Disclaimer: The information shared in this post is for educational and informational purposes only and should not be considered medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional regarding any medical concerns.
Rats are more than just pests. Behind the scratching sounds in ceilings and the droppings hidden in the corner of your space lies a serious health risk many Malaysians have rarely heard of —
Hantavirus.
While most people associate rats with contamination of food or foul smells, hantavirus is one of the reasons rodent infestations should never be ignored.
What Is Hantavirus?
Hantavirus is a virus carried by certain species of rodents such as Black rat, Malaysian Field rat and Polynesian rat.
Humans can become infected when they come into direct contact with infected rat urine, saliva, or droppings — especially when these particles become airborne.
This means even a clean and neat storeroom, ceiling space, or kitchen could pose a risk if rats have been active there.
How Do People Get Infected?
Shockingly, most hantavirus infections happen during cleaning.
Without thinking much, many homeowners unknowingly sweep or vacuum rat droppings, causing tiny virus particles to float and disperse into the air where they can be inhaled.
Common high-risk situations include:
- Cleaning rooms
- Handling rat nests
- Sweeping dried rat droppings
- Entering warehouses with rodent activity
- Food factories with poor pest management
It is important to also note that a rare, specific strain of Hantavirus - Andes Virus (found in South America) is found to be able to transmit between human to human through close, prolonged contact.
Signs You May Have a Rat Problem at Home
Have you been hearing of gnawing sounds coming from the ceiling at night? Chances are, there are rats living in your ceiling. If you are unsure, look for these warning signs:
1. Rat Droppings
Small dark pellet-like droppings at the corners of your house, near kitchens, cabinets, or storerooms.
2. Scratching Sounds at Night
Rats are most active after dark, especially inside ceilings and walls.
3. Gnaw Marks
Rats constantly chew on wires, cardboard, plastic, and wood. This is because their incisors never stop growing. They need gnaw on hard objects to keep their teeth trimmed and sharp, preventing overgrowth resulting in inability to feed.
4. Strong Musky Smell
A persistent unpleasant odour can indicate hidden nesting areas.
5. Grease Marks Along Walls
As rats do not bath, they are dirty and oily hence leaving smudges where they repeatedly travel. This usually indicates their travel path, and this will help us locate the rodent’s entry point.
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Rat Droppings
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Chewed Wires
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Bitten Food Packaging
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Symptoms of Hantavirus Infection
Early symptoms initially feel like a normal flu, making it easy to overlook.
Common symptoms include:
- Fever
- Muscle aches
- Headache
- Fatigue
- Chills
- Nausea
As it progresses to late stage, symptoms include coughing, shortness of breath, and tightness in chest as lungs fill with fluid.
In severe cases, it causes rapid respiratory failure requiring ventilation, severe hypotension and kidney failure.
If symptoms appear after exposure to rat droppings or infested environments, seek for medical attention immediately.
The WRONG Way to Clean Rat Droppings
One of the biggest mistakes people make is:
❌ Sweeping
❌ Vacuuming
❌ Using a dry broom
These actions contribute to the spread of contaminated particles into the air.
The SAFE Way to Clean Rat Droppings
Follow these safer cleaning steps:
- Wear gloves and a mask
- Open windows for ventilation
- Spray droppings thoroughly with disinfectant
- Let it soak for at least 5–10 minutes
- Wipe using paper towels
- Dispose of waste in sealed plastic bags
- Wash hands thoroughly afterward
Why DIY Rat Control Often Fails
When homeowners see rats running across the house, they will normally freak out. They will quickly rush to the nearest hardware store to get rodent glue boards, traditional metal traps or poison, but rats are intelligent, cautious, and highly adaptable.
Common reasons infestations return:
- Hidden nesting locations
- Untreated entry points
- Poor waste management
- Ceiling and drainage access
- Nearby food sources
Without identifying the root cause, rat problems often become recurring infestations even without correct DIY tools.
Why You Need Professional Pest Control Treatments
Professional rodent control focuses on:
- Full inspection of infestation area
- Entry point identification
- Safe baiting technique and strategies
- Monitoring programs
- Long-term prevention
For businesses such as restaurants, food factories, and warehouses, proper rodent management is especially important to protect health, cost, and reputation.
Final Thoughts
Rats are not just “dirty pests” or ‘nuisance’. They are potential carriers of dangerous diseases. The biggest danger is that most infestations start quietly — a few droppings, faint scratching sounds, or a slight smell — until the problem becomes serious.
Early action can prevent costly damage, contamination, and health risks.
If you suspect rodent activity in your home or workplace, a professional inspection can help identify hidden infestation points before the problem spreads. To learn more about our Rodent Treatment Plan,
click here.
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