Bacillus tuberculosis
Tubercle Tu"ber*cle, n. [L. tuberculum, dim. of tuber: cf. F. tubercule, OF. also tubercle. See {Tuber}.] [1913 Webster] 1. A small knoblike prominence or excrescence, whether natural or morbid; as, a tubercle on a plant; a tubercle on a bone; the tubercles appearing on the body in leprosy. [1913 Webster]

2. (Med.) A small mass or aggregation of morbid matter; especially, the deposit which accompanies scrofula or phthisis. This is composed of a hard, grayish, or yellowish, translucent or opaque matter, which gradually softens, and excites suppuration in its vicinity. It is most frequently found in the lungs, causing consumption. [1913 Webster]

{Tubercle bacillus} (Med.), a minute vegetable organism ({Mycobacterium tuberculosis}, formerly {Bacillus tuberculosis}, and also called {Koch's bacillus}) discovered by Koch, a German physician, in the sputum of consumptive patients and in tuberculous tissue. It is the causative agent of tuberculosis. [1913 Webster +PJC]


The Collaborative International Dictionary of English. 2000.

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  • Bacillus Calmette-Guérin — (or Bacille Calmette Guérin, BCG) is a vaccine against tuberculosis that is prepared from a strain of the attenuated (weakened) live bovine tuberculosis bacillus, Mycobacterium bovis , that has lost its virulence in humans by being specially… …   Wikipedia

  • bacillus Calmette-Guerin — bacillus Cal·mette Gué·rin .kal met (.)gā ran, ran n an attenuated strain of tubercle bacillus developed by repeated culture on a medium containing bile and used in preparation of tuberculosis vaccines called also bacille Calmette Guérin compare… …   Medical dictionary

  • Bacillus Cal|mette-Gué|rin — «kal MEHT gay ran», a strain of attenuated tuberculosis bacilli, used living as a vaccine (BCG vaccine) against tuberculosis. ╂[< Albert Calmette, 1863 1933, and Camille Guérin, 1872 1961, French bacteriologists, who developed it] …   Useful english dictionary

  • Tuberculosis — Tu*ber cu*lo sis, n. [NL. See {Tubercle}.] (Med.) A constitutional disease caused by infection with {Mycobacterium tuberculosis} (also called the {Tubercle bacillus}), characterized by the production of tubercles in the internal organs, and… …   The Collaborative International Dictionary of English

  • tuberculosis — [too bʉr΄kyə lō′sis, təbʉr΄kyə lō′sis] n. [ModL: see TUBERCLE & OSIS] an infectious disease caused by the tubercle bacillus and characterized by the formation of tubercles in various tissues of the body; specif., tuberculosis of the lungs;… …   English World dictionary

  • Bacillus — Cohn (Stäbchenbakterie), Gattung der Spaltpilze (Schizomyzeten), z. T. bewegliche, einzelne oder zu Fäden verbundene stäbchenförmige Bakterien, deren Längsdurchmesser den Querdurchmesser um das Zwei und Mehrfache (Kurzstäbchen [früher Bacterium… …   Meyers Großes Konversations-Lexikon

  • tuberculosis — (n.) 1860, from Modern Latin, from L. tuberculum small swelling, pimple, dim. of tuber lump (see TUBER (Cf. tuber)) + OSIS (Cf. osis), a suffix of Greek origin. So called in reference to the tubercules which form in the lungs. Originally in… …   Etymology dictionary

  • tuberculosis — /too berr kyeuh loh sis, tyoo /, n. Pathol. 1. an infectious disease that may affect almost any tissue of the body, esp. the lungs, caused by the organism Mycobacterium tuberculosis, and characterized by tubercles. 2. this disease when affecting… …   Universalium

  • Tuberculosis — A highly contagious infection caused by the bacterium called Mycobacterium tuberculosis. Tubercles (tiny lumps) are a characteristic finding. Diagnosis may be made by skin test, which if positive should will be followed by a chest X ray to… …   Medical dictionary

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