Additional testing on samples from a Monaghan poultry farm for avian influenza, or bird flu, have come back negative, with no trace of the virus detected.
It follows initial test results on samples last night that were also negative.
There had been fears of an outbreak of the virus on the site near the border. Yesterday, samples were taken from the site and have since tested negative for the virus.
On Monday, a Department of Agriculture housing order for all poultry and captive birds came into effect, with a similar measure in place in the North. This followed the introduction of poultry biosecurity regulations in early December.
Since last December, five cases of the virus have been detected in wild birds across the country, but none so far on a commercial site.
Last week, an outbreak of bird flu was confirmed on a farm in Co Tyrone, where 64,000 birds were slaughtered to prevent the virus from spreading.
Bird flu poses a low risk to humans, and foods such as chicken and eggs are still safe to eat.
Members of the public who come across a dead or obviously sick bird are asked not to touch or handle it but report the incident via the National Disease Emergency Hotline on 01 492 8026.
Minister for Agriculture Martin Heydon has welcomed the negative test results.
He said that “while this is great relief to poultry farmers locally and indeed the whole Irish poultry sector, it is also a timely reminder of the need to take every possible step to protect our poultry”.
