A Marker of Covid-19 : Loss of sense of smell There is new
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Dipanjan Das
A Marker of Covid-19 : Loss of sense of smell

There is new evidence for the loss of smell as a symptom of Covid-19 infection . Post- viral anosmia is one of the leading causes of loss of sense of smell in adults, accounting for up to 40% cases of anosmia.

- viruses that give rise to the common cold are well known to cause post infectious loss and over 200 different viruses are known to cause upper respiratory tract Infections . Previously described corona viruses are thought to account for 10-15% cases.

■ How loss of sense of smell could indicate Covid-19 infection?

# Researchers have said corona virus can attach to different types of cell in nasal cavity, which could explain why several patients are reporting a loss of sense of smell.

# Doctors from across the world have reportedly found that a significant number of novel corona virus positive patients loss their sense of smell.

# While the loss of sense of smell is often hard to detect, this may be an early indicator in many Covid-19 patients who are infected. If such patients are isolated at an early stage, the spread of infection from asymptomatic patients could be reduced .

# ENT specialists in the UK , has pointed out that a significant numbers of patients with proven Covid-19 infection from South Korea, China and Italy developed anosmia- a partial or complete loss of sense of smell.

● VIRAL INFECTIONS OFTEN CAUSE LOSS OF SENSE OF SMELL:-

# Viruses that give rise to the common cold are well known to cause post infectious loss and over 200 different viruses are known to cause upper respiratory tract Infections .

# Previously described corona viruses are thought to account for 10-15% cases. It is therefore perhaps no surprise that the novel Covid-19 virus would also cause anosmia in infected patients..

# Respiratory viral infection can cause injury in the specialized nerve tissue leading to the loss of the ability to detect smells.

# Virus attacks supporting cells , not smell related neurons.
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