Health
COVID-19-induced olfaction differs from common cold: research, science news
While many may be confused between the loss of odor associated with COVID-19 and a bad cold or flu, new research has discovered how one can distinguish the two.
A study of a group of European olfactory disorders specialists, including Professor Filpot, was conducted at the University of East Anglia.
The study, published in the journal Rhinology, is the first to compare how people with COVID-19 olfactory and taste disorders differ from those with other causes of upper respiratory tract infections.
The main difference is that COVID-19 patients also lose their sense of smell, but can breathe freely, are not prone to runny nose or stuffy nose, and cannot detect bitterness or sweetness.
See also: Seven killer viruses that appeared in China and destroyed the world
These findings weight the theory that COVID-19 infects the brain and central nervous system. The research team hopes their work will help develop odor and taste tests for rapid COVID-19 screening in primary care and emergency departments.
“We are very pleased to hear that,” said Karl Philpot, Principal Investigator at Norwich Medical School at UEA. What is the difference between the COVID-19 odor loss and the odor loss that can occur if the nose is clogged and the nose is clogged? “
The study team conducted an age- and gender-matched odor and taste test in a control group of 10 COVID-19 patients, 10 colds and 10 healthy people.
Professor Philpott said: “We wanted to see if their odor and taste test scores would help distinguish COVID-19 patients from those with severe colds. COVID-19, for example, is known as the cytokine storm. It is the immune system against overreaction by affecting the nervous system.”
“So I suspected that the patterns of olfaction were different between the two groups. The Covid-19 patent found that olfaction was much more severe. They could identify the odor. No bitterness or sweetness could be identified. In fact, it was this real loss of taste that appeared to be present in COVID-19 patients compared to those with colds.”
This is very exciting, as it means that odor and taste tests can be used to distinguish between Covid-19 and normal cold or flu patients.
Such tests cannot replace formal diagnostic tools such as throat swabs, but when traditional tests are not available or when rapid screening is needed, especially at the level of primary care, the emergency department, or the airport. Can provide an alternative.
The study also shows that when it comes to malodor and loss of taste in COVID-10 patients, something completely different is happening compared to those with severe colds: the COVID-19 virus affects the central nervous system It was previously suggested to give, based on neurological signs developed by some patients.
There are also similarities with SARS, which are reported to enter the brain probably via nasal odor receptors.
“Our results, at least in part, reflect a specific involvement at the level of the central nervous system in some COVID-19 patients. Because COVID-19 is particularly known, It is especially interesting that it seems to affect the sweet and bitter taste receptors to play an important role in innate immunity.”
” Whether genetic variations in people’s bitter and sweet receptors predispose to COVID-19, or conversely, whether COVID-19 infection alters the function of these receptors either directly or through a cytokine storm Further research is needed to confirm-more-the reaction of the body’s immune system,” Filpot said.
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