MRSA is everywhere, not just in patient care environments. In fact, the Community-Acquired MRSA strains are typically more pathogenic than the hospital-acquired strains because of an additional virulence genes such as pvl. Fortunately, most are still susceptible to bactrim and clindamycin.
http://www.uwlax.edu/urc/JUR-online/PDF/2005/moore.pdf
http://en.wikipedia.org/wiki/Panton-...ine_leukocidin
Colonization rates are high among a variety of groups, including health care workers, young children, incarcerated persons, residents of LTC facilities and MSM (men who have sex with men). Outbreaks have been described among athletes, prisoners and other groups who have close contact without the benefit of stringent hygeine standards.
It became a joke at my hospital every time we had another admission of a young child for a MRSA abscess in the perineal area "Another butt abscess- not mine!" or "At least I'm not here tomorrow so I don't have to pull out the packing".
I wish to emphasize that "Direct or indirect exposure to an institutional health-care setting in which MRSA is likely to be found and other risk factors typically associated with MRSA colonization are strikingly absent from the recently described cases in which MRSA seems to have been acquired from a community reservoir"
Source:
http://www.medscape.com/viewarticle/414383
To make the assumption that having one co-worker who tested MRSA positive means that the rest of his/her collegues need to be informed and tested is not epidemiologically sound. That being said, I empathize with the fact that this situation has caused you so much worry.
The following member says Thank You: