Hantavirus and Rodents in Central Texas: Symptoms, Risk, and Safe Cleanup
If you have found rodent droppings in your attic, garage, shed, or crawlspace, the most important thing to know is this: do not sweep them and do not vacuum them. That single action is the most common way people are exposed to hantavirus, a rare but serious illness spread by wild rodents.
What Is Hantavirus?
Hantavirus is not a single virus. It is a family of viruses carried by wild rodents. In the Americas, certain hantaviruses cause hantavirus pulmonary syndrome, usually shortened to HPS — a severe respiratory illness that attacks the lungs and can escalate to a medical emergency within days.
HPS is rare but serious. According to the Centers for Disease Control and Prevention, 890 cases of hantavirus disease were reported in the United States between 1993 and the end of 2023. Among patients who develop severe respiratory symptoms, the CDC estimates the case fatality rate at roughly 38 percent. There is no vaccine and no specific antiviral treatment. Prevention and safe cleanup are the only tools you have.
Roughly 94 percent of US cases have occurred west of the Mississippi River, but cases have been confirmed in more than 30 states, including Texas. In Central Texas, the risk is real, documented, and directly tied to the wild rodents being displaced by rapid development across Williamson County.
Which Rodents Actually Carry Hantavirus?
This is where most articles get it wrong, and the distinction genuinely matters if you want to understand your actual risk.
In the United States, hantavirus is carried by wild field rodents — not by the common house mouse or the Norway and roof rats found in most cities. The primary carrier is the deer mouse (Peromyscus maniculatus), which spreads Sin Nombre virus, the cause of most HPS cases in North America. Other native carriers include the white-footed mouse, the cotton rat, and the rice rat.
The Important Nuance. The common house mouse (Mus musculus) and the Norway and roof rats found in most cities are not considered primary hantavirus carriers in the United States. If a pest control company tells you every mouse in your home carries hantavirus, that is not accurate. The real risk comes from wild field rodents getting into your home — which is exactly what happens when construction and land clearing in Georgetown and across Williamson County push them out of their habitat.
That nuance is not a reason to relax. It is a reason to understand where the real risk sits — and in fast-growing areas like Georgetown, the wild rodents that do carry hantavirus are precisely the ones being displaced into garages, attics, and sheds every single month that new land gets graded.
Is Hantavirus a Real Risk in Central Texas and Georgetown?
Yes. The Texas Department of State Health Services tracks hantavirus as a notifiable condition, and CDC surveillance confirmed 49 hantavirus cases in Texas between 1993 and 2021. Research on rodent-associated hantaviruses in Texas has identified several distinct strains circulating in native rodent populations across the state.
- Sin Nombre virus — The strain responsible for most US hantavirus cases nationally. Found in white-footed mice, Texas mice, and related species detected in central and southern Texas.
- Bayou virus — Found in rice rats along the Gulf Coast and East Texas, and directly linked to confirmed HPS cases in the state.
- Muleshoe virus — Found in hispid cotton rats in northern Texas, with Limestone Canyon virus circulating in brush mice in West Texas.
Why Georgetown Is Specifically Vulnerable. Georgetown has been one of the fastest-growing cities in the country for years. Thousands of acres of cedar scrub and open ranch land across Williamson County get graded for new subdivisions constantly. The white-footed mice and Texas mice that can carry Sin Nombre virus do not disappear when that land is cleared. They move into the nearest available shelter — which is almost always a garage, attic, storage room, or crawlspace in a nearby home. This is why Wolf Ranch, Berry Creek, Sun City, and western Georgetown neighborhoods see so many field mice in the first years after construction.
The Texas DSHS also notes that HPS cases in the state are frequently associated with spring cleaning — when homeowners open up a shed, garage, or storage room that has been closed for months, find droppings, and reach for a broom. That instinct is the danger, and understanding it could make the difference.
Can you get hantavirus in Texas?
