You pull open the shed door or a pantry cupboard and see small dark pellets. Worry about illness is the natural next thought, and it is a fair one. Germs can ride on rodent waste, and the CDC lays out how to remove it. The central rule is easy to state: never raise dust.
What the CDC says about hantavirus.
The CDC reports that some rodents carry hantaviruses, and a person may catch one by inhaling fine particles stirred up from urine, droppings or nests. For this country the agency names four carriers: the deer mouse, cotton rat, rice rat and white-footed mouse. Cases are rare, though they can be severe.
Because you cannot tell by looking whether droppings are from a carrier, the agency treats all rodent waste with the same care. That is why the method below applies to mice and rats alike.
Before you start.
- Let fresh air in through doors and windows and keep out for about thirty minutes.
- Keep children, pets and anyone with breathing problems out of the area.
- Collect gloves, paper towels, trash bags, a spray bottle and disinfectant.
- Do not sweep, vacuum or dust the area dry.
The half hour of airing is not a formality. It lets any stale air in a closed shed or crawl space escape before you step in.
The damp method in order.
| Step. | What to do. | Why it matters. |
|---|---|---|
| 1. Air out. | Open the space for about thirty minutes. | Removes stale air. |
| 2. Glove up. | Rubber, latex or vinyl gloves. | Keeps waste off your skin. |
| 3. Soak. | Spray droppings and stains with disinfectant until wet. | Keeps dust down and begins disinfection. |
| 4. Wait. | Let it sit for about five minutes. | Gives the product time to work. |
| 5. Wipe. | Pick up with paper towels. | Removes the waste without raising dust. |
| 6. Disinfect. | Mop or sponge the area with the same product. | Treats the surfaces. |
| 7. Bag. | Seal towels, droppings and any dead rodent in a bag, then another. | Contains the waste. |
| 8. Wash. | Wash gloved hands, remove gloves, wash bare hands. | Removes any contamination. |
This table summarizes the steps in the CDC clean-up guidance, linked at the bottom of this page. Read the original before you start, particularly if the area is large.
Noises in the walls seldom fade by themselves, and a few minutes on the phone is a sensible first step.
(551) 274-5838What to avoid.
- Dry sweeping, which lifts particles into the air.
- Using a vacuum, which can blow fine dust back out.
- Handling droppings or nests with bare hands.
- Mixing bleach with other cleaners, which can release harmful fumes.
- Letting children or pets into the area before it is clean and dry.
Attics, crawl spaces and sheds.
Closed spaces concentrate dust, so they deserve extra care. If the amount of waste is large, insulation is soiled or you cannot ventilate, consider professional help. Our attic and crawl space cleanout uses wet methods and sealed bags and waits until animals are gone and openings closed.
Cleaning is not the end of the job.
If you clean and the droppings return, animals are still using the space. Sealing the entry points is the lasting fix, and the CDC prevention page, also linked below, puts it plainly: seal up, trap up, clean up. Our walk-through finds the openings first.
A note on health.
Our expertise ends at the pest side. Should you develop fever, muscle aches or breathing difficulty in the weeks after handling droppings, visit a doctor and say that rodents were involved. Waiting to see if it fades is a poor plan.
For the rules on rodent bait, which also affects safety, see the EPA page in the sources block.
Dampen first, then clean
You may tidy up before the technician comes, as long as you follow the order below and pause whenever a step confuses you.
- Resist the urge to tidy quickly with a broom, because speed and dust arrive together.
- Stale air in a shut-up crawl space or outbuilding should be replaced before you step in.
- Keep your hands covered for the entire job and wash them with soap and water when the gloves come off.
- Saturate droppings and stains with household disinfectant, or with bleach diluted as its label directs, then leave it alone for roughly five minutes.
- Double-bag anything wet, dripping or sharp before it goes in the bin.
- A fever, sore muscles or labored breathing that shows up after a cleanup means a doctor visit, with the rodent contact mentioned. Ours is a pest business, not a clinic.
See the agency pages for yourself
Each title below links to the agency page.
- CDC walkthrough for rodent cleanup tasks: A step list covering gloves, open windows, soaking, wiping and disposal.
- CDC summary on preventing hantavirus: What hantavirus is and why closing entry points lowers the chance of contact.