The affected meat birds and layers have been culled.
Some farmers have lost their entire flocks and are now undergoing an intensive cleaning process before beginning to rebuild their flocks.
"Six-figure sums in terms of loss of income for the companies," he said.
"The cost falls on the individual farmers so that has been quite a dramatic cost. We are talking in the region of about 130,000 birds that's out of a flock of 4.1 million.
"It's been a very traumatic situation for the farmers concerned."
The industry and government were discussing support for those impacted by the Salmonella outbreak, he said.
In response to the Salmonella detections, the Ministry for Primary Industries has tightened export requirements for poultry and is ramping up testing for all poultry producers.
The strain can cause abdominal cramps, diarrhoea, fever, headache, nausea and vomiting.
As a precaution, people should cook their eggs thoroughly, store eggs in the fridge and practice general kitchen hygiene.
- RNZ