Greencore, the plant affected by the outbreak, said some of its employees are now self-isolating.
79 workers tested positive through NHS testing, while 213 positive results came from Greencore’s private testing, said Lucy Wightman, director of public health at Northamptonshire County Council.
A total of 292 people tested positive for COVID-19 during the outbreak.
Greencore said in a statement: “Due to the increasing number of COVID-19 cases in the Northampton area, we have made the decision to start proactively testing all colleagues at our Northampton site.
“We can confirm that a number of colleagues have tested positive for the virus and are now self-isolating.
“We work closely with PHE East Midlands, Northamptonshire County Council and Northampton Borough Council, who fully support the checks we have on site. ”
The company added, “In each case, we immediately performed a contact tracing and asked our potentially affected colleagues to self-isolate.
“All Greencore locations have extensive social distancing measures in place, strict hygiene procedures and regular temperature monitoring, and we are doing everything we can to keep our employees safe.
“As always, the health and well-being of our colleagues is our top priority. ”
Lucy Wightman, director of public health at Northamptonshire County Council, said employees were urged to “act now” after the number of confirmed cases in the town fell from 66 in the week ending August 2 to 85 for the week ending August 9.
She said: ‘We are working with colleagues from Greencore in Northampton after the discovery of a COVID-19 outbreak in the workplace.
“Public Health England Midlands has supported colleagues at Greencore in managing the outbreak.
“This was complemented by the support of the local infection prevention and control team and environmental health colleagues at Northampton Borough Council. ”
She added: “It is evident that Greencore has some very effective measures in place and they continue to work extremely hard to exceed the requirements necessary to be safe from COVID-19 in the workplace.
“The Borough of Northampton has seen a high number of cases over the past four weeks and residents and employees have been urged to ‘act now’ to follow additional measures, to avoid a local lockdown or further intervention of the government.
This is a banana distribution center in Coventry that is working with public health officials to contain and manage a COVID-19 outbreak.
All staff at Fyffes Group Limited, on Richardson Way, Cross Point Business Park, should be tested as a precaution after 10 staff members test positive for the virus.
Company management works closely with public health officials from Coventry City Council, Public Health England (PHE) Midlands and the Health and Safety Executive (HSE).