Yes. Texas recorded 49 hantavirus cases between 1993 and 2021 according to CDC surveillance, and the Texas DSHS monitors it as a notifiable condition. Sin Nombre virus has been detected in white-footed mice and Texas mice found in central Texas. The risk is low but real, and it rises when wild field rodents — displaced by Georgetown's rapid construction growth — get into homes and outbuildings across Williamson County.
Found droppings or heard scratching in your Georgetown home? Don't clean it yet — get the rodents removed first.
Call (737) 379-5045 — Free InspectionHow Do You Get Hantavirus? The Exposure Routes That Matter
Hantavirus is shed in an infected rodent's urine, droppings, and saliva. People are almost always exposed through the air, not through direct contact with a live animal.
Inhaling Contaminated Dust — The Main Route
When rodent droppings, urine, and nesting material dry out, the virus can become trapped in dust particles. Anything that stirs up that dust — sweeping, vacuuming, shaking out nesting material, or using compressed air — sends microscopic particles into the air where they can be breathed in. This is the primary way people contract hantavirus, and it is why the Texas DSHS specifically warns that HPS cases are frequently linked to spring cleaning.
In Georgetown attics, garages, sheds, and crawlspaces where field mice have been active, disturbing old nesting material without protection creates exactly this risk — especially in spaces that have been closed and undisturbed over the winter months.
Touching Contaminated Surfaces and Rodent Bites
Touching droppings, urine, or nesting material and then touching your eyes, nose, or mouth can also transmit the virus, which is why gloves and thorough hand washing are part of every safe cleanup. Transmission through a bite or scratch from an infected rodent is possible but considered rare. One reassuring fact: with the exception of Andes virus in South America, hantaviruses in the Americas are not known to spread from person to person. You cannot catch HPS from someone who has it.
Can you get hantavirus from sweeping mouse droppings?
Yes, and this is the single most common exposure route. Sweeping or vacuuming dry rodent droppings sends virus-containing dust particles into the air where they can be inhaled. The CDC specifically warns against dry cleanup of rodent waste. Always wet the droppings with a bleach solution or EPA-registered disinfectant first, let it soak for at least five minutes, and wipe up with paper towels instead of sweeping.
Hantavirus Symptoms: What to Watch For and When
Symptoms of HPS typically appear two to four weeks after exposure, though they can begin as early as one week or as late as eight weeks. The illness progresses in two distinct phases.
Early Phase Days 1–5
Looks like severe flu — easy to miss
- High fever and chills
- Severe muscle aches — thighs, hips, back, and shoulders
- Intense fatigue and headache
- Dizziness, nausea, vomiting
- Abdominal pain and diarrhea
Late Phase Days 4–10
Medical emergency — escalates rapidly
- Dry coughing and shortness of breath
- Tightness and pressure in the chest
- Lungs filling with fluid
- Rapid drop in blood pressure
- Typically requires ICU-level care
When to Seek Medical Care. If you develop fever, severe muscle aches, and especially shortness of breath within eight weeks of being around rodents or rodent droppings, seek medical attention immediately and tell your doctor about the rodent exposure. That exposure history is critical — early symptoms resemble the flu, HPS can progress within hours, and there is no specific antiviral treatment. Early supportive care in a hospital makes a real difference in outcomes.
How long after exposure do hantavirus symptoms appear?
Symptoms usually begin two to four weeks after exposure, but they can appear as early as one week or as late as eight weeks. The illness starts with fever, fatigue, and severe muscle aches in the thighs, hips, and back. Four to ten days later it can progress rapidly to coughing and shortness of breath as the lungs fill with fluid — which is a medical emergency requiring immediate hospital care.
How to Clean Rodent Droppings Safely: The CDC Method
If you have found droppings, nesting material, or a dead rodent, this is the protocol recommended by the CDC. Every step exists to keep contaminated dust out of the air you breathe.
