Reckless use of antimicrobial chemicals during the Covid-19 pandemic is linked to health problems, microbial resistance and environmental damage, warn scientists in their publication in the journal Environmental Science & Technology.

Scientists detail how quaternary ammonium compounds (QACs) are increasingly used in the home, healthcare, education and workplaces, despite the availability of safer alternatives and in some cases limited evidence of reduction in transmission Covid-19.

QACs are used in disinfectant solutions, wipes, hand sanitizers, sprays and nebulizers, and are also incorporated into personal care products, fabrics, paints, medical instruments and more. One of the most common such chemicals is benzalkonium chloride, while others can be identified on ingredient labels with names ending in “ammonium chloride” or the like.

However, the recognition of QACs varies widely. For example, pesticide labels are required to list QACs, but paint labels are not.

Studies have found associations between QACs and asthma, dermatitis and inflammation. Also, animal studies raise concerns about possible links to infertility and birth defects. In addition, there is evidence dating back to the 1950s that they contribute to microbial resistance, making certain types of bacteria resistant to both QACs and critical antibiotics.

“Disinfectant wipes containing QACs are often used on children’s school desks, on hospital exam tables and in homes, where they remain on these surfaces and in the air,” says Courtney Carignan, an assistant professor at Michigan State University and one of the researchers. authors of the study. As she adds, “we recommend regular cleaning with soap and water and disinfecting only when necessary, with safer products.”