Friday, August 19, 2016

CDC FluView: Ohio Adds A 3rd H3N2v Case


In addition to the six new H3N2v cases announced overnight by the state of Michigan (see Michigan H3N2v Cases Rise To 8) today's FluView report from the CDC adds 1 additional case from Ohio in week 32. 

This brings to 11 (8 Michigan, 3 Ohio) the number of cases reported in the past two weeks, all linked to swine exposure at county fairs.

Earlier this week the CDC released Interim Guidance for Clinicians on Human Infections with Variant Influenza Viruses and those with plans to attend state and local fairs this summer and fall will want to review advice from the CDC On Protecting Against Swine Variant Viruses.

This from today's FluView report.

Novel Influenza A Viruses:

Seven human infections with novel influenza A viruses were detected in two states (Michigan [6] and Ohio [1]) were reported during week 32. All seven persons were infected with influenza A (H3N2) variant (H3N2v) viruses and reported exposure to swine in fair settings during the week preceding illness onset. No human-to-human transmission has been identified and separate swine exposure events at fairs in each state are associated with infection. There is no indication that the cases in different states are related. Public health and agriculture officials are investigating the extent of disease among humans and swine, and additional cases may be identified as the investigation continues. A total of 11 (Michigan [8] and Ohio [3]) human infections with H3N2v viruses have been identified in 2016.

Early identification and investigation of human infections with novel influenza A viruses are critical to ensure timely risk assessment and so that appropriate public health measures can be taken. Additional information on influenza in swine, variant influenza infection in humans, and strategies to interact safely with swine can be found at

And if you missed them, some recent blogs on H3N2v and other swine variant influenza viruses include:

J.Infect. Dis.: Exhibition Swine As A `Unique Reservoir' Of Novel Flu
CDC Statement On H3N2v Cases In Michigan and Ohio

Sci Rpts: Transmission & Pathogenicity Of Novel Swine Flu Reassortant Viruses


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