The operating rooms at the Department of Veterans Affairs hospital in Columbia have closed again after dust was found in the operating room.
Officials say the dust was discovered Thursday, just four days after surgeries resumed following a nearly two-month closure of the operating rooms for a similar problem.
Authorities blamed the disintegration of a special air filter for the original problem, but before surgeries resumed, had said they felt they had thoroughly cleaned the operating rooms and fixed the situation.
Officials say the recent problem appears to have a similar cause, but their investigation continues.
Surgeries scheduled for the VA have again been moved to other hospitals in the area.