Never Do This. Do not sweep. Do not vacuum. Do not dust. Do not use compressed air. Every one of these actions aerosolizes the virus and sends contaminated particles directly into the air — which is the single most common cause of hantavirus infection. Stop and read the steps below first.
Before You Start
First, deal with the rodents. The CDC recommends trapping the rodents and sealing entry points before cleanup begins, and continuing to trap for about a week. Cleaning while rodents are still active means you will simply be cleaning again next month. Then ventilate: open all doors and windows for at least 30 minutes and leave the space while it airs out. Turn off central heating and air conditioning so contaminated air is not pulled through the ducts and distributed through the rest of the home.
Wear rubber, latex, plastic, or vinyl gloves. For heavier contamination or an enclosed space like an attic or crawlspace, wear an N95 respirator or better. A basic dust mask provides limited protection against viral particles.
Mix one part household bleach to nine parts water, or use an EPA-registered disinfectant labeled for rodent cleanup. Make bleach solution fresh before each use and never mix bleach with ammonia or other cleaners.
Spray droppings, urine stains, and nesting material until they are visibly wet. Let the solution soak for at least five minutes. This step neutralizes the virus and keeps contaminated particles from becoming airborne when you pick them up.
Use disposable paper towels to pick up the soaked material. Do not use a broom, vacuum, or brush. Paper towels keep the waste contained rather than scattering it into the air.
Place all waste into a plastic bag, seal it, then place that bag inside a second bag and seal it too. Dispose of it in an outdoor covered trash bin, not an indoor wastebasket.
Mop hard floors and wipe countertops, cabinets, baseboards, and any hard surfaces in the affected area with fresh disinfectant. Bag and discard contaminated insulation and cardboard.
Wash your gloved hands thoroughly with soap and water first, then carefully remove the gloves and wash your bare hands again. Remove any protective gear before leaving the work area.
What should I do if I find mouse droppings in my attic?
Do not sweep or vacuum. Ventilate the attic for at least 30 minutes and leave the space while it airs out. Then wear gloves and an N95 mask, spray the droppings with a bleach solution of one part bleach to nine parts water until fully soaked, wait five minutes, wipe up with paper towels, and double bag everything. Address the rodents and seal the entry points before you clean — or the droppings will simply accumulate again. If the infestation is heavy or the space is poorly ventilated, call a professional.
When You Should Call a Professional Instead
Homeowner cleanup is appropriate for a small number of droppings in an accessible, well-ventilated area. There are situations where the CDC guidance and basic safety both point toward professional help.
- Heavy infestations across an attic or crawlspace — Extensive droppings and nesting material mean far more contaminated surface area and a much higher risk of disturbing viral particles even with precautions.
- Rodents in your HVAC or ductwork — The CDC specifically advises contacting a professional when there is evidence of rodent access to heating and cooling systems. Contaminated ducts can distribute dust through the entire home.
- Enclosed, hard-to-ventilate spaces — Attics, crawlspaces, and sealed sheds concentrate airborne particles in exactly the places you need to work.
- Rodents that keep returning — If you have cleaned up before and they came back, the entry points were never sealed. You are cleaning the same contamination over and over until that problem is addressed.
- Higher-risk individuals — Older adults, young children, people who are pregnant, and anyone immunocompromised should not perform rodent cleanup at all.
A professional removes the rodents, decontaminates the affected areas safely with proper protective equipment, and seals every entry point with professional-grade materials so the problem does not simply rebuild. For Georgetown and Williamson County homeowners, that means rodent control that ends the cycle rather than managing it month after month.
Found Droppings in Your Georgetown Home?
Don't clean it yourself if the infestation is heavy or the space is enclosed. We inspect, remove, seal, and decontaminate safely. Same-day service across Georgetown and Williamson County.
Call (737) 379-5045 — Free Rodent InspectionHow to Prevent Hantavirus: Keep Wild Rodents Out
Every cleanup protocol is a response to a problem that already happened. The only real prevention is keeping wild rodents out of your home and outbuildings before they ever get in. Both the CDC and Texas DSHS recommend the same core measures.
