Don't understand MRSA

[nur26se]

I have read about MRSA and did some googling but I am still confused.

What is the big deal about MRSA. My understanding is that MRSA is an infection that is hard to treat because of its resistance to antibiotics. So can MRSA be treated. Is MRSA scary because its harder to treat?

If MRSA is on the rise then how come we don't screen for it. How do we tell if someone has MRSA. It seems to me that more people have MRSA then they are aware of it.

Is the only way I can get MRSA is through direct contact with the organism and then the organism has to enter my skin through a wound or can I breathe it in. I don't understand how MRSA can be found in the sputum or in another area. So does MRSA just occur in one area can it spread.??

What if i do have MRSA, how will my life be affected. Can you still be a nurse..

So confused..please help