bacillus

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Related to tubercle bacillus: Mycobacterium tuberculosis, tuberculosis

bacillus

(bəsĭl`əs), any rod-shaped bacterium or, more particularly, a rod-shaped bacterium of the genus Bacillus. Some bacterium in the genus cause disease, for example B. anthracis is the cause of anthraxanthrax
, acute infectious disease of animals that can be secondarily transmitted to humans. It is caused by a bacterium (Bacillus anthracis) that primarily affects sheep, horses, hogs, cattle, and goats and is almost always fatal in animals.
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; others are useful in the production of antibioticsantibiotic,
any of a variety of substances, usually obtained from microorganisms, that inhibit the growth of or destroy certain other microorganisms. Types of Antibiotics
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 (e.g., gramicidingramicidin
, antibiotic obtained from the bacterial species Bacillus brevis, which is found in soil. Gramicidin is particularly effective against gram-positive bacteria (see Gram's stain).
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 and bacitracinbacitracin
, antibiotic produced by a strain of the bacterial species Bacillus subtilis. It is widely used for topical therapy such as for skin and eye infections; it is effective against gram-positive bacteria, including strains of staphylococcus that are resistant to
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). Many organisms earlier classified as Bacillus species are now placed in different genera but continue to be referred to as baccili.

bacillus

[bə′sil·əs]
(microbiology)
Any rod-shaped bacterium.

Bacillus

[bə′sil·əs]
(microbiology)
A genus of bacteria in the family Bacillaceae; rod-shaped cells are aerobes or facultative anaerobes and usually produce catalase.
References in periodicals archive ?
Because it thrives best in the abundance of oxygen in the lungs, the tubercle bacillus prefers invading the lungs.
Dyer, a science writer, takes us from the mummies of ancient Egypt, with their visible signs of TB, to the skepticism that met Robert Koch's discovery of the tubercle bacillus, to today's global TB public health emergency.
Small children in these lands often carry the tubercle bacillus, Margaret K.
On March 24, 1882, Robert Koch announced that he had isolated the tubercle bacillus, proving for the first time that the disease, then known as consumption, was caused by a germ.
He worked on rabies with Pierre Roux and on the tubercle bacillus under Robert Koch in Germany.