Door Handle Bacteria: A Guide to Prevention and Cleaning

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Elegant vintage crystal door handle captured in monochrome with intriguing light reflections.
Credit: pexels.com, Elegant vintage crystal door handle captured in monochrome with intriguing light reflections.

Door handles can be hotbeds of bacteria, with some studies showing that they can harbor up to 26 times more bacteria than toilet handles.

To put that into perspective, consider that the average person touches their door handle around 10 times a day, which can lead to the spread of germs and illnesses.

In fact, one study found that 70% of door handles in public places were contaminated with bacteria, including E. coli and MRSA.

The good news is that preventing and cleaning door handle bacteria is easier than you think.

Precautions and Prevention

Door handles are a hotspot for bacteria to gather and create colonies, making them a breeding ground for germs.

Automatic doors are becoming increasingly popular in public buildings because they eliminate the need to touch door handles altogether, reducing the risk of cross-contamination.

Using a doorman who opens and closes the main door can also help prevent the spread of diseases, as seen in luxury hotels where visitors and deliveries are screened.

Curious to learn more? Check out: Handles for Wheelchairs

Credit: youtube.com, Standard & Isolation Precautions Nursing | Infection Control Contact, Droplet, Airborne PPE NCLEX

Wearing gloves, using paper towels or tissues to open handles, or using tools like the loodini to avoid touching door handles altogether can also help prevent the spread of germs.

The primary risk of touching door handles is the transfer of bacteria into the body through the mouth, nose, or eyes by touching the face.

A 2016 study by the Worcester Polytechnic Institute found 1,323 bacterial colonies among 27 door handles on their university campus.

Flu viruses can last up to 24 hours on door handles, making them a potential source of infection.

Handles that can be operated using the forearm or the foot have been developed to minimize contact with door handles.

Factors Affecting Bacteria

Door handles don't provide the best conditions for most bacteria to grow, surviving for only about 8 hours at room temperature (around 20 degrees Celsius) and with a dry surface.

Bacteria thrive in a specific pH range, growing the quickest between 6-8.

There are exceptions like MRSA, which can survive on door handles for days to weeks without moisture at room temperature.

MRSA specifically thrives in a narrower pH range, between 7.4-7.6.

Door Handle Materials

Close-up of an elegant car door handle with wood trim, showcasing modern automotive design.
Credit: pexels.com, Close-up of an elegant car door handle with wood trim, showcasing modern automotive design.

Door handle materials can play a significant role in the growth of bacteria. Different materials can make a big difference in preventing the spread of germs.

Stainless steel is a common material used for door handles, but it's not the best choice for keeping bacteria at bay. In one experiment, a stainless steel plate was coated with 10 million cells of MRSA and bacteria thrived on it.

Copper, on the other hand, has natural antibacterial properties that can help destroy bacteria. It works both directly and indirectly to kill germs, making it a great choice for door handles. Copper interacts with bacteria's metabolism to generate free radicals that destroy DNA and inhibit respiration.

For your interest: Aircon Bacteria

Location

Location plays a significant role in determining the life expectancy of bacteria on door handles. Public places like bathrooms, toilets, and front doors are hotspots for germs due to frequent human contact.

Handles in these areas are exposed to a wide variety of germs that can easily transfer from one person's hands to another.

In contrast, places like ordination rooms and laboratories tend to have lower bacterial counts due to their clean and sanitized environments. However, even in these areas, there's still a possibility of infective organisms being present.

Material

Steel Door Handle on Door
Credit: pexels.com, Steel Door Handle on Door

The material your door handle is made from can play a significant role in the growth of bacteria. Stainless steel plates, commonly used in door handles, can harbor bacteria like MRSA.

Copper, on the other hand, has natural antibacterial properties that can destroy bacteria. This is due to the release of copper ions that degrade the DNA of a cell and inhibit its respiration.

Tests have shown that copper is effective against superbugs like MRSA, C difficile, and other germs like the flu virus and E. coli.

Built-In Antimicrobial Protection

Copper is a game-changer when it comes to door handle materials. It has natural antibacterial properties that can destroy bacteria, including superbugs like MRSA and C difficile, by releasing copper ions that degrade their DNA and inhibit their respiration.

One experiment showed that copper is effective against a wide range of bacteria, including the flu virus and E. coli. This is because copper interacts with the bacteria's metabolism to generate free radicals that destroy their DNA and inhibit their respiration.

Brown Metal Door Handle Photograph
Credit: pexels.com, Brown Metal Door Handle Photograph

Silver has been used for centuries as an antimicrobial agent, and it's still effective today. Small amounts of silver can disrupt bacteria's metabolism and prevent reproduction, ultimately killing off bacteria colonies.

Frequent hand-washing and disinfecting are essential steps to avoiding illnesses transmitted by bacteria on doorknobs and handles. But with silver antimicrobials, surfaces like doorknobs become inhospitable for bacteria to survive, making those practices even more effective.

