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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, May 1: As Mumbai link surfacing in some COVID-19 cases in Mandya district in Karnataka, JDS leader and former chief minister H D Kumaraswamy on Friday blamed the district administration for the situation, accusing it of not quarantining 7,000 labourers who 'returned' from the Maharashtra capital.

"The information we have is that there are about 16,000 labourers from Mandya were working in Mumbai of which 7,000 people reached the district. None of them was quarantined properly," Kumaraswamy told reporters in Bengaluru.

He claimed the district, a stronghold of JDS, was staring at a major spurt in cases due to the careless attitude of the district administration. "Government should initiate action against those who are responsible for the laxity," he said.

However, he did not specify when the 7,000 workers returned to Mandya. When asked about Kumaraswamy's claim, officials said they have to verify it. Of the eight cases reported from Mandya on Friday, three had a travel history to Mumbai, a major COVID-19 hotspot in the country, officials said.

A Health Department official said four of the fresh cases were contacts of a patient who tested positive on April 8 and admitted to a hospital. After weeks of coming in contact with him, the four were confirmed for COVID-19, an official said. The Three people with travel history to Mumbai had, in fact, brought the body of a man who died of a heart attack there on April 24, the official added.