Operations at an Edinburgh hospital had to be postponed after flies from a pigeon carcass were found in operating theatres.
Two theatres at the Royal Infirmary had to be closed for a total of 11 days while they were deep cleaned and tested before reopening.
The hospital is run by Consort, who have been criticised by NHS Lothian after a series of incidents.
In April, the health board’s executive director Alan Boyter said he was "angry and frustrated" after their repeated failures.
It came after maintenance staff turned off the lights in an operating theatre while an operation was being carried out.
For a week at the start of February, smoke alarms in ten operating theatres were broken but no one told NHS Lothan. In January, it came out Consort had cleared 580 staff to work without carrying out background checks.
According to the Edinburgh Evening News, hospital staff spotted flies in two operating theatres where orthopaedic operations were carried out. The first theatre was shut on June 18 and another closed three days later. Both reopened on June 25.
Jackie Sansbury, chief operating officer for NHS Lothian, said the theatres had been deep cleaned and safety tests were carried out before they reopened.
She said: "The immediate response to these issues ensured that patient safety was not compromised."
A spokesman for Consort said: "Consort fully supports the comments and actions of NHS Lothian. Going forward, we will continue to monitor the situation"”
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