Columbia, SC (WLTX) - The operating rooms at the Dorn VA Medical Center in Columbia have reopened.

All 8 operating rooms had been closed since October after a particulate matter was found in the air filtration system.

Hospital staff looked over more than 1,000 surgeries dating back to June to see if there could have been any cases of patient infections because of the issue.

We're toldsix cases were noted, but they determined the issues in those cases were unrelated.