Toronto Zoo Closes Aviaries After Bird Flu Case Detected at Southern Ontario Farm

Colorized transmission electron micrograph of Avian influenza A H5N1 viruses (seen in gold) grown in MDCK cells (seen in green) as shown in this undated handout photo. Centers for Disease Control and Prevention/Cynthia Goldsmith

The Toronto Zoo has shut down some of its bird enclosures after an avian flu case was detected at a southern Ontario poultry farm.

The zoo says the precautionary measures introduced Thursday are required in light of the case of avian influenza detected at a commercial poultry farm within 200 kilometres.