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San Diego, Apr 15: Several people lost their sense of smell or taste weeks ago globally and are still waiting for it to come back and now, researchers have identified an association between sensory loss and novel coronavirus 2019 (COVID-19) infection, indicating that loss of smell and taste may be considered as early symptoms of the deadly disease.

Interestingly, the study also found that persons who reported experiencing a sore throat more often tested negative for COVID-19.

The team from University of California-San Diego found high prevalence and unique presentation of certain sensory impairments in patients positive with COVID-19.

Of those who reported a loss of smell and taste, the loss was typically profound, not mild.

"Based on our study, if you have smell and taste loss, you are more than 10 times more likely to have COVID-19 infection than other causes of infection. The most common first sign of a COVID-19 infection remains fever, but fatigue and loss of smell and taste follow as other very common initial symptoms," explained study researcher Carol Yan from UC San Diego.

"We know COVID-19 is an extremely contagious virus. This study supports the need to be aware of smell and taste loss as early signs of COVID-19," Yan added.

For the findings, published in the journal International Forum of Allergy and Rhinology, the research team surveyed 1,480 patients with flu-like symptoms and concerns regarding potential COVID-19 infection who underwent testing at UC San Diego Health from March 3 through March 29, 2020.

Within that total, 102 patients tested positive for the virus and 1,378 tested negatives. The study included responses from 59 COVID-19-positive patients and 203 COVID-19-negative patients.

Encouragingly, the rate of recovery of smell and taste was high and occurred usually within two to four weeks of infection.

"Our study not only showed that the high incidence of smell and taste is specific to COVID-19 infection but we fortunately also found that for the majority of people sensory recovery was generally rapid," said Yan.

"Among the COVID-19 patients with smell loss, more than 70 per cent had reported improvement of smell at the time of the survey and of those who hadn't reported improvement, many had only been diagnosed recently," she added.

Sensory return typically matched the timing of disease recovery.

In an effort to decrease the risk of virus transmission, UC San Diego Health now includes loss of smell and taste as a screening requirement for visitors and staff, as well as a marker for testing patients who may be positive for the virus.

"It is our hope that with these findings other institutions will follow suit and not only list smell and taste loss as a symptom of COVID-19, but use it as a screening measure for the virus across the world," Yan said.

Bengaluru, Jul 23: Karnataka on Thursday recorded a biggest single-day surge of over 5,000 cases and 97 related fatalities, taking the total number of people who tested positive for the virus to 80,863, the health department said. 

The day also saw a record 2,071 patients getting discharged after recovery.

Out of 5,030 fresh cases reported, a whopping 2,207 cases were from Bengaluru urban alone.

As of July 23 evening, cumulatively 80,863 Covid-19 positive cases have been confirmed in the state, which includes 1,616 deaths and 29,310 discharges, the health department said in its bulletin.

It said, out of 49,931 active cases, 49,291 patients are in isolation at designated hospitals and are stable, while 640 are in ICU. Out of the 97 deaths reported on Thursday 48 are from Bengaluru urban, followed by Mysuru 8, Dakshina Kannada 7 and others.

Most of the dead are either with a history of Severe Acute Respiratory Infection (SARI) or Influenza-like illness (ILI).

Among the districts where the new cases were reported, Bengaluru urban accounts for 2,207, followed by Raichur 258, Kalaburagi 229, Dakshina Kannada 218, and others.

Bengaluru urban district tops the list of positive cases, with a total of 39,200 infections, followed by Dakshina Kannada 4,209 and Kalaburagi 3,370.