Another eight staff in a meat plant in Co Tipperary have tested positive for COVID-19.
One case was identified in ABP's processing factory in Cahir last week.
The eight new cases have been confirmed after close contacts of that worker were tested.
ABP says it will now begin to test all staff members in the facility.
In a statement, the company said: "The testing will be carried out by a private company in conjunction with the HSE to alleviate the pressure on local COVID-19 testing at this time. It is expected that the testing will commence in the next 24 hours.
"The health and safety of staff, suppliers, customers and the local community is of paramount importance.
"The company will continue to work proactively and take direction from both the HSE and HSA."
Separately, it is reported there has been a cluster identified at a direct provision centre in Co Wicklow.
The Movement of Asylum Seekers in Ireland (MASI) says it has been detected in the Esplanade Hotel in Bray.
The group has posted a letter from the HSE saying residents residents will now be tested and they should restrict their movements.
MASI spokesperson Bulelani Mfaco said the new cluster is a big concern.
He said: "We have been concerned about clusters breaking out in direct provision centres across the country since the beginning of this pandemic.
"What we are seeing now is not going to change until the Government changes the living conditions of people in direct provision centres."
