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.

State health officials say the bird flu virus was detected in a retail sample of raw milk from a dairy in Fresno, California

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.