A major bird flu outbreak has hit a Suffolk County poultry farm. Dozens of state and federal agricultural workers dressed in biohazard suits, sanitized boots and gloves were assisting Wednesday in the euthanizing of an entire flock of 100,

The highly infectious H5N1 strain has caused outbreaks across the country. Now, Long Island’s last duck farm must kill its entire flock and may go out of business, its owner said.

The owner of the Crescent Duck Farm in Aquebogue, N.Y., has been forced to euthanize its flock of more than 100,000 ducks due to positive bird flu tests.