atypical mycobacterium

atypical Mycobacterium

Etymology: Gk, a + typos, without type, mykes, fungus, bakterion, small staff
a group of mycobacteria, including pathogenic and nonpathogenic forms, that are classified according to their ability to produce pigments, growth characteristics, and reactions to chemical tests. Mycobacteria, nontuberculosis (atypical) does not require isolation precautions.

atypical mycobacterium

Any Mycobacterium species exclusive of M lepra, M tuberculosis or M bovis—the latter two of which cause “typical” tuberculosis. Atypical mycobacteria are so designated because they grow more rapidly, produce heat-stable catalase, do not produce niacin or reduce nitrates, and are usually resistant to isoniazid.

atypical mycobacterium

Any Mycobacterium spp exclusive of M lepra, M tuberculosum, or M bovis–the latter 2 of which cause 'typical' TB; AM are so designated because they grow more rapidly, produce no niacin, don't reduce nitrates, produce heat-stable catalase,and are usually resistant to isoniazid. See Atypical mycobacterial infection, Multidrug-resistant tuberculosis.
References in periodicals archive ?
Atypical Mycobacterium furunculosis occurring after pedicures.
Inoculation of the atypical mycobacterium into the host occurs usually from a traumatic break in the skin.
As reported by Hurst et al, (2) Aronson was the first to isolate an atypical mycobacterium in 1926.
Dual infection with an atypical mycobacterium and M tuberculosis has previously been reported only in lymphadenopathy specimens.
Dual infection with atypical mycobacterium, and M tuberculosis is rare and may be resistant to standard antituberculous drugs.
In pilot phase II studies involving five patients, MiKasome therapy was able to resolve underlying Mycobacterium tuberculosis infections in three adults with tuberculosis and two children with atypical Mycobacterium infections, all of whom had failed conventional therapies.
Atypical mycobacterium lymphadenitis generally shows unilateral lymph node involvement; however, the patient reported here had bilateral lymphadenitis complicated by retropharyngeal abscesses.
Risk factors for atypical Mycobacterium tuberculosis in 678 Beijing strain-infected persons with tuberculosis, Vietnam and the Netherlands No.

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