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nontuberculous

nontuberculous

1 8.1
Not caused by the germ that causes tuberculosis
  • adjective
  • /ˌnɒnˈtjuːbərkjələs/
  • Specialized
: no tuberculoso
  • A positive PPD skin test can result from nontuberculous mycobacterial infections, owing to a high degree of cross-reactivity with the tuberculosis antigen in the standard PPD.
  • nontuberculous mycobacteria

Examples

  • Patients with cervical lymphadenitis due to nontuberculous mycobacteria can present in an identical fashion and may be difficult to differentiate from those with M. tuberculosis infection.

    Academic text (1995)
  • Nontuberculous mycobacteria can cause infections in individuals with weakened immune systems.

  • The number of organisms present suggests that these are nontuberculous mycobacteria or that the patient is severely immunocompromised.

    Academic text (1995)
  • Other antimicrobial medications, such as ciprofloxacin and clarithromycin, have been used with some success for these nontuberculous organisms.

    Academic text (1995)
  • Fortunately, cervical lymphadenopathy involving nontuberculous mycobacterium almost exclusively occurs in children under 12 years of age.

    Academic text (1995)
  • AFB smear results can be useful, although they cannot differentiate between tuberculous and nontuberculous mycobacteria (Figure 2).

    Academic text (1995)
  • Nontuberculous mycobacteria (NTM) and, in particular, the Mycobacterium abscessus group are recognized as emerging respiratory pathogens among patients with cystic fibrosis.

    Academic text (2014)
  • Research indicates that nontuberculous organisms are becoming more prevalent in urban areas.

  • Healthcare providers should consider nontuberculous mycobacteria when diagnosing chronic respiratory infections.

Surface Forms

nontuberculous positive

Morphology

nontuberculous = tuberculous (transparent) = non + tuberculous

The productive negative prefix 'non-' is applied to the adjective 'tuberculous', so the meaning 'not tuberculous' is directly derivable.

Etymology

Nontuberculous starts with non- meaning 'not', and the rest comes from tubercle, a small 'lump' that gave its name to tuberculosis. So nontuberculous describes bacteria or infections that are 'not' caused by tuberculosis.