(MSC News)--Cattle at two commercial dairy farms in Kansas have tested positive for avian flu.

The Kansas Department of Agriculture, in a release, says the risk to the public remains low because initial testing suggests mammals cannot spread the virus to other mammals.

At this stage, KDA says is not concerned about the safety of commercial milk or risk to consumer health because the pasteurization process kills bacteria and viruses.

State officials say people should avoid unpasteurized milk, and dairy farmers should keep a close watch on their herds.

It- the first time the bird flu has been documented in commercial dairy farms in Kansas. Cattle in Texas and New Mexico have also tested positive.