The Essentials of Practical Bacteriology; An Elementary Laboratory Book for Students and Practitioners

The Essentials of Practical Bacteriology; An Elementary Laboratory Book for Students and Practitioners

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...on the other hand, the bacilli may be 1 The beaded appearance has also been attIibuted merely to the methods of film-preparation. TUBERCULOSIS 141 considerably longer than in sputum, ' and they exhibit well-marked beading. One end may be clubbed; very rarely, and in very old cultures, one or more branches may be seen. This branched condition is, though still rare, more commonly seen in the case of fowl (or 'avian ') tuberculosis. Hueppe and his pupil Fischel1 have brought forward evidence, based on investigations as to the branching of the mammalian tuberculosis organism, which tends to show that ' the tubercle bacillus is the parasitic growth-form of a pleomorphic mould and is not a true bacterium at all. In respect to its morphology, it is closely related to the ray-fungus' (actinomyces), which they regard as an undoubted mould. Coppen Jones, in subsequently confirming these results, has made it appear likely that this mould possesses a kind of fructification resembling chlamydo-spore 2-formation (Hueppe). These views have not as yet met with general acceptance, but they will have an important bearing on the still vexed question as to the occurrence of sp0re-', formation in B. tuberculosis. ' '/1 The tubercle bacillus has a / special sheath, and on this ac-' count it resists simple methods of-. Staining; but' when once Stained' FIG. 78.--'run1mcr.E BACILLI IN caNnu it retains the c01011!' very firmly, rUGALISED DEPOSIT. X 925 even when strong decolorising From a case of urinary tuberculosis. Stained by Ziehl-Neelseu s method. (See also fig. 79.) agents, such as 25 per cent. sulphuric acid, or 33 per cent. nitric acid, are brought in contact with it. This character is made...
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Product details

  • Paperback | 108 pages
  • 189 x 246 x 6mm | 209g
  • United States
  • English
  • black & white illustrations
  • 1236817605
  • 9781236817600