Host dysosmia in SARS-CoV-2 infection

Published: 23 August 2021| Version 1 | DOI: 10.17632/h8hmkcf6gk.1
Matteo Briguglio


The respiratory condition COVID-19 arises in a human host upon the infection with SARS-CoV-2, a coronavirus that was first acknowledged in Wuhan, China, at the end of December 2019 after its outbreak of viral pneumonia. The full-blown COVID-19 can lead, in susceptible individuals, to premature death because of the massive viral proliferation, hypoxia, misdirected host immunoresponse, microthrombosis, and drug toxicities. Alike other coronaviruses, SARS-CoV-2 has a neuroinvasive potential, which may be associated with early neurological symptoms. In the past, the nervous tissue of patients infected with other coronaviruses was shown to be heavily infiltrated. Patients with SARS-CoV-2 commonly report dysosmia, which has been related to the viral access in the olfactory bulb. However, this early symptom may reflect the nasal proliferation that should not be confused with the viral access in the central nervous system of the host, which can instead be allowed by means of other routes for spreading in most of the neuroanatomical districts. The dataset was used to write the hypothesis "Disentangling the Hypothesis of Host Dysosmia and SARS-CoV-2: The Bait Symptom That Hides Neglected Neurophysiological Routes", which was published by the Journal Frontiers in Physiology in 2020.



IRCCS Istituto Ortopedico Galeazzi


Clinical Neurophysiology, Olfactory Disorder, Severe Acute Respiratory Syndrome Coronavirus 2, COVID-19