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Everything You Need to Know About Mucormycosis - 'The Black Fungus'

Published on May 18, 2021 and last reviewed on May 11, 2022   -  5 min read


Black fungus, otherwise called Mucormycosis, is a possibly fatal fungal infection, rare but reported in some patients who recovered from COVID. Read the article to know about its causes and treatment.

Everything You Need to Know About Mucormycosis - 'The Black Fungus'


Mucormycosis is a fungal infection caused by a group of molds called mucormycetes. It is also known as Zygomycosis. It is a serious but rare fungal infection. It usually affects the sinuses or the lungs after inhaling fungal spores from the air. It mainly affects people with comorbidities or those who have weakened immunity.

What Are Mucormycetes?

Mucormycetes are a group of fungi that cause fungal infection. It is usually present throughout the environment, especially in the soil, and in association with decaying organic matter such as leaves and animal dung. They are more commonly seen in soil than in the air and seen mostly during summer than in winter. These fungi are not harmful to most people.

What Are the Other Types of Fungi That Causes Mucormycosis?

There are many different types of fungi that belong to the scientific order Mucorales and cause mucormycosis. The most common types are:

The other types of fungi that cause mucormycosis are:

Who Is More Prone to Mucormycosis?

People who are more likely to get Mucormycosis are the

How Do People Get Mucormycosis?

Mucormycetes are present throughout the environment. When people come in contact with these mucormycetes, they inhale the fungal spores from the air. It mainly affects the lungs and sinuses. It can also cause a skin infection when fungus enters the skin through a cut or through any other type of skin injury.

Is Mucormycosis Contagious?

Mucormycosis usually does not spread from person to person. It also does not spread between people and animals.

What Are the Signs and Symptoms of Mucormycosis?

There are five clinical forms of mucormycosis in which; the two most common clinical forms are:

And the other clinical forms are:

1) Rhinocerebral Mucormycosis:

Rhinocerebral mucormycosis starts as an infection in the sinus and then leads to swelling of the nerves in the brain. It causes blood clots in the brain. It is a fungal infection that involves the sinus and the brain. It is commonly seen in patients with diabetes, neutropenic patients, and renal transplants.

The symptoms seen are-

2) Pulmonary Mucormycosis:

Pulmonary mucormycosis is a lung infection. The common symptoms of pulmonary mucormycosis are-

3) Gastrointestinal Mucormycosis:

Gastrointestinal mucormycosis is less common than the other types of mucormycosis. It occurs after the ingestion of the organism. It usually occurs in malnourished patients and premature children. The parts that are affected are-

The symptoms are-

It is usually challenging to diagnose as it has similar clinical features as necrotizing enterocolitis (a disease that affects the newborn’s intestines).

4) Cutaneous (Skin) Mucormycosis:

Mucormycosis may appear as small blisters or ulcers. This infected region turns black in color. The symptoms seen are-

5) Disseminated Mucormycosis:

Disseminated mucormycosis occurs in people who are already suffering from other medical illnesses as the symptoms become difficult to diagnose if it is related to mucormycosis or any other existing medical illnesses. There are chances of a coma state for patients with disseminated mucormycosis in the brain.

How Is Mucormycosis Usually Diagnosed?

The healthcare professionals consider the previous medical conditions and the clinical symptoms. A sample of fluid is collected from the lungs or sinuses and sent to the laboratory to detect the fungal species.

Doctors may also perform a tissue biopsy if needed.

Imaging tests like CT (computed tomography) scans of lungs and sinuses can be recommended depending on the area of mucormycosis.

What Is the Treatment for Mucormycosis?

Mucormycosis is treated with antifungal drugs. It can be given either intravenously or orally. The drugs that are given intravenously are:

Isavuconazole and Posaconazole can also be given orally.

There are certain drugs that cannot treat mucormycosis. It includes:

But the drugs should be taken only after the doctor’s consultation.

If necessary surgical debridement or resection can be recommended, particularly for rhinocerebral, cutaneous, and gastrointestinal mucormycosis.

How Is the Prognosis of Mucormycosis?

The prognosis of mucormycosis depends on the overall health condition of the patient and the body’s response to the treatment. Early diagnosis and treatment can give better outcomes, but if not treated or identified early, the overall mortality rate is 50 %.

How Can Mucormycosis Be Prevented?

As mucormycetes are present throughout the environment, it is difficult to avoid inhaling the fungal spores from the air. There is also no vaccine available to prevent mucormycosis. People with weakened immunity or other medical conditions or illnesses can follow these steps to lower the chances of mucormycosis.

Why Is Mucormycosis Seen in COVID-19 Patients?

