. The principles of bacteriology: a practical manual for students and physicians. seen scattered through thefield very delicate stained rods, which present, inmost instances, a conspicuous beading of their pro-toplasm—that is, the staining is not homogeneous,but at tolerably regular intervals along each rod areseen alternating stained and unstained points. Theserods may be found singly, in groups of twos and threes,and sometimes in clumps consisting of large in twos or threes it is not uncommon to findthem describing an X or a V in their mode of arrange-ment, or again they may be
. The principles of bacteriology: a practical manual for students and physicians. seen scattered through thefield very delicate stained rods, which present, inmost instances, a conspicuous beading of their pro-toplasm—that is, the staining is not homogeneous,but at tolerably regular intervals along each rod areseen alternating stained and unstained points. Theserods may be found singly, in groups of twos and threes,and sometimes in clumps consisting of large in twos or threes it is not uncommon to findthem describing an X or a V in their mode of arrange-ment, or again they may be seen lying parallel the oneto the other. If contrast-stains are used, these rods will be detectedand recognized by their retaining the original colorwith which they have been stained; whereas all otherbacteria in the preparation, as well as the tissue-cellswhich are in the sputum, will take up the contrast-color. (Fig. 63.) S20 BACTERIOLOGY. This delicate beaded rod is bacillus tuberculosis. Thelancet-shaped diplococcus with the capsule is micrococcus Fig. 63. ,:N-. M .; /,. Tuberculous sputum stained by Gabbetts method. Tubercle bacilli seen asred rods; all else is stained blue. lanceolatus. The cocci grouped in fours are mioroeoccustetragenus. Inoculation Experiment.—Inoculate into thesubcutaneous tissues of a guinea-pig one of the small,white, caseous masses similar to that which has beenexamined microscopically. If death ensues, it will, inall probability, be the result of one of the three follow-ing forms of infection : a. Septicaemia resulting from the introduction intothe tissues of an organism frequently present in thesputum. It is designated variously as micrococcus ofsputum septiceemia, diplococcus pneumonice, pneumo-coccus of Fraukel, meningococcus, streptococcus lan-ceolatus Pasteuri, micrococcus lanceolatus, micrococcusPasteuri, coccus lanceolatus, bacillus salivarius septicus, 1 Septicaemia is tliat form of infection in which the blood is the chieffield of act
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