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Eight Human Cases of A H3N2 Flu Variant Confirmed
Michigan Ag Connection - 08/22/2016

The Michigan Departments of Health and Human Services and Agriculture and Rural Development announced that there have been eight human cases of influenza A variant viruses reported in Michigan. They have tested positive for influenza A H3N2 variant (H3N2v) and one person has been hospitalized and since released. All of the confirmed cases had exposure to swine at county fairs in Muskegon, Cass, and Ingham counties during July and August where sick pigs had also been identified.

MDHHS and MDARD are working closely with local health departments, the healthcare community, and fairs to protect swine exhibitors and the public and identify any additional cases.

Fair exhibitors and animal caretakers should be following proper biosecurity processes such as regular handwashing with soap and water, disinfecting wash areas at least once each day and making sure it has time to dry thoroughly after being disinfected. Additionally, weight scales and sorting boards should also be disinfected. Use a 10 percent bleach/water mixture in combination with a detergent (dish or laundry soap) to increase effectiveness.

In 2012, there were six H3N2v cases in Michigan and in 2013 two cases were confirmed. Human infection is thought to happen when an infected pig coughs or sneezes and droplets with influenza virus land in someone's nose or mouth, or are inhaled. There also is some evidence that the virus might spread by someone touching something that has virus on it and then touching their mouth or nose.

Symptoms of H3N2v infection in people are usually mild and similar to those of seasonal flu viruses, but as with seasonal flu, complications can lead to hospitalization and death. Symptoms include fever and respiratory symptoms, such as cough and runny nose, as well as body aches, nausea, vomiting, or diarrhea. Some populations are at higher risk of developing complications if they get influenza, including children younger than five years of age, people 65 years of age and older, pregnant women, and people with certain long-term health conditions like asthma, diabetes, heart disease, weakened immune systems, and neurological or neurodevelopmental conditions.

The incubation period (the time it takes from exposure to illness) for this influenza is typically similar to seasonal influenza at about two days, but may be up to 10 days. Currently, there is no vaccine for H3N2v and the seasonal flu vaccine will not protect against H3N2v. Antiviral drugs are effective in treating H3N2v virus infections. Early treatment works best and may be especially important for people with a high risk condition.

For more information about H3N2v, visit www.cdc.gov/flu/swineflu/h3n2v-basics.htm


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