Search Results


No Result Found.

Fact Check: Can black powder-like fungus inside onions and refrigerators spread mucormycosis?

  • Share


The black color fungus in refrigerators and the fungus seen on the outer layers of onions are different from the one which causes mucormycosis.

As India battles with a new surge of mucormycosis black fungus cases, there's also a lot of misinformation about the infection that is being shared on social media. 

Amid this, a post is getting viral on social media with a claim that the formation of fungus in refrigerators and the fungus seen on the outer layers of onions cause mucormycosis.

A Facebook user name Wisdom shared a post with the message “Beware of domestic black fungus. At times when you purchase onions, you must have noticed a black layer on them. Actually, this is the black fungus. The black film seen on the rubber inside refrigerators is the black fungus that causes mucormycosis. If ignored, this black fungus can easily enter your body through food items stored inside the refrigerator." (Translated from Hindi)

The same post is also widely shared on Twitter

Fact Check

In our investigation, we found that the viral claim is misleading. The black powder-like fungus on onions and inside a refrigerator is different from the one which causes mucormycosis.

What is that fungus inside your fridge?

The fungi that are found in refrigerators are caused by bacteria and yeast. Though it could contaminate the food that is stored in the refrigerators, causing other mild infections, it does not lead to the black fungal infection.

Molds are a microscopic type of fungi, which unlike the unicellular microscopic yeasts or the macroscopic multicellular mushrooms, are characterized by the presence of multicellular filaments called hyphae. The network formed by the hyphae constitutes the mycelium which is visible to the naked eye.

According to the website of mold advisor, the black mold found inside refrigerators is Stachybotrys Chartarum. 

As per the United States Centers for Disease Control and Prevention, Stachybotrys Chartarum is a greenish-black mold. It can grow on material with a high cellulose content. Stachybotrys Chartarum and other molds may cause health symptoms that are nonspecific. However, if Stachybotrys Chartarum or other molds are found they should be removed.

What is the black powder-like fungus on onions?

According to the US department of agriculture, Black mold on onion is caused by aspergillus niger, a common fungus in the soil. To discourage mold growth, store onions in the refrigerator for up to two months. Rinse off small amounts of the black mold on the outer scales of the onion under cool, running tap water or cut off the affected layers. The unaffected part can be used. Persons known to be allergic to Aspergillus niger should not use onions with black mold.

What is the Black fungus infection?

According to US Centers for Disease Control and Prevention, Mucormycosis (previously called zygomycosis) is a serious but rare fungal infection caused by a group of molds called mucormycetes. These molds live throughout the environment. Mucormycosis mainly affects people who have health problems or take medicines that lower the body’s ability to fight germs and sickness. It most commonly affects the sinuses or the lungs after inhaling fungal spores from the air. It can also occur on the skin after a cut, burn, or other types of skin injury.

However, according to a report of news18, the AIIMS director said, “The most important thing to remember is that mucormycosis is not a black fungus. It is a misnomer… because there is some discoloration of the skin as it decreases blood supply, it may give a feeling that the area has become black, that is why the name has come."

In conclusion, the viral claim is false that the black color fungus in refrigerators and the fungus seen on the outer layers of onions cause mucormycosis. The black powder-like fungus on onions and inside a refrigerator is different from the one which causes mucormycosis. Experts say that mucormycosis and black fungus are not the same.

Note: You can reach out to us at support[at] if you find any issue with our articles.


{{comment.user.fname}} {{comment.user.lname}}, {{}}



Please Login or signup to share your views on this article

Support Fact Hunt




Fact check:  No, PM Modi did not spend Rs 100 crores on his food in his tenure as PM
by Himani Joshi 2021-06-24 07:59:50
Fact Check: Former BJP Minister Vijay Goel shared 12-yr-old image of Delhi water crisis as recent.
by Himani Joshi 2021-06-20 15:31:30
Fact Check: Truth behind the viral video of PM Modi’s Saying he used to steal in his childhood
by Himani Joshi 2021-06-20 11:57:57
Fact Check: A satirical article claiming thousands of mosquitoes injected with Viagra escaped from a lab in Wuhan viral
by Himani Joshi 2021-06-19 15:32:42
Fact Check: Old video of a man vandalising statue in Algeria goes viral as of Italy
by Kashish Khurana 2021-06-18 19:49:19
Fact Check: Video of group clash from Delhi falsely linked to Ghaziabad’s Loni incident.
by Himani Joshi 2021-06-18 10:07:07
Fact Check: The viral claim is false that anesthetics can kill vaccinated people
by Himani Joshi 2021-06-17 12:09:15
Fact Check: Clip from a short film passed off as soldier bidding farewell to his family
by Himani Joshi 2021-06-17 08:34:07
Fact Check: Bharat Biotech uses 'calf serum' to make Covaxin? Here's The Truth
by Himani Joshi 2021-06-16 10:52:51
Fact Check: No, PM Modi didn't change his clothes four times a day to meet different leaders
by Himani Joshi 2021-06-16 09:20:57
Altnews co-founder Md Zubair amplified the fake communal angle in Abdul Samad case in Ghaziabad
by FactHunt Admin 2021-06-15 19:27:32
Fact Check: The truth behind the viral video of demolition drive in J&K linked to Rohingyas
by Kashish Khurana 2021-06-14 16:29:09
Fact Check: Morphed image falsely shared to show MP Sanjay Raut making tea for PM Modi
by Himani Joshi 2021-06-14 13:19:52
Fact Check: Social media claims that UP will be bifurcated into three states? Here is The Truth
by Himani Joshi 2021-06-14 12:00:33
Fact Check: Did 'Pakistani media' praise the government of India?
by Himani Joshi 2