California health officials announced Wednesday that another batch of raw milk from Fresno-based Raw Farm has tested positive for bird flu virus, as dairy farms throughout the state continue to struggle with a widening number of outbreaks.

Bird flu was first confirmed in U.S. dairy cattle in March, and high levels of the virus have been found in the milk of infected cows.

Bird flu virus has been found in a batch of raw milk sold in California, and consumers should not drink it, the state Department of Public Health warned Sunday.