Studies show that mucormycosis is seen in a few COVID patients. COVID-19 is a severe disease caused by SARS-CoV-2 and commonly occurs in patients with weak immunity and also elderly patients. Elderly patients are more likely to have medical conditions like diabetes, hypertension, and other renal issues, which makes them more prone to opportunistic fungal infections like mucormycosis. It is becausethe fungal spores (Mucor species) grow well in an environment (host) with the following characteristics:

In addition, the health experts consider steroids a life-saving treatment for severe and critically ill COVID-19 patients, whereas steroids suppress immunity and triggers mucormycosis; and the overall mortality rate of mucormycosis is 50 %. Therefore, the above-mentioned factors increase the risk of mucormycosis inCOVID patients.


Mucormycosis is a rare but serious fungal infection. Early diagnosis, predisposing risk factors, and appropriate treatment, which includes prompt prescription and administration of antifungal medications, can have a better prognosis and outcomes. In addition, vaccination against COVID-19 should be encouraged with prompt management of diabetes, hypertension, and other renal abnormalities in patients to decrease the risk of mucormycosis.

Frequently Asked Questions


Can Mucormycosis Be Cured?

Mucormycosis is a fungal infection that is treated with prescribed antifungal medications usually:
- Amphotericin B.
- Posaconazole.
- Isavuconazole.
Mucormycosis sometimes needs to be treated with surgery to remove the infected tissue.


Which Are the Common Locations of Mucormycosis?

Mucormycosis affects the sinus, brain, gastrointestinal system, lungs, skin, and sometimes it spreads to the kidneys.


What Are the Different Types of Mucormycosis?

There are different types of mucormycosis, and they are
- Rhinocerebral mucormycosis- It affects the sinus and the brain.
- Pulmonary mucormycosis- It affects the lungs.
- Gastrointestinal mucormycosis- It affects the gastrointestinal system.
- Cutaneous mucormycosis- It affects the skin.
- Disseminated mucormycosis- It occurs when the infection spreads through the bloodstream to the other parts of the body. It commonly affects the brain, spleen, heart, and skin.


How Do You Test For Mucormycosis?

The healthcare professionals record your symptoms, physical examinations, medical history, and laboratory tests for the diagnosis of mucormycosis. If they suspect mucormycosis in the lungs, they may collect the sample of fluid and send it to the laboratory for diagnosis. They may also perform a tissue biopsy if needed. Sometimes CT scan for lungs, sinuses, and other parts of the body may be recommended depending on the site of the fungal infection.


How Long Can You Live With Mucormycosis?

Mucormycosis has a poor prognosis with a mortality rate of 17-51%. If the diagnosis is delayed, the mortality rate can be higher. Surgical treatment associated with antifungal medicine can improve the prognosis.


What Does Mucormycosis Look Like?

Cutaneous (skin) mucormycosis may look like small blisters or ulcers, and the infected area turns black.
- The symptoms of Rhinocerebral mucormycosis are:
One-sided facial swelling
Black-colored lesions on the nasal bridge or inside the mouth.
- The symptoms of pulmonary mucormycosis are:
Shortness of breath
Chest pain
- The symptoms of gastrointestinal mucormycosis are:
Abdominal pain
Abdominal bleeding.


How Fast Does Mucormycosis Progress?

Once established, the fungi multiply rapidly in the blood vessel walls, which cuts the blood flow to the tissues resulting in tissue destruction. If this spread of fungal infection is not stopped, it can even lead to death.


Who Is At Risk of Mucormycosis?

The infection is common among people who have weakened immune systems. There are various risk factors like
- Uncontrolled diabetes
- Skin cuts or injuries or burns
- Cancer
- Organ Transplant
- Low Blood Cell Count (Neutropenia).


Is Black Fungus Dangerous?

Black fungus is a rare infection, and it can turn dangerous if left untreated. Once you are diagnosed with mucormycosis, start the treatment immediately. Delaying the treatment can increase the complications.


Is Black Fungus Contagious?

No, black fungus is not contagious, and it mainly affects the persons who are on prolonged steroids and immunocompromised individuals. The possibility of spreading the infection from person to person or through oxygenation, humidifier, or water are considered myths of black fungus.


What Is Mucormycosis Infection?

Mucormycosis is a rare but serious infection caused by a group of fungi called Mucormycetes that lives throughout the environment. It is also called Zygomycosis. It is seen in people who have weak immune systems or any other health illnesses. It affects the sinuses or lungs after inhaling the fungal spores from the air. It also looks like small blisters or ulcers on the skin after a cut or injury, or burn.


How Does the Black Fungus Spread?

Black fungus is a fungal infection that is caused by Mucormycetes. It is present throughout the environment, particularly in the soil rather than in the air, associated with dead and decayed organic matter such as leaves, compost, and animal dung. It enters the body when the fungal spores from the air are inhaled. It then causes an infection in the sinuses and lungs and later spreads to different parts of the body.


Can Coronavirus Disease Spread Through Feces?

Certain evidence shows that COVID-19 infection can lead to intestinal infection and be present in feces. There are no reports saying about the fecal-oral transmission of coronavirus.

Article Resources

Last reviewed at:
11 May 2022  -  5 min read




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