Mice

See our resources to detect and prevent mice.

Overview

  • Mice are a public health risk and can cause property damage.
  • We explain how to find and prevent mice in hotels, motels and other lodging.

In this section

gray mouse

Identification

House mouse

House mouse sitting on paint can

 

What to know:

  • Most common type
  • Round shape
  • Gray, tan brown with lighter belly
  • Body is 2.5 to 3.75 inches long

Deer mouse

Deer mouse on tree stump

 

What to know:

  • Gray or brown with white underbelly and small legs.
  • Body is 2 to 3.5 inches long.
  • Tail is as long as body and has a color difference between the top and bottom.

White-footed deer mouse

White-footed deer mouse by leaves and tree roots

 

What to know:

  • Gray/brown color with white belly and legs.
  • Larger hind legs.
  • Bicolored tail.
  • Body is 3 to 4 inches long.

Problems mice cause

Public health risks

  • Mice can carry ticks and fleas.
  • Mice contaminate food, food packaging and surfaces in a business.
  • People can get sick by coming into contact with mice urine, feces, saliva, and nesting materials while cleaning or breathing in airborne particles.
  • Improper cleaning of mice droppings and urine can lead to illness.

Transmissible diseases

  • Hanta virus
  • Salmonellosis
  • Tapeworms
  • Plague

Damage and contamination

  • Mice can cause property damage by gnawing on wires, furniture and clothing.
  • Mice urinate, poop and gnaw as they move throughout the building or house. An average mouse can produce 50 droppings a day.
  • Mice walk over and contaminate food surfaces.

Traits

  • Mice are highly adaptable. They can be found in multiple environments and building types.
  • Mice reproduce very quickly. Adult females can have up to 30 to 35 offspring per year.
  • Mice can squeeze through holes 1/4 of an inch or bigger, jump 12 inches and are great climbers.
  • Mice often come into buildings and houses when temperatures get colder and there is little food outside.

Infestation

Signs:

  • Mouse droppings throughout facility
  • Urine staining (use a blacklight for better visibility)
  • Gnawed doorways and/or food packaging (look for spilled foods)
  • Mouse tracks in areas with heavy debris, dust or mud
  • Rub marks on walls in heavily traveled areas
  • Musty, pungent odor

Prevention

Exterior

  • Seal all holes or gaps with areas larger than 1/4 inch on outside of buildings.
  • Create a 3-foot clearing around exterior walls of building. Adding a gravel strip may help.
  • Maintain outdoor areas clean and free of clutter.
  • Keep lids to disposal bins closed.
  • Keep bushes and shrubbery trimmed.

Interior

Watch for signs of mouse activity as seasons change and monitor any troublesome areas.

Cleaning

  • Remove cardboard and clutter from rooms to avoid harborage conditions.
  • Maintain areas free of food debris

Physical facilities

  • Seal all electrical conduits, heating ducts, pipes, and pipe chases.
  • Install door sweeps and other devices to seal any holes or cracks leading to outside.
  • Provide routine maintenance and spot checks to all areas of building to prevent mice getting in.

Pest control

  • Work with pest control company to determine a regular schedule that fits your building.
  • Call a professional extermination company if you suspect there are mice within your facility.

 

Contact us

Environmental Health

Minneapolis Health Department

Phone

612-673-2301

Address

Public Service Building
505 Fourth Ave. S., Room 520
Minneapolis, MN 55415