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DPHHS reminds Montanans to take precautions to avoid hantavirus this spring

 


From Montana Department of Public Health and Human Services

The Department of Public Health and Human Services and local public health agencies remind Montanans and visitors to the state to be aware of the risk of hantavirus and to take precautions to avoid exposures to rodents, their droppings and nests.

“Although hantavirus infection can occur during any month, the risk of exposure is increased in the spring and summer as people clean cabins and sheds, and spend more time outside in the vicinity of rodents,” said Magdalena Scott, epidemiologist for the DPHHS Public Health and Safety Division.

Though hantavirus infections are relatively rare, 43 cases of hantavirus have been reported in Montana since its recognition in 1993. This means Montana has one of the highest rates of infection in the United States.

Early symptoms include fatigue, fever and muscle aches with progression to coughing and extreme shortness of breath. Hantavirus infection can cause severe illness; about 25 percent of Montana’s cases have resulted in death. Supportive medical care is essential to survival and, if diagnosed early, can help victims through the period of severe respiratory distress.

Studies have shown that deer mice (Peromyscus maniculatus) are the most common host of the virus, and are well-dispersed throughout Montana. People can become infected with hantavirus when saliva, urine, or droppings from an infected deer mouse are stirred up and inhaled. It is important to avoid activities that raise dust, such as sweeping or vacuuming, if there are signs of rodents in the area.

The best protection against hantavirus is to control rodent populations in the places you live and work by taking these precautions:

• SEAL UP: Prevent mouse entry into homes and sheds by sealing up holes and gaps in walls.

• TRAP UP: Use snap traps to eliminate any mice indoors. Individuals can also reduce rodent populations near dwellings by keeping shrubbery near the home well-trimmed, and moving woodpiles at least 100 feet from the dwelling and raising them at least one foot off the ground.

• CLEAN UP: Carefully clean up areas where you see mouse dropping.

• Avoid sweeping or vacuuming areas with rodent droppings and urine, as the action can stir up dust and aerosolize the droppings.

• If cleaning an area such as a cabin, camper or outbuilding, open windows and doors and air-out the space for 30 minutes prior to cleaning.

• Wear rubber or plastic gloves.

• Thoroughly spray or soak the area with a disinfectant or a mixture of bleach and water to reduce dust. Let soak for 5 minutes.

• Wipe up the droppings with a sponge or paper towel, then clean the entire area with disinfectant or bleach solution.

• When cleanup is complete, dispose of sponges and paper towels used to clean, remove and discard gloves and wash hands thoroughly with soap and warm water.

For people who think they have been exposed to hantavirus, monitoring for symptoms is vital. Anyone experiencing symptoms such as fever, muscle aches and shortness of breath after a potential rodent exposure, should see a medical provider immediately. People who have been around rodents should be sure to tell their doctor. This will alert the physician to look closely for any rodent-carried disease, such as hantavirus pulmonary syndrome.

For more information on hantavirus and prevention of disease, visit the DPHHS website at https://dphhs.mt.gov/.

 

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