According to Alberta Health, 24 Albertans have become ill since April 5, including 10 children.
Three adults and one child required hospitalization, but all four have since been released.
The outbreak has also been linked to illnesses in British Columbia and Saskatchewan.
The Public Health Agency of Canada says all of the cases involved contact with live baby poultry, and most have been traced back to an unnamed Alberta poultry hatchery.
Dr. James Talbot, Alberta's chief medical officer of health, says salmonella causes noticeable disease in humans but not necessarily for animals.
"They're not noticeably affected at all," he says. "You can’t look at an animal, tell it’s sick, and take precautions.”
Butterfield Acres, a popular petting zoo located northwest of Calgary, is no longer allowing patrons to have any contact with live poultry on site.
“We are taking precautions by adopting a no-touch policy for the poultry, and by restricting access to all our poultry pens," the zoo told Global Calgary. "We are asking all visitors to watch the birds through the fences, and to use this situation as an excellent reminder that good hand washing is important.”
Talbot agrees hand washing is the best way to protect against salmonella infection, emphasizing people need to “wash their hands thoroughly after contact with any livestock animal and again before consuming any food.”
Symptoms of a salmonella infection typically start six to 72 hours after exposure. They include fever, chills, diarrhea, abdominal cramps, headache, nausea and vomiting. Symptoms usually last from four to seven days.
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