( CNN ) -- A poultry facility in southwest Missouri was quarantined after the discovery of a suspected case of bird flu , officials said . `` As a precaution , the poultry facility has been quarantined following preliminary results obtained during routine testing , '' the Missouri Department of Agriculture said in a news release . Additional tests will authenticate the viral disease at the Polk County facility , the state said Wednesday , adding that it is extremely rare for humans to be affected by this type of bird flu . Cargill Corp. will euthanize up to 15,000 younger birds exposed to older turkeys that tested positive for bird flu antibodies , said Mike Martin , director of communications for the company . Martin said Thursday the older birds are being harvested at another Missouri location . Their meat poses no health risk , he said . Flocks within six miles of the facility are being tested . Test results may be back as early as Friday , Cargill said . `` At the time the tests were conducted , the birds had no symptoms of the avian influenza . However , the antibodies mean at some time , the animal immune systems responded to the avian influenza , '' Martin said . `` The flu could have been present in the water , ground , air or transmitted by other migrating birds . '' Cargill owns the birds but uses the farm under a contract , he said . `` This flu is not transferable to humans , '' Martin said . `` The real concern is for animals and the flu not being spread to other animal herds . '' The U.S Agriculture Department is monitoring the situation .
Probable case of bird flu found during routine testing at southwest Missouri facility . Poultry facility is under quarantine during investigation . State says it is extremely rare for humans to be affected by this type of bird flu . Cargill Corp. says it will euthanize up to 15,000 turkeys .