 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 Park, William Hallock, 1863-1939; Guerard, Arthur Rose, 1851-. New York and Philadelphia, Lea Brothers & Co
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