Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «T»:
Tubercular: See: Tuberculous....
Tuberculin: A protein extracted from Mycobacterium tuberculosis that is used in a skin test to determine if a person has been exposed to tuberculosis. The tuberculin preparation in most common use today is purified protein derivative (PPD) tuberculin. PPD is injected (or multiple-punctured) into the...
Tuberculosis: A highly contagious infection caused by the bacterium called Mycobacterium tuberculosis. Abbreviated TB. Tubercles (tiny lumps) are a characteristic finding in TB. Diagnosis may be made by skin test, which if positive should will be followed by a chest X-ray to determine the status (a...
Tuberculosis treatment: Treatment of tuberculosis (TB), depends upon the status of the infection and differs for dormant and active TB.
The differences are as follows:
Dormant TB: Dormant TB is characterized by a positive TB skin test, a normal chest x-ray, and no symptoms. There
are most like...
Tuberculosis vaccination: A vaccination for tuberculosis (TB). The vaccine, known as BCG (bacille Calmette Guerin), is used in most developing countries to reduce the severe consequences of TB in infants and children. However, BCG vaccine has variable efficacy in preventing the adult forms of TB and...
Tuberculosis, active: The presence of
Mycobacterium tuberculosis infection with a positive chest
X-ray. Treatment of active tuberculosis is mandatory by law
in the US. See also: Tuberculosis....
Tuberculosis, antibiotic-resistant: A variant of tuberculosis (TB) that is not affected by one or more of the antibiotics normally used to treat it. If the strain of TB is unaffected by more than one medication, it is called multidrug resistant (MDR) TB. A person with any form of
drug-resistant TB ...
Tuberculosis, avian: A type of tuberculosis affecting birds, caused by Mycobacterium avium, which may be communicated to other animals and humans....
Tuberculosis, bovine: See: Bovine tuberculosis....
Tuberculosis, dormant: The presence of evidence for tuberculosis infection from a positive TB skin test in a person with a normal chest X-ray and no symptoms. Treatment is not mandatory for dormant tuberculosis (TB), as it is with active TB, but it is a good idea because the TB can become active lat...
Tuberculosis, drug-resistant: Tuberculosis (TB) that does not respond to drug treatment.
Drug-resistant TB has become a very serious problem in recent years in certain populations. For example, TB resistant to the drug isoniazid (INH) is seen among patients from Southeast Asia. The reason for thi...
Tuberculosis, extrapulmonary: Tuberculosis that occurs outside the lungs as, for example, in the lymph nodes or kidneys....
Tuberculosis, genetic susceptibility to
Tuberculosis, genetic susceptibility to: Genes that make someone susceptible to developing tuberculosis (TB) when exposed to the bacterium (Mycobacterium tuberculosis) that causes it.
Although there are millions of new cases of TB each year, not everyone exposed to the bacterium becomes infected nor...
Tuberculosis, MDR: Multidrug-resistant tuberculosis. See: Tuberculosis, antibiotic-resistant....
Tuberculosis, miliary: The
presence of numerous sites of tuberculosis infection each
of which is minute, due to dissemination of infected
material through the bloodstream in a process somewhat like
the metastasis of a malignancy. The word "miliary" is a
botanical borrowing by medicine and refer...