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A loss of a sense of smell or taste may be a symptom of COVID-19, medical groups representing ear, nose and throat specialists have warned.

Citing a growing number of cases around the globe, the American Academy of Otolaryngology – Head and Neck Surgery and ENT UK each issued warnings about patients who tested positive for the new coronavirus with the only symptom being a lost or altered sense of smell or taste.

“Anecdotal evidence is rapidly accumulating from sites around the world that anosmia and dysgeusia are significant symptoms associated with the COVID-19 pandemic,” the American Academy of Otolaryngology – Head and Neck Surgery wrote in a statement.

Anosmia is the loss of smell while dysgeusia is an altered sense of taste.

South Korea, China and Italy have all reported “significant numbers” of known COVID-19 patients with lost or reduced sense of smell, according to joint statement by Claire Hopkins, president of the British Rhinological Society, and Nirmal Kumar, president of ENT UK.

“In Germany it is reported that more than 2 in 3 confirmed cases have anosmia. In South Korea, where testing has been more widespread, 30% of patients testing positive have had anosmia as their major presenting symptom in otherwise mild cases,” they wrote.

The American Academy of Otolaryngology – Head and Neck Surgery advised that these symptoms should be added to the list for screening patients for possible COVID-19 infection, and ENT UK said the symptoms should signal to health care professionals treating a patient to wear full personal protective equipment.

While another viral infection or seasonal allergies could cause the loss of smell or taste, experiencing the symptoms without other respiratory illnesses warrants “serious consideration for self-isolation and testing of these individuals,” the American group said.

Some patients have experienced the symptom early on in COVID-19 illnesses, while others experience it further into the illness, according to Dr. James C. Denneny III, executive vice president and CEO of the American Academy of Otolaryngology – Head and Neck Surgery.

“The symptoms are clearly not as common as cough, fever and shortness of breath, but in the absence of a known cause for the smell disorder, this symptom may be an additional identifier for infected patients,” he told USA TODAY in a statement.

Noelle Ruiz, 27, first experienced a 101-degree fever, which subsided after about a day. Within six days, though, a headache and cough developed into more serious symptoms, with chest pain, extreme fatigue and the inability to catch her breath.

“I couldn’t really take a deep breath, I didn’t feel like I had enough air in my lungs,” she said.

But Ruiz had another set of symptoms: “I lost taste, food wasn’t appetizing, I couldn’t smell anything.”

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