. A manual of bacteriology. Bacteriology. 352 MANUAL OF BACTERIOLOGY. But after it becomes accustomed to the artificial environment, it may be readily cultivated on a number of different media, though its growth is always relatively slow, as compared with that of many other bacteria. It does not grow at a tempera- ture below 29° C, and the best temperature is around 38° C. It cannot, therefore, be cultivated upon gelatin even if this were a suitable medium otherwise. It grows well upon blood-serum, where the growth becomes visible in from ten to fourteen days in. Fio. 92.—Bacillus tuberculosis
. A manual of bacteriology. Bacteriology. 352 MANUAL OF BACTERIOLOGY. But after it becomes accustomed to the artificial environment, it may be readily cultivated on a number of different media, though its growth is always relatively slow, as compared with that of many other bacteria. It does not grow at a tempera- ture below 29° C, and the best temperature is around 38° C. It cannot, therefore, be cultivated upon gelatin even if this were a suitable medium otherwise. It grows well upon blood-serum, where the growth becomes visible in from ten to fourteen days in. Fio. 92.—Bacillus tuberculosis in sputum, stained with carbol-fuchsin and methylene-blue. Photomicrograph in two colors. (X looo.) the incubator. It forms a dry, mealy, scaly mass, elevated above the surface, of a grayish-brown color. It also grows upon glycerin-agar; or glycerin-bouillon, on which it forms a pel- licle; upon potato; upon milk containing 1 per cent, of agar and upon coagulated egg (see page 76). It is important to have the medium moist. It can be cultivated from tuberculous sputum only with great difficulty. It is best to obtain it from the tissues of an animal that has died of tuberculosis, where the. 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 Williams, Herbert Upham, 1866-; Bolton, Benjamin Meade, 1857-1929. Philadelphia, P. Blakiston's Son & Co.
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