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St. Mary’s Hospital and UW Hospital have treated nine patients with possible or suspected enterovirus D68, a bug that has caused more than 100 confirmed cases of respiratory illness the past month in 10 states.

Samples from eight patients at St. Mary’s were sent within the past week to the Centers for Disease Control and Prevention to see if they have the virus, Ellen Smith, a nurse epidemiologist at St. Mary’s, said Monday.

The St. Mary’s patients, ranging from days old to 13 years, tested positive for enteroviruses or rhinoviruses in general and had symptoms, such as difficulty breathing, that could indicate the D68 strain, Smith said.

Most of the St. Mary’s patients, seen within the past two weeks, were treated and released, she said.

Samples from one UW patient with suspected enterovirus D68 were sent to the CDC late last week, said Dr. Nasia Safdar, an infectious diseases specialist at UW Hospital.

Safdar wouldn’t say if the UW patient is a child or adult. Infants, children and teenagers are most likely to get infected with enteroviruses and become ill, the CDC says.