We are currently doing that. We've found several patients with MRSA nares, or other infections that way, so I'm thinking it's a good idea, as nursing homes are a high risk environment and many of the patients are immunocompromised due to age.
Basically we swab the nares, get a sputum if products, get a urine if the patient had the foley in the nursing home, and collect stool only for diarrhea. We don't routinely swab the rectum.
Do to bed crunches we are allowed to cohabitate nursing home patients that are admitted close to the same time until the cultures come back.
It usually takes three days.
We do not isolation persons in an assisted living facility.
This winter it was a huge hardship placing nursing home patients (the county I live in Florida has tons of nursing homes).
This and other isolation policies we've come up with has decreased the infection rate according to snippets in our newsletters.