U.S. poultry producers should ramp up testing and monitoring of turkeys for bird flu before they are slaughtered to ensure the virus stays out of the food supply, the U.S. Department of Agriculture said on Friday.

The CDC advises testing hospitalized flu patients for bird flu within 24 hours to prevent delays in identifying human infections. While the public risk remains low, nearly 70 Americans have contracted bird flu.

Although it says the risk of bird flu contagion to the public remains low, with no evidence of human-to-human transmission, the Centers for Disease Control and Prevention is calling on hospitals to test flu