There is a big difference in being ''infected'' and being ''colonised'' with MRSA. Infected patients usually means it is internal, such as in
trauma wounds, leg ulcers or occasionally surgical/orthopaedic wounds. Colonised is when it is on the exterior of the body, usually in the warm moist
areas like the nose, axila, groin etc and in most cases is harmless to the person who is colonised.
Staph A. like most viruses, ie E. Coli are 'natural' and are around us and with us in our everday lives and most people will never
come to any harm or even be aware that they are there.
I work as a nurse on a Trauma & Orthopaedic ward and so I work with patients that are infected or are colonised with MRSA. We routinely as part of the
initial patient assessment process take nasal and groin swabs to be screened for MRSA. The results are available normally within 3 days. This has been
routine for a number of years now, though I do remember when it wasnt.
I personally would say (though i do not have figures to prove this) that approximately 20-35% of the UK patient population are colonised with MRSA
prior to admission to hospital. If results show that they are colonised, they are isolated and a 5 day 'de-colonisation' program is started. On day
5 a reswab is done and a further 3 days are needed for the results to see if they are clear. Normally this is enough to de-colonise them but on
occasion a 2nd treatment is neccessary.
I hope that explains things a little more.