Types of Bacteria

You'll find a variety of bacteria and other microbes on your doorknobs, especially if they aren't cleaned regularly. Human rotavirus is one of the potential contaminants you might find, which causes vomiting and watery diarrhea in young children, as well as fevers and dehydration.

The types of bacteria on your doorknobs can be alarming, to say the least. You'll find human rotavirus, which can lead to serious health issues in young children.

Health Risks and Diseases

Door handles are hotspots for bacteria, and it's not just a minor issue. Every type of bacteria and germ can live on door handles, including E Coli, MRSA, and others.

Monochrome close-up of a vintage car door handle in metallic tones.
Credit: pexels.com, Monochrome close-up of a vintage car door handle in metallic tones.

On average, 5 different bacteria are living on your door handle at any given time. That's a staggering number, and it's no wonder that door handles are among the top 5 dirtiest objects in a home.

Door handles are one of the fastest ways viruses and bacteria spread, because everybody is touching them and they rarely get cleaned. You should clean your doorknobs and clean them often.

The common cold is one of the most common diseases caused by door handle bacteria, and it's spread mostly by direct contact with an object or surface that has been contaminated by the infection. This is a clear reminder to wash your hands frequently, especially after touching a door handle.

It's not just about the door handles in your home - they can also be a breeding ground for bacteria when you bring germs from outside into your interior doorknobs. Whether you're bringing germs from outside or preparing food and use the refrigerator handle without washing your hands, door handles are hotbeds for all sorts of bacteria.

Cleaning Methods and Solutions

Close-up of a vintage car door handle in a black and white photograph, showcasing retro design.
Credit: pexels.com, Close-up of a vintage car door handle in a black and white photograph, showcasing retro design.

Cleaning doorknobs is a must, especially with the rise of Covid-19. Studies find that most people who touch dirty door handles forget to wash their hands before touching their face.

Using disinfecting wipes that include quaternary ammonium compounds (quats or QACs) is often best when cleaning doorknobs, as this solution has been tested and proved to have antimicrobial properties.

A little time spent cleaning your front doorknob can save you from getting that virus or bacteria on or in your body. It's as simple as spraying it with some isopropyl alcohol or using soap and water to wipe it down.

Even with regular cleaning, bacteria were detected on more than 20% of handles. Different types of door handles can affect the amount of time the bacteria can survive on the doorknob.

Stainless steel door handles, which most door handles are made from, are a material that allows bacteria to thrive. Cleaning and disinfecting regularly is key to reducing bacteria on door handles.

Additional reading: Cleaning Oak Furniture

Door Handle Hygiene

Person Holding on Ambulance Door Handle
Credit: pexels.com, Person Holding on Ambulance Door Handle

Door handles are notorious for being hotbeds of bacteria, with some studies showing that they can harbor up to 5 different types of bacteria at any given time.

You might be surprised to learn that doorknobs are often made of materials that can absorb and retain dampness, making them perfect conditions for germs and bacteria to thrive.

Cleaning your doorknob is easier than you think - just spray it with some isopropyl alcohol or use soap and water to wipe it down.

Door handles are one of the fastest ways viruses and bacteria spread because everyone is touching them and they rarely get cleaned.

In fact, studies have shown that doorknobs can accumulate far more bacteria than toilet seats, which is likely due to people not sanitizing their hands correctly.

One great solution to this problem is to accept the fact that your hands will be dirty after touching a doorknob and find an effective hand soap with active antibacterial ingredients that you can use on the go.

You should clean your doorknobs and clean them often, as they are among the top 5 dirtiest objects in a home.

Curious to learn more? Check out: How to Clean Mahogany Wood

Kwikset Redefines Cleanliness

Close-up of a vintage car door handle showcasing retro design and patina.
Credit: pexels.com, Close-up of a vintage car door handle showcasing retro design and patina.

Kwikset has redefined door handle cleanliness by incorporating antimicrobial technology into their door handles for enhanced surface protection and longer-lasting cleanliness.

Cleaning your doorknob is easy, it doesn't take all day. Spray it with some isopropyl alcohol or use soap and water to wipe it down.

Kwikset's antimicrobial technology can help prevent the spread of viruses and bacteria on door handles. This is especially important during cold and flu season when we're more likely to be around others who may be sick.

Spraying your doorknob with isopropyl alcohol can save you from getting a virus or bacteria on or in your body. It's a simple step that can make a big difference in keeping you healthy.

Final Thoughts

I've looked down at my hands more than once while writing this article thinking about my own doorknobs. I want to clean my door handles immediately.

Washing your door handles often can make a big difference in preventing the spread of disease. Remember that only you prevent the spread of a disease like this because the germs are everywhere.

I am going to wash my door handles more often, and I suggest you do the same. With a pandemic like this and so many germs on your door handle, what could it hurt?

Wash your hands and wash them often.

Seth Meier

Senior Writer

Seth Meier is an experienced writer who has a passion for technology and innovation. He has worked in the tech industry for over a decade and has developed a deep understanding of emerging trends and disruptive technologies. As a blogger, Seth focuses on providing valuable insights and analysis on various topics related to technology, entrepreneurship, and digital marketing.

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