Tens of thousands of University of California physician assistants, optometrists, and other health care workers and custodial employees went on strike Wednesday over alleged unfair labor practices and staff shortages.

Thousands of University of California workers have gone on strike across the state over what they say are unfair labor practices at the university.

California's only lab that can confirm lethal bird flu in poultry is shifting some testing to facilities out of state due to a workers' strike, but does not expect testing delays, the University of California said on Wednesday.