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Inhalation of particles contaminated by the urine, feces, or saliva of infected rodents is the main entry point for hantavirus into the human body. Infectious disease specialist Daniel Paffili warns against inadequate cleaning in warehouses, depots, and rural areas, environments where the risk of contagion significantly increases.
Cleaning a warehouse, a forgotten depot, or a country house closed for months may seem like a simple task, but it requires specific care. Sweeping or vacuuming in places with rodent feces, urine, or saliva raises particles into the air and increases the risk of inhaling hantavirus, a disease that can evolve from a common flu to severe respiratory failure in a few days.
According to Metropoles, the warning comes from infectious disease specialist Daniel Paffili, who advises replacing brooms and vacuum cleaners with the method of surface humidification. The recommendation is to open doors and windows, let the environment ventilate for at least 30 minutes, and only then begin cleaning, using diluted bleach, gloves, and, in some cases, a protective mask.
How hantavirus reaches the human body
The main form of contamination is respiratory. According to the Ministry of Health, the disease is transmitted by inhaling airborne particles originating from the urine, feces, or saliva of infected rodents.
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The most critical environments are enclosed, with accumulated dust, such as depots, warehouses, barns, and rural constructions. Areas with a regular presence of rats also fall into this risk category.
Direct contact with contaminated surfaces, unprotected stored food, and animal nesting materials also poses a risk. Therefore, simply sweeping an enclosed environment can be dangerous when there are signs of infestation.
What symptoms can indicate the disease
The great challenge of hantavirus is that the initial symptoms are confused with several other diseases. High fever, intense body pain, headache, excessive fatigue, and general malaise are the most common initial signs.
“The main point of attention is that the initial symptoms are non-specific and can be confused with other diseases, such as dengue, influenza, leptospirosis, or Covid-19. In some cases, nausea, vomiting, abdominal pain, and dizziness may also appear,” explains infectious disease specialist Daniel Paffili.
In the Americas, the disease manifests in different forms, from non-specific acute fever to severe pulmonary and cardiovascular conditions. In more serious situations, it can evolve into acute respiratory distress syndrome (ARDS), a condition in which the lungs fail to adequately oxygenate the blood.
When to seek immediate medical attention
The rule is simple: anyone who has had recent contact with feces, urine, dust, or environments with the presence of rodents and begins to feel fever, body pain, or severe malaise should seek medical attention as soon as possible.
Seeking help should be immediate if there is shortness of breath, rapid worsening of the condition, or a drop in oxygenation. These three signs may indicate progression to the most severe form of the infection, which requires hospital support.
Informing the doctor about environmental exposure is essential. “This detail makes a big difference in diagnostic suspicion. The earlier there is suspicion, the greater the chances of adequate monitoring and rapid support if the condition progresses,” says Paffili.
What to tell during the medical consultation
The patient should report in detail where they have been in the weeks prior to the onset of symptoms. Presence in rural areas, warehouses, barns, and environments with signs of rats is crucial information for the doctor to raise the hypothesis of the disease.
It is also worth mentioning specific activities, such as cleaning long-closed properties, contact with stored grains, camping, or agricultural work. Each of these scenarios opens up the possibility of hantavirus exposure, even if the person has not seen rodents on site.
Diagnostic confirmation can be made by laboratory tests, such as serological tests, which identify antibodies against the virus, and molecular tests. In practice, the doctor usually combines symptoms, exposure history, and laboratory findings to confirm the suspicion.
There is no specific treatment for the infection
Unlike other viral infections, there is no specific antiviral medication for hantavirus disease. According to the Ministry of Health, treatment is supportive, adapted to the severity of the condition presented by each patient.
The U.S. Centers for Disease Control and Prevention (CDC) emphasizes that early assistance is crucial. The disease can cause severe respiratory distress and, in the most critical cases, requires hospitalization with oxygen support or mechanical ventilation.
This is the central reason for medical concern: without specific treatment, what determines the outcome is how quickly the patient reaches healthcare services and the quality of support received in the first hours after worsening.
What not to do when experiencing symptoms
The infectious disease specialist lists some common mistakes that increase the risk of complications. The first is ignoring symptoms or trying to treat the condition at home with self-medication, betting that it’s just a common viral infection.
Self-medicating with antibiotics has no effect on hantavirus, which is a viral infection, and can delay a correct diagnosis. Remaining at rest waiting for spontaneous improvement is also not recommended when there is a recent history of rodent exposure.
Delaying seeking medical attention is especially dangerous because the condition can evolve rapidly. In just a few days, a flu-like feeling can turn into respiratory failure requiring intensive support.
How to safely clean environments with signs of rodents
The correct way to clean suspicious locations is different from what most people usually do. The first step is to open doors and windows and let the environment ventilate for at least 30 minutes before any action.
Then, instead of sweeping or vacuuming, surfaces should be moistened with a diluted bleach solution. This procedure prevents contaminated particles from becoming airborne and being inhaled during cleaning.
Wearing gloves is mandatory, and in higher-risk situations, a protective mask is also recommended. Materials such as nests, food scraps, and feces should be packaged in sealed plastic bags and carefully discarded, without direct handling.
How to prevent hantavirus contamination
Prevention begins with rodent control. Keeping food stored in sealed containers, sealing cracks in walls and doors, and avoiding debris accumulation are effective measures to reduce the presence of these animals in homes and rural areas.
In rural properties, farms, and vacation homes closed for long periods, the recommendation is never to enter without first ventilating the environment. This simple change in habit drastically reduces the risk of inhaling contaminated particles.
Those who work in fields, silos, warehouses, and barns should regularly use personal protective equipment. The combination of gloves, mask, and ventilation is the basic package to reduce the chance of contagion in environments that naturally have rodents present.
The alert about hantavirus comes at a time of increasing attention to the disease on the continent, with ongoing investigations into recent outbreaks. Small changes in cleaning habits can make a real difference between a safe cleanup and an exposure that puts health at risk.
And you, did you know that sweeping an area with rat feces can spread the virus through the air? Did you know the correct procedure for cleaning sheds and enclosed areas? Do you intend to change the way you clean at home or at work? Leave your comment, share your experience, and tag someone who needs to know these guidelines.
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