There are six cattle herds where Shamonda virus (SHAV) infection is suspected or has been reported by a private animal health laboratory, the Department of Agriculture has said.
There have been two herds in Cork, and one herd in each of Kerry, Kildare, Wexford and Waterford.
The disease was first confirmed in Ireland at the beginning of October, having swept across Europe during the summer months at a rapid rate.
It was first confirmed in a human in France two weeks ago.
Biting midges
The disease is spread by biting midges and is closely related to Schmallenberg virus.
Signs of the disease include fever, diarrhoea, lethargy and reduced milk production.
The Department is advising farmers who suspect the disease in their animals to contact their private veterinary practitioner for advice, which may include sampling and testing as appropriate.
Although Shamonda virus is not currently notifiable at national or EU level, the Department said that reporting and investigation of suspected cases can provide valuable information to support surveillance and monitor the evolving disease situation.