Seal Every Entry Point
A mouse can squeeze through a gap the size of a dime — roughly a quarter of an inch. Seal all openings around pipes, utility lines, vents, weep holes, and gaps under doors using steel wool, metal flashing, hardware cloth, or copper mesh. Do not rely on expanding foam alone; rodents chew straight through it. Sealing is the single most effective long-term protection because it stops new rodents from ever getting in, which also means no new droppings and no accumulating risk.
Remove What Attracts Them
Clear brush, woodpiles, and debris away from your home. Store pet food, birdseed, and garbage in rigid sealed containers. Remove clutter, cardboard boxes, and stacked paper from garages and attics — that is exactly what wild rodents use for nesting. And act early. A single pair of mice can produce dozens of offspring in a few months, and every one of them leaves droppings. The sooner rodents are removed and sealed out, the less contamination accumulates in your living space.
In Georgetown and Williamson County, the pressure does not stop. Active construction continuously displaces new wild rodents toward existing homes, so exclusion and monitoring are not a one-time fix. They are ongoing home maintenance in this region.
Hantavirus FAQ
There is no specific antiviral treatment and no vaccine for hantavirus. Treatment is supportive care in a hospital, often including oxygen therapy and ICU-level monitoring for severe cases. Early medical attention and telling your doctor about rodent exposure improves outcomes significantly — which is why it is critical not to wait if you develop fever, muscle aches, and shortness of breath after being near rodents or droppings.
In the United States, the common house mouse (Mus musculus) is not considered a primary hantavirus carrier. The main carriers are wild field rodents like deer mice, white-footed mice, and cotton rats. That said, wild field rodents frequently get into Georgetown homes — especially where construction has disturbed their habitat — so rodent droppings in an attic or shed should always be treated with caution regardless of which species left them.
Yes. Hantavirus is an enveloped virus, which makes it vulnerable to common disinfectants. A solution of one part household bleach to nine parts water inactivates it, as do EPA-registered disinfectants. The key is to soak the droppings until they are visibly wet and let the solution sit for at least five minutes before wiping up — so nothing becomes airborne. Never mix bleach with ammonia or other cleaners.
With the exception of Andes virus in South America, hantaviruses in the Americas are not known to spread between people. You cannot catch hantavirus pulmonary syndrome from someone who has it. Exposure comes from contact with infected wild rodents, their droppings, urine, saliva, or contaminated dust — not from another person.
It addresses the root cause. Removing the rodents and sealing every entry point stops new contamination from accumulating in your attic, garage, or crawlspace — which is the only lasting protection. Professional decontamination also removes existing droppings and nesting material safely without sending contaminated dust into the air you breathe. In Georgetown, where construction keeps pushing new wild rodents toward homes year-round, professional rodent control is the practical answer.
A small number of droppings in an accessible, well-ventilated area can be cleaned safely by a healthy adult following CDC protocol — ventilate first, soak with disinfectant, never sweep, double-bag the waste. But for heavy infestations, attics, crawlspaces, HVAC systems, or anyone at higher health risk, professional cleanup is the safer choice. More importantly: deal with the rodents and seal the entry points before you clean, or the droppings will simply rebuild. Cleaning without fixing the source is temporary at best.
Found Droppings in Your Home? Don't Clean It Yet.
The safest first move is to leave it alone and get the rodents removed and sealed out first. Georgetown Pest Defense removes rodents, seals every entry point with professional-grade materials, and decontaminates affected areas safely. Free inspections across Georgetown and Williamson County. Upfront pricing, no contracts.
Call (737) 379-5045 — Free Rodent InspectionServing Georgetown · Sun City · Wolf Ranch · Berry Creek · Old Town · Williamson County — ZIP codes 78626, 78628, 78633
This page is general information, not medical advice. If you believe you have been exposed to hantavirus or are experiencing symptoms, contact a healthcare provider immediately.