Aseptic surgery / by Charles Barrett Lockwood.

  • Lockwood, Charles Barrett, 1856-1914.
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: Aseptic surgery / by Charles Barrett Lockwood. Source: Wellcome Collection.

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    variable. As a rule the bacteria are short rods with rounded ends, about 0-5 /a broad and 2 /a long. Some- times coccus forms are met with. Perhaps this diversity of form indicates the existence of more than one species. Tavel and Lanz,i who have lately written an admirable monograph on peritonitis, think that the hactermm coli commune is like that wliich was formerly called bacterium termo, and therefore includes several species. The bacteriuvi coli commune grows in pairs or in short strings. Spores have not been found. It stains well with aniline dyes, and is decolorised by Gram's iodine solution. It is indifferent, and grows either in the presence or absence of free oxygen. It does not liquefy gelatine. The growth upon the surface of media is in circular colonies, which are heaped up in the centre but thin and transparent at the edge, which is irregular. The central thick part of the colony is a yellowish white, which becomes almost brown as the culture grows older. The colonies in the depth have similar characters, but are smaller and spherical. It is im- portant to note that bubbles of gas are formed in the gelatine. Variations in growth are common, so that a work like Sternberg's ^ ought to be consulted. The 1 Ueber die Aetiologie der Peritonitis, Basel, 1893, p. 160. 2 Bacteriology, New York, 1892. This is one of the clearest and most useful of the larger and more expensive works on bacteriology.