. Bacteriology in medicine and surgery. A practical manual for physicians, health officers, and students. Bacteriology. SPIRILL UM CHOLERA ASIA TICM. 571 in the zone of liquefaction, (See Figs 76 and 77.) Examined under a low-power lens, at the end of sixteen to twenty-four hours, the colonies appear as small, light yellow, round, coarsely granular disks, with a more or less irregular outline. In many cases at this stage an Fia. 76. FlQ. Cholera colonies in gelatin; Cholera colonies in gelatin; twenty-four thirty-six to forty-eight hours' hours'growth. (Dunham.) growth. X about 30 diamete
. Bacteriology in medicine and surgery. A practical manual for physicians, health officers, and students. Bacteriology. SPIRILL UM CHOLERA ASIA TICM. 571 in the zone of liquefaction, (See Figs 76 and 77.) Examined under a low-power lens, at the end of sixteen to twenty-four hours, the colonies appear as small, light yellow, round, coarsely granular disks, with a more or less irregular outline. In many cases at this stage an Fia. 76. FlQ. Cholera colonies in gelatin; Cholera colonies in gelatin; twenty-four thirty-six to forty-eight hours' hours'growth. (Dunham.) growth. X about 30 diameters. ill-defined halo is seen to surround the granular colony, which by transmitted light has a peculiar reddish tint. The older the colonies become the more the granular structure increases, until a stage is reached when the surface looks as if it were covered with little fragments of broken glass (Koch). Liquefaction continues around the colonies, their structure appears fissured and coarsely granular in texture, and occasionally a hair-like border is formed at the periphery (Fig. 78), or a gray trans- parent zone, until the entire colony breaks up into frag- ments. Sometimes the colonies may be retained as com- pact masses in the zone of liquefaction, and then they are. 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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