Two Mice Test Positive for Hantavirus

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County environmental health officials reminded people Friday to be careful whenever they find rodents after two mice caught recently in routine trapping tested positive for the potentially-deadly hantavirus.

A California mouse trapped in Campo and a western harvest mouse trapped in Poway both tested positive for hantavirus, which can cause a very dangerous disease — hantavirus pulmonary syndrome.

Environmental health officials said rodents rarely pose a threat to people as long as those rodents remain in the wild and outside of people’s homes. They also said that the common house mouse, the species most likely to be found in urban areas, does not carry the disease.

However, they said that people can come into contact with infected rodents in rural, backcountry areas or urban canyons and that people should always be careful if they find rodents in their homes, sheds, or garages.

“The best way to make sure you don’t get exposed is to keep rodents out of your house — don’t come in contact with them — seal up any holes larger than a dime,” said Environmental Health Director Jack Miller. “If you do find rodent infestations, remember not to sweep or vacuum up, because hantavirus is an airborne disease. Use ‘wet-cleaning’ methods to protect yourself.”

Wild rodents, most notably deer mice, can carry hantavirus and shed it through their saliva, urine and feces. People can breathe in the virus if infected dust from droppings and nesting materials is stirred up and becomes airborne.

Hantavirus pulmonary syndrome starts with flu-like symptoms but can grow into severe breathing difficulties that can kill. There is no vaccine, cure or specific treatment for hantavirus pulmonary syndrome, and the National Centers for Disease Control and Prevention (CDC) report that it kills 38 percent of the people who get it.

How to Avoid Exposure to Hantavirus:

Wet-cleaning Methods:

For more information, contact the County Department of Environmental Health (DEH) at (858) 694-2888 or visit the DEH hantavirus Web page.

 

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