Shared Flashcard Set

Details

TB
OCR AS Biology 2009
15
Biology
12th Grade
05/19/2009

Additional Biology Flashcards

 


 

Cards

Term
In what year did the WHO declare TB to be public health emergency?
Definition
1993
Term
What approximate percentage of the world's population are newly infected with TB each year?
Definition
1%
Term
What percentage of those newly infected each year go on to develop the disease?
Definition
10-15%
Term
Current estimates suggest that 30% of the world's population are infected with what?
Definition
Mycobacterium
Term
TB is particularly common in...
Definition
...South-east Asia and in sub-Saharan Africa.
Term
TB levels are rising in...
Definition
...Eastern Europe.
Term
Is TB caused by a bacterium, or a virus?
Definition
Bacterium
Term
There are two species of TB bacterium, and they are...
Definition
Mycobacterium tuberculosis and M.bovis.
Term
Where, in the body, is TB found?
Definition
Normally in the lungs.
Term
TB is transmitted by...
Definition
...droplet infection.
Term
Why hasn't 30% of the world's population got TB, if 30% are infected?
Definition
In many people it is inactive or controlled by their immune system.
Term
When is TB spread?
Definition
It is contained in tiny droplets of liquid that are released when the infected people cough, sneeze, laugh or talk.
Term
Is TB easy to contract?
Definition
No, it takes contact with an infected person to over a prolonged period of time to contract it.
Term
What makes TB spread more likely?
Definition

-Overcrowding

-Poor ventilation

-Poor health

-Poor diet

-Homelessness

-living/working with people who have migrated from areas where TB is more common.

Term
Apart from droplets of fluid, how else is it possible to contract TB?
Definition
From the milk or meat of cattle. This isn't much of a problem in developing countries.
Supporting users have an ad free experience!