. Bacteriology in medicine and surgery. A practical manual for physicians, health officers, and students. Bacteriology. 478 BAOTEBIOLOGY. quently exceed their fellows greatly in size, especially in old cultures, when this may be considered to be the result of involution forms. (See Figs. 61, 62, 63, and 64.) They siain readily by aniline colors and by Gram's method. FlQ. 63. Fig. Streptococci from solidified serum cul- ture appearing mostly as diplococci. X 1000 diameters. Streptococcus growing in long cbains in bouillon culture. X1000 diameters. Biological Characters. Streptococci grow r
. Bacteriology in medicine and surgery. A practical manual for physicians, health officers, and students. Bacteriology. 478 BAOTEBIOLOGY. quently exceed their fellows greatly in size, especially in old cultures, when this may be considered to be the result of involution forms. (See Figs. 61, 62, 63, and 64.) They siain readily by aniline colors and by Gram's method. FlQ. 63. Fig. Streptococci from solidified serum cul- ture appearing mostly as diplococci. X 1000 diameters. Streptococcus growing in long cbains in bouillon culture. X1000 diameters. Biological Characters. Streptococci grow readily in various liquid and solid culture media. The most favorable temperature for their development is from 30° to 37° C, but they multiply freely at ordinary room-temperature—18° to 20° C. They are faculta- tive anaerobes, growing both in the presence and ab- sence of oxygen. Growth on Gelatin. Tubes of gelatin which have been inoculated with streptococci by puncture with the platinum needle show on the surface no growth beyond the point of entrance. In the depth of the gelatin on the second or third day a distinct, tiny band appears,. 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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