atypical mycobacterium tuberculosis contagious

Tuberculosis (TB) is a potentially fatal contagious disease that atypical mycobacterium tuberculosis contagious can affect almost any part of the body but is mainly an infection of the lungs. It is caused by a bacterial microorganism, the tubercle bacillus or Mycobacterium tuberculosis. Although TB can be treated, cured, and can be prevented if persons at risk take certain drugs, scientists have never come close to wiping it out. Few diseases have caused so much distressing illness for centuries and claimed so many lives.

atypical mycobacterium tuberculosis contagious

Tuberculosis was popularly known as consumption for a long time. Scientists know it as an infection caused by M. tuberculosis. In 1882, the microbiologist Robert Koch discovered the tubercle bacillus, at a time when one of every seven deaths in Europe was caused by TB. Because antibiotics were unknown, the only means of controlling the spread of infection was to isolate patients in private sanitoria or hospitals limited to patients with TB—a practice that continues to this day in many countries. The net effect of this pattern of treatment was to separate the study of tuberculosis from mainstream medicine. Entire organizations were set up to study not only the disease as it affected individual patients, but its impact on the society as a whole. At the turn of the twentieth century more than 80% of the population in the United States were infected before age 20, and tuberculosis was the single most common cause of death. By 1938 there were more than 700 TB hospitals in this country.

atypical mycobacterium tuberculosis contagious
Atypical mycobacteria can cause a wide variety of infections such as abscesses, septic arthritis, and osteomyelitis (bone infection). They can also infect the lungs, lymph nodes, gastrointestinal tract, skin, and soft tissues.
There are many different species of mycobacterium other than tuberculosis (Mycobacterium tuberculosis). Some of the most common are listed below:

Mycobacterium avium-intracellulare frequently affects AIDS patients and causes lung disease.
Mycobacterium marinum cause skin infections and is also responsible for swimming pool granuloma.
Mycobacterium ulcerans cause skin infections.
Mycobacterium kansasii causes lung disease.

The rate of atypical mycobacterial infections is rare, but it is increasing as the AIDS population grows. Populations at risk include individuals who have lung disease and weakened immune systems (immunosuppression).
What is atypical tuberculosis (TB) non-tuberculous mycobacteria (NTM) or Mycobacterium Other Than Tuberculosis (MOTT) infection? How is it treated?

A. The term “Atypical TB” may be used to signify a group of closely related diseases caused by bacterial organisms belonging to non-tuberculous mycobacteria (NTM) or Mycobacterium Other Than Tuberculosis (MOTT). Although they share some common characteristics to the bacteria casing TB namely Mycobacterium tuberculosis, there are significant differences in the spectrum of diseases (e.g. incidence of extra-pulmonary disease such as skin, lymph node, disseminated disease, intestinal involvement, catheter related infections), patient characteristics (e.g. immunocompromised conditions due to HIV or chemotherapy), presentation, clinical course and outcome of disease (e.g. chest infection due to MOTT), specific drug, (e.g. need of macrolides such as Clarithromycin in regimens) and duration of treatment (e.g. longer duration of treatment~ 2 years, in chest infection). MOTT or NTM is not a single organism or a group, but consists of a diverse group of related organisms all belonging to the genus Mycobacteria. Although all of them are acid-fast bacilli, and may closely resemble M. tuberculosis when examined microscopically, atypical mycobacterium tuberculosis contagious they differ from each other in their growth requirements and growth characteristics on culture (e.g. need of light to produce pigments photochromogens, as opposed to scotochromogens, and non-chromogens), time required to grow in culture media (e.g. rapid growers generally grow within a week) and biochemical and genetic characteristics.


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