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The 'black fungus' hitting India's COVID-19 patients. What is it?

by REUTERS

May 28, 2021 - 8:36 am GMT+3
A villager walks holding an umbrella as dark clouds loom overhead in Balasore district in Odisha, India, Tuesday, May 25, 2021. (AP Photo)
A villager walks holding an umbrella as dark clouds loom overhead in Balasore district in Odisha, India, Tuesday, May 25, 2021. (AP Photo)
by REUTERS May 28, 2021 8:36 am

India, already deeply engaged in battling the second wave of COVID-19 infections, has seen its health care system blindsided by a rapid rise in cases of mucormycosis, also known as black fungus.

The following lays out information about mucormycosis, opinions from health experts and the scientific evidence behind what could be driving the recent rise in cases.

What is mucormycosis?

Mucormycosis is a fungal infection that causes blackening or discoloration over the nose, blurred or double vision, chest pain, breathing difficulties and coughing blood.

The disease has a close link to diabetes and conditions that compromise the immune system. Experts have said that an overuse during the COVID-19 pandemic of certain drugs that suppress the immune system could be causing the surge.

Data from the U.S. Centers for Disease Control and Prevention (CDC) shows that mucormycosis has a mortality rate of 54%, which can vary depending on the condition of the patients and the body part affected.

States across India have reported more than 5,000 cases of the otherwise rare disease in recent weeks, mostly in people infected with COVID-19 or recovering from the disease.

Is it contagious?

The disease is not contagious, which means that it cannot spread from contact between humans or animals. But it does spread from fungal spores that are present in the air or in the environment, which are almost impossible to avoid.

"Bacteria and fungi are present in our bodies already, but they are kept in check by the body’s immune system," said K Bhujang Shetty, head of Narayana Nethralaya, a specialty eye hospital. "When the immune system goes down because of cancer treatment, diabetes or use of steroids, then these organisms get an upper hand and they multiply," said Shetty.

Is the use of unsanitized oxygen cylinders or ventilators causing the outbreak?

It is hard to say.

Experts say that unsanitary conditions could increase the risk of developing infections.

"There is a lot of contamination in the pipes used for oxygen, the cylinders that are being used, the humidifiers used," said Nishant Kumar, an ophthalmologist at Hinduja Hospital in Mumbai.

"If you are immuno-suppressed, and you have been on these pipes and oxygen for a long period of time, then these infections get much more of an opportunity to get in."

But opinion is divided on this point.

"Hospitals were dirty even before April. We need epidemiological studies to assess why these cases are rising now," said S.P. Kalantri, senior doctor and researcher at the Mahatma Gandhi Institute of Medical Sciences in Maharashtra.

Why mucormycosis and not other fungal infections?

COVID-19 has been associated with a wide range of secondary bacterial and fungal infections, but experts say India's second wave of COVID-19 has created a perfect environment for mucormycosis.

Low oxygen, diabetes, high iron levels, immuno-suppression, coupled with several other factors including prolonged hospitalization with mechanical ventilators, create an ideal environment for contracting mucormycosis, researchers wrote in the journal Diabetes & Metabolic Syndrome: Clinical Research & Reviews.

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