Card Set Information
The cause,symptoms, transmission and course of infection.
of disease is Tuberculosis?
It can affect any part of the body, but is usually found in the
AS THESE ARE THE
FIRST SITE OF INFECTION
people does TB
2 million people
TB is caused by
1 of 2 rod-shaped BACTERIA
, what are they called?
Mycobacterium Tuberculosis OR
Mycobacterium Bovis <-- found in cattle
What are the
of Pulmonary Tuberculosis?
- Tiredness (fatigue)
Shortness of breath
- lack of appetite-which leads to weight loss
- When the disease develops-
coughing up blood.
How is Pulmonary Tuberculosis
air by droplets
they are released into the air when the infected person coughs, sneezes, laughs or even talks.
Mycobacterium Tuberculosis is a RESISTANT bacterium, but
how long can it survive
it takes frequent contact with a person with TB to contract the disease
, which people are at most risk?
Family and close friends- not just people in the street.
Who else is at greater risk of getting TB?
People who are from
countries where TB
is common, and
people with REDUCED
Who are those with
The very young or very old
Those with AIDS
Those with OTHER medical conditions
Alcoholics and injected-drug users
In these case, TB is an
Once the Mycobacterium tuberculosis has been inhaled by someone not immune to it it takes this course....
grow and divide
in the UPPER regions of the lungs...WHY?
There is a
plentiful supply of OXYGEN
in the upper regions of the lungs.
body's immune system
responds to the TB bacterium, what do the
WHITE BLOOD CELLS
They accumulate at the site of infection as
the Mycobacterium Tuberculosis
As a result of the immune response, what happens to the
They ENLARGE and get INFLAMED.
What does this inflammation and enlargement of the lymph nodes lead to?
that area of the lungs
What is this called
(the drainage of that area of the lungs due to the enlargement and inflammation of the lymph nodes)?
-and. it usually occurs in kids
In HEALTHY people, how long does it take for the infection to be CONTROLLED?
a FEW WEEKS.
BUT...some bacteria usually remain.
When the bacteria
many years later and causes a
SECOND INFECTION of TB
(usually occurs in adults)
What is the
course of infection
for post-primary TB?
arises in the upper regions of the lungs
, HOWEVER, it is
not so easily controlled because the bacteria DESTROY THE TISSUE OF THE LUNGS
What is the
lung tissue being destroyed?
It results in
here the lungs repair itself, SCAR TISSUE
What could happen if the TB
doesn't get treated
It could spread to the
rest of the body
and can be
What is the MAIN biological PREVENTATIVE measure against TB?
- children in the UK are routinely tested for their immunity to TB.
Giving Vaccination to people who are ALREADY IMMUNE to TB is
dangerous and uneccessary.
What are those people who are NOT immune to TB given in their vaccine?
Why a weakened strain of Mycobacterium Bovis?
Weakening the bacteria means that it is
LESS LIKELY to cause the SYMPTOMS of TB
ocial and economic measures
that can be introduced to REDUCE THE NO' OF TB CASES...what are they?
about TB -especially the importance of completing the whole drug course.
MORE and BETTER housing
better HEALTH facilities and TREATMENT.
peoples immune systems don't weaken as a result of poor nutrition)
What is another means of controlling TB?
What is often the
with drug treatment?
They have to be taken for a
development of strains of M. Tuberculosis that no longer respond to drugs
Despite all these measures, there has been a
RECENT INCREASE in the no' of cases of TB in many developing countries
strains of M. Tuberculosis that don't respond to drugs
no' of people
larger proportion of
in the population