Local Infectious Disease Trends Throughout Idaho
Updated February 3, 2012
- Onset of RSV season in Idaho was the week ending January 21. Onset of RSV season is defined by CDC as the first of two consecutive weeks with greater than 10% of tests positive. Numbers of RSV cases have been low throughout the winter, as this appears to be a mild RSV season.
- Hospitalizations for respiratory illnesses and bronchiolitis are due to a variety of viruses currently with adenovirus in greatest number.
- Influenza serotypes this season are the same as the previous two years: H3 N2, pandemic 2009 H1N1, and B. The 2011 flu vaccine is well matched to the circulating serotypes. Since the majority of flu cases may be later this winter and spring, we recommend continuing to immunize with flu vaccine both high-risk and anyone over age 6 months who does not have a contraindication to flu vaccine.
- CDC is encouraging forwarding of influenza specimens through the Idaho State Laboratory. A variant H3N2 derived from swine influenza has been transmitted between children, but the variant H3N2 has not been detected in the West or Northwest regions.
- Pertussis gets ignored during winter respiratory virus season, but cases continue to be diagnosed when testing is ordered. Most cases of pertussis are missed until unimmunized infants develop severe whooping cough, so remember to test for pertussis in atypical respiratory cases.
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