Monday, April 09, 2007

Viral Isolates Update

As you can see from the graphs below, the respiratory viral season is slowing down. We are running below 15% positivity for RSV and these upcoming weeks are expected to bring positivity rates down below 10% (the end to endemic disease). Interestingly, as RSV is on the decline, parainfluenza is increasing. We have had parainfluenza type 3 isolated in moderate numbers from most of our reporting sites. Parainfluenza type 3 is a common cause of bronchiolitis and pneumonia in infants and young children and may resemble RSV bronchiolitis. Parainfluenza types 1 and 2 are the viruses usually associated with viral croup.
We are still seeing some influenza A and B, but as with RSV, these numbers are declining as well.
Stay tuned for updated numbers and percent positive RSV to be updated later in the week.


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