Modern surgery, general and operative . 7.—Ascococcus Billrothii Cohn (afterF. Cohn). The cocci are often named according to their function, as, for example,pyogenic, or pus-forming. Cocci may be named according to the color ofthe culture. The name may embody the form, arrangement, color of culture,and function; for instance. Staphylococcus pyogenes aureus signifies a roundmicro-organism, which arranges itself with its fellows in the form of a bunchof grapes, which produces pus, and which gives golden-yellow cultures. r:^ ^ t / /% 3 I*. Fig. 9.—Zooglea (Ball). Tig. 8.—Forms of cocci:—A, Diploc
Modern surgery, general and operative . 7.—Ascococcus Billrothii Cohn (afterF. Cohn). The cocci are often named according to their function, as, for example,pyogenic, or pus-forming. Cocci may be named according to the color ofthe culture. The name may embody the form, arrangement, color of culture,and function; for instance. Staphylococcus pyogenes aureus signifies a roundmicro-organism, which arranges itself with its fellows in the form of a bunchof grapes, which produces pus, and which gives golden-yellow cultures. r:^ ^ t / /% 3 I*. Fig. 9.—Zooglea (Ball). Tig. 8.—Forms of cocci:—A, Diplococci;B, staphylococci; C, streptococci. The bacilli are long, staff-shaped organisms. Long, delicate, unbranched,jointed bacilli having wavy outlines are known as leptothrix forms. Chain-likebacilli are called streptohacilli. Bacilli give origin to many surgical diseases. Dichotomy or Branching.—It is very seldom that a side bud appears uponbacteria except in the bacteria of tuberculosis and diphtheria. I a ^ COQ oaf s Q a h Fig. ^10.—Pseudodichotomy: a, In bacilli; b, in streptococci (Lehmann and Neumann). Pseudodichotomy is by no means unusual. It occurs when one end of abacillus grows by the end of the adjacent bacillus or when a bacillus in a chaindivides in a line parallel to the chain and thus begins another chain (Fig. 10). Multiplication of Bacteria.^—Bacteria multiply with great rapiditywhen placed under suitable conditions. They can multiply by transverse 24 Bacteriology fission or by spore-formation. Some
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