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Home Science & Environment Medical Research

Why drying clothes indoors could put your health at risk

February 3, 2025
in Medical Research
Reading Time: 6 mins read
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drying laundry
Credit: Unsplash/CC0 Public Domain

Hanging the washing out to dry in the garden has been a rare sight these last few months, with winter storms bringing freezing temperatures and 100mph gusts of wind. But does the way we dry our clothes indoors actually matter?

Drying wet clothing on racks in poorly ventilated spaces could increase the amount of mold growing in your home, which is associated with poor health and, in some cases, even death.

When mold grows in your home, it can form black or green colored patches on the walls, and usually creates an unpleasant musty smell. It shouldn’t be ignored, because being exposed to mold over long periods of time can have serious health implications.

Mold is a broad term for a group of fungi that produce tiny particles called spores. Fungi produce spores when conditions are right for their growth, which can include cooler temperatures and high humidity. This is why you’re more likely to find mold growing on bathroom ceilings or damp walls, where there is more water for fungal spores to settle and grow.

There are many different species of mold. The most common ones to cause problems in damp homes are penicillium and aspergillus. It’s estimated that we breathe in small numbers of spores from these fungi on a daily basis.

Luckily, our immune system is very good at spotting and killing fungal spores, which limits the number of fungal lung infections in humans even though we’re constantly exposed. Immune cells called macrophages sit inside the air spaces of the lungs (called alveoli), and these cells eat anything you inhale that could be considered harmful, including fungal spores.

Risks for compromised immune systems

However, there are many people whose immune systems are not able to remove fungal spores, and in these cases the fungi can cause dangerous infections or make underlying health conditions (such as asthma) much worse.

People who have damaged or compromised immune systems are at higher risk of becoming seriously unwell from fungal infections. Molds like aspergillus cause infections in patients with limited immune function, or who have lung damage from diseases like asthma, cystic fibrosis and chronic obstructive pulmonary disease (COPD) associated with heavy smoking.

In people with asthma, the immune system overreacts to triggers (including fungal spores) causing inflammation in the lung. This inflammation makes it more difficult to breathe by reducing the size of the airways. The same type of immune response is responsible for the symptoms of asthma and allergic responses, and fungal spores can also trigger these same types of immune responses. This means that fungal spores can be a particularly powerful trigger for some people.






In very extreme cases, the fungal spores don’t just cause inflammation but can invade the airways and block them, leading to bleeding within the lung. This happens when spores germinate and form long spiderweb-like projections called mycelium which create sticky lumps that block airways and damage the delicate tissues of the lung.

Growing resistance

Aspergillus infections are treated with antifungal drugs called azoles, which prevent the fungal cells from forming properly. Azoles are very effective, but there are increasing rates of resistance to azoles reported in aspergillus, which is a significant cause for concern.

We have a limited range of antifungal drugs available to treat mold infections—and when resistance develops this can severely reduce the options a patient has for treatment.

Resistance to drugs such as azoles can develop in patients who take these drugs for long periods of time, but recent research has indicated that resistance is more commonly developing in the environment, where most fungi are found. This means that even before a patient is diagnosed with an aspergillus infection, it may already be too late for the antifungal drugs to be effective.

Development of drug resistance in environmental fungi has been linked to the use of azoles and other antifungal drugs in farming. Fungal infections are a big problem for crops, and plants need protection from these infections the same way we do. Unfortunately, the same drugs we use in the clinic are the same types that are being used in agriculture.

Climate change may also be driving drug resistance in environmental fungi. Exposure to high temperatures was recently found to help molds develop resistance to commonly prescribed antifungal drugs. There have also been reports of patients becoming ill from species of mold that were not thought to cause human disease, in part because they could not grow at the human body temperature.

More mold species could therefore be picking up the ability to cause infections, as well as becoming drug resistant. Research programs and health care initiatives that monitor for these changes are vital to help us become prepared for potential increases in mold infections.

While a healthy immune system means that typical exposure to fungal spores is not likely to cause you any health problems, being exposed to very large amounts of fungal spores can prove to be fatal even for people who don’t have underlying health issues.

In 2020, toddler Awaab Ishak died as a direct result of high exposure to fungal spores, caused by excessive damp and mold in his home.






His death led to a change in UK law (Awaab’s Law) which requires landlords to respond promptly to damp in homes they manage, to ensure that tenants are not exposed to excessive levels of fungal spores which can affect their physical and mental health.

It’s important, then, to help keep your home free of mold. The best way to do this is to ensure you have good ventilation and take other measures to reduce damp, such as using a dehumidifier or investing in a heated clothes rack to dry your clothes indoors in the winter.

Provided by
The Conversation


This article is republished from The Conversation under a Creative Commons license. Read the original article.The Conversation

Citation:
Why drying clothes indoors could put your health at risk (2025, February 3)
retrieved 3 February 2025
from https://medicalxpress.com/news/2025-02-drying-indoors-health.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.



drying laundry
Credit: Unsplash/CC0 Public Domain

Hanging the washing out to dry in the garden has been a rare sight these last few months, with winter storms bringing freezing temperatures and 100mph gusts of wind. But does the way we dry our clothes indoors actually matter?

Drying wet clothing on racks in poorly ventilated spaces could increase the amount of mold growing in your home, which is associated with poor health and, in some cases, even death.

When mold grows in your home, it can form black or green colored patches on the walls, and usually creates an unpleasant musty smell. It shouldn’t be ignored, because being exposed to mold over long periods of time can have serious health implications.

Mold is a broad term for a group of fungi that produce tiny particles called spores. Fungi produce spores when conditions are right for their growth, which can include cooler temperatures and high humidity. This is why you’re more likely to find mold growing on bathroom ceilings or damp walls, where there is more water for fungal spores to settle and grow.

There are many different species of mold. The most common ones to cause problems in damp homes are penicillium and aspergillus. It’s estimated that we breathe in small numbers of spores from these fungi on a daily basis.

Luckily, our immune system is very good at spotting and killing fungal spores, which limits the number of fungal lung infections in humans even though we’re constantly exposed. Immune cells called macrophages sit inside the air spaces of the lungs (called alveoli), and these cells eat anything you inhale that could be considered harmful, including fungal spores.

Risks for compromised immune systems

However, there are many people whose immune systems are not able to remove fungal spores, and in these cases the fungi can cause dangerous infections or make underlying health conditions (such as asthma) much worse.

People who have damaged or compromised immune systems are at higher risk of becoming seriously unwell from fungal infections. Molds like aspergillus cause infections in patients with limited immune function, or who have lung damage from diseases like asthma, cystic fibrosis and chronic obstructive pulmonary disease (COPD) associated with heavy smoking.

In people with asthma, the immune system overreacts to triggers (including fungal spores) causing inflammation in the lung. This inflammation makes it more difficult to breathe by reducing the size of the airways. The same type of immune response is responsible for the symptoms of asthma and allergic responses, and fungal spores can also trigger these same types of immune responses. This means that fungal spores can be a particularly powerful trigger for some people.






In very extreme cases, the fungal spores don’t just cause inflammation but can invade the airways and block them, leading to bleeding within the lung. This happens when spores germinate and form long spiderweb-like projections called mycelium which create sticky lumps that block airways and damage the delicate tissues of the lung.

Growing resistance

Aspergillus infections are treated with antifungal drugs called azoles, which prevent the fungal cells from forming properly. Azoles are very effective, but there are increasing rates of resistance to azoles reported in aspergillus, which is a significant cause for concern.

We have a limited range of antifungal drugs available to treat mold infections—and when resistance develops this can severely reduce the options a patient has for treatment.

Resistance to drugs such as azoles can develop in patients who take these drugs for long periods of time, but recent research has indicated that resistance is more commonly developing in the environment, where most fungi are found. This means that even before a patient is diagnosed with an aspergillus infection, it may already be too late for the antifungal drugs to be effective.

Development of drug resistance in environmental fungi has been linked to the use of azoles and other antifungal drugs in farming. Fungal infections are a big problem for crops, and plants need protection from these infections the same way we do. Unfortunately, the same drugs we use in the clinic are the same types that are being used in agriculture.

Climate change may also be driving drug resistance in environmental fungi. Exposure to high temperatures was recently found to help molds develop resistance to commonly prescribed antifungal drugs. There have also been reports of patients becoming ill from species of mold that were not thought to cause human disease, in part because they could not grow at the human body temperature.

More mold species could therefore be picking up the ability to cause infections, as well as becoming drug resistant. Research programs and health care initiatives that monitor for these changes are vital to help us become prepared for potential increases in mold infections.

While a healthy immune system means that typical exposure to fungal spores is not likely to cause you any health problems, being exposed to very large amounts of fungal spores can prove to be fatal even for people who don’t have underlying health issues.

In 2020, toddler Awaab Ishak died as a direct result of high exposure to fungal spores, caused by excessive damp and mold in his home.






His death led to a change in UK law (Awaab’s Law) which requires landlords to respond promptly to damp in homes they manage, to ensure that tenants are not exposed to excessive levels of fungal spores which can affect their physical and mental health.

It’s important, then, to help keep your home free of mold. The best way to do this is to ensure you have good ventilation and take other measures to reduce damp, such as using a dehumidifier or investing in a heated clothes rack to dry your clothes indoors in the winter.

Provided by
The Conversation


This article is republished from The Conversation under a Creative Commons license. Read the original article.The Conversation

Citation:
Why drying clothes indoors could put your health at risk (2025, February 3)
retrieved 3 February 2025
from https://medicalxpress.com/news/2025-02-drying-indoors-health.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.


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