StemCell Therapy

(StudyFinds.org) Long COVID continues to confound doctors as patients still struggle with debilitating symptoms months after first being infected. A new study now suggests that COVID patients who could be long-haulers could be diagnosed by taking a close look at their eyes. Nerve fiber loss and an increase in key immune cells on the surface of the eye may be a way of identifying the long term impact of the virus, say scientists.

The changes are particularly evident among those with neurological symptoms, such asloss of taste and smell,headache, dizziness, numbness, and neuropathic pain. Doctors at Weill Cornell Medicine-Qatar say long COVID ischaracterized by a range of symptomswhich continue for more than four weeks after the acute phase of the infection has passed, and which arent explained by an alternative diagnosis.

CCM has been used to identify nerve damage and inflammatory changes attributable to diabetic neuropathy,multiple sclerosis, and fibromyalgia..

Forty people who had recovered from confirmed COVID-19 infection between one and six months earlier completed a National Institute of Health and Clinical Excellence (NICE) questionnaire. Data was used to find out if they had long Covid, with a total score ranging from zero to 28. Neurological symptoms were present at four and 12 weeks in 22 out of 40 patients (55 percent) and 13 out of 29 (45 percent), respectively, according to the findings published in theBritish Journal of Ophthalmology.

The participants corneas were then scanned using CCM to look for small nerve fiber damage and the density of dendritic cells. These have a key role in the primaryimmune system responseby capturing and presenting antigens from invading organisms.

The corneal scans were compared with those of 30 healthy people who hadnt been infected by COVID.

Results show that 55 percent of theCOVID patientshad no clinical signs of pneumonia. Twenty-eight percent had clinical signs of pneumonia not requiring oxygen therapy. Ten percent had been admitted to hospital with pneumonia and received oxygen therapy, and 8 percentt with pneumonia had been admitted to the intensive care.

The corneal scans revealed that patients with neurological symptoms for four weeks after they had recovered from acute COVID-19 had greater corneal nerve fiber damage and loss, with higher numbers of dendritic cells, than those who hadnt been infected by the virus. Those without neurological symptoms had comparable numbers of corneal nerve fibers as those who hadnt been infected with COVID, but higher numbers of dendritic cells.

The questionnaire responses indicative oflong COVID symptomscorrelated strongly with corneal nerve fiber loss, says study author Professor Rayaz Malik in astatement.

He notes that it was an observational study, and as such, cant establish cause, and only a small number of participants were involved.

To the best of our knowledge, this is the first study reporting corneal nerve loss and an increase in [dendritic cell] densityin patients who have recoveredfrom COVID-19, especially in subjects with persisting symptoms consistent with long COVID, he adds. We show that patients with long COVID have evidence of small nerve fiber damage which relates to the severity of long COVID and neuropathic as well as musculoskeletal symptoms. Corneal confocal microscopy may have clinical utility as a rapid objective ophthalmic test to evaluate patients with long COVID.

South West News Service writer Stephen Beech contributed to this report.

Continue reading here:
Eye scan could determine whether COVID patients will be long haulers - WGNO New Orleans

This entry was posted on August 17, 2021 at 1:49 am and is filed under Neuropathy. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed. |