There have been 72 staff of the FTSE 250 company that have tested positive for COVID-19 out of 701, according to Nottinghamshire County Council.
Out of those to have caught the virus, 33 cases are historic and those people have been able to return to work at the Newark factory, which supplies desserts such as éclairs, doughnuts, tarts and slices, trifles and profiteroles to the likes of Tesco and Waitrose.
Testing will run until Wednesday to allow all 1,600 employees at the factory to be tested.
Shona Taylor, a Bakkavor director, said the testing programme “has been positively received, and colleagues have been supportive and reassured that every effort is being taken to ensure their safety”.
Broker Peel Hunt noted that the plant is operating largely as normal and the outbreak is seen as a local community outbreak rather than a Bakkavor issue.
Peel Hunt analysts drew attention to the trading update from Marks & Spencer, which is Bakkavor’s second-largest customer, contributing almost a quarter of sales.
The M&S statement shows “an encouraging trend” in food, with like-for-like sales of 2.5% for the past 13 weeks, or 10.6% if excluding the closure of hospitality and travel franchise units, which compares to a decline of 8.8% for the six weeks to mid May.
Bakkavor shares were down 1.5% to 66.66p by late Tuesday morning.