The bird flu virus was detected in a retail sample of raw milk from a dairy in Fresno, California, state health officials said. The sample obtained at a store tested positive Nov. 21 during routine screening by Santa Clara County health officers,

The H5N1 virus was found in a sample of unpasteurized milk at a store, prompting a recall of one batch. Health agencies have warned against the growing dietary fad.

Bird flu has been detected in a batch of raw milk sold in California stores and the state’s department of public health said Sunday that the public should not drink it.