Do any one knw alot of information about MRSA?

[supermom]

I had triplets in 2008 2 boys and a girl and my husband has two step daughter who r 5 and 6. Resently i had a baby who was born at 25wk 6 days while she was in the hospital i notice that after 3 days o birth they move her incubator to a different area and the nurses inform me that she had mrsa bacteria ive heard about mrsa but i have not knw that anyone i knw had it. The nurses assure me that she is okay. Im thinking about my other kids who were also born in the same hospital if they got it to. Months before i had my baby i took one of my triplets to the doctor because she had like a boil on her vagina which first looked like a bite they gave me amoxicillin to rub on it and it went away but now looks like its coming back when i change her diaper. Also when i was pregnant i notice the same bumps on my breast and my husband said saw it on his 6 year old daughter which we all took lightly because my triplet doctor didnt say it was mrsa. What i want to knw is should i be worried? I am constantly cleaning its driving me nuts. My other question is what precaution should i take when it comes to this mrsa?