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Oral Antiseptics Have Ability To Inactivate Coronavirus

Sars-Cov-2 viruses can be "inactivated" using commercially available mouthwashes

In a fight against the novel coronavirus, scientists have found that certain oral antiseptics and mouthwashes may have the ability to inactivate human coronaviruses.

The results, published in the Journal of Medical Virology, indicate that some of these products might be useful for reducing the amount of virus in the mouth after infection and may help to reduce the spread of SARS-CoV-2, the coronavirus that causes Covid-19.

“While we wait for a vaccine to be developed, methods to reduce transmission are needed. The products we tested are readily available and often already a part of people’s daily routines,” said study researcher Craig Meyers from the Penn State University in the US.

During the study, the research team tested several oral and nasopharyngeal rinses in a laboratory setting for their ability to inactivate human coronaviruses, which are similar in structure to SARS-CoV-2.

The products evaluated include a one percent solution of baby shampoo, peroxide sore-mouth cleansers, and mouthwashes.

coronavirus
Oral antiseptics can help to reduce the coronavirus in the mouth after the infection. Flickr

The researchers found that several of the nasal and oral rinses had a strong ability to neutralize human coronavirus, which suggests that these products may have the potential to reduce the amount of virus spread by people who are Covid-19-positive.

They used a test to replicate the interaction of the virus in the nasal and oral cavities with the rinses and mouthwashes.

They treated solutions containing a strain of human coronavirus, which served as a readily available and genetically similar alternative for SARS-CoV-2, with the baby shampoo solutions, various peroxide antiseptic rinses, and various brands of mouthwash.

They allowed the solutions to interact with the virus for 30 seconds, one minute, and two minutes, before diluting the solutions to prevent further virus inactivation.

According to Meyers, the outer envelopes of the human coronavirus tested and SARS-CoV-2 are genetically similar so the research team hypothesizes that a similar amount of SARS-CoV-2 may be inactivated upon exposure to the solution.

coronavirus
Several of the mouthwash and gargle products also were effective at inactivating the infectious virus. Pixabay

To measure how much virus was inactivated, the researchers placed the diluted solutions in contact with cultured human cells.

They counted how many cells remained alive after a few days of exposure to the viral solution and used that number to calculate the amount of human coronavirus that was inactivated as a result of exposure to the mouthwash or oral rinse that was tested.

The one percent baby shampoo solution, which is often used by head and neck doctors to rinse the sinuses, inactivated greater than 99.9 percent of human coronavirus after a two-minute contact time.

Several of the mouthwash and gargle products also were effective at inactivating the infectious virus.

Many inactivated greater than 99.9 percent of the virus after only 30 seconds of contact time and some inactivated 99.99 percent of the virus after 30 seconds.

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The results with mouthwashes are promising and add to the findings of a study showing that certain types of oral rinses could inactivate SARS-CoV-2 in similar experimental conditions, the study noted.

Recently, a study, published in the Journal of Infectious Diseases, found that Sars-Cov-2 viruses can be “inactivated” using commercially available mouthwashes. (IANS)

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