Twenty recent visitors to Butterfield Acres were referred for testing through Health Link and no cases of avian flu were detected

A popular petting zoo just outside northwest Calgary limits remains closed after positive cases of avian flu were reported among its animals earlier this month.

And humans who visited the farm amid the outbreak appear to have avoided contracting the illness, according to Alberta Health Services.

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Butterfield Acres in Rocky View County has been closed to visitors since Oct. 13. AHS ordered the closure after nine cases of highly pathogenic avian influenza (HPAI) were confirmed in poultry at the facility earlier this month.

The farm, located at 254077 Rocky Ridge Rd. N.W., will remain closed until public health inspectors and medical office

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