Slides in this set
What is lung disease?
Lung disease is any disease or disorder that
occurs in the lungs or that causes the lungs to
not work properly.
There are three main types of lung disease:
· Airway diseases
· Lung tissue diseases
· Lung circulation diseases…read more
Pulmonary tuberculosis (TB) is a contagious bacterial
infection that involves the lungs, but may spread to
Pulmonary tuberculosis (TB) is caused by the bacteria
Mycobacterium tuberculosis (M. tuberculosis).
People who are elderly, infants or have weakened
immune systems for example due to AIDS,
chemotherapy or diabetes, are at higher risk for active
Transmission of tuberculosis
Pulmonary tuberculosis is spread through the air by droplets,
released into the air when infected individuals cough, sneeze,
laugh or even talk. M. tuberculosis is a resistant bacterium that
can survive several weeks once the droplets have dried. TB can
also be spread from cows to humans as the milk could contain the
People who are at greater risk of contracting TB, are people who:
· Are in close contact with infected individuals over long periods
· Work or reside in long-term care facilities where large numbers
of people live close together, ie prisons, hospitals or old people'
· Are from countries where TB is common…read more
What is fibrosis?
Pulmonary fibrosis occurs when scars form on the
epithelium of the lungs, causing them to become
To diffuse respiratory gases, the linings of the alveoli
need to be thin, however for the patients with fibrosis,
oxygen cannot efficiently diffuse into the blood, as the
diffusion pathway has been lengthened and the volume
of air that the lungs can contain has been reduced.
The fibrosis can also affect the elasticity of the lungs.
This means that it is more difficult to breathe out and
therefore ventilate the lungs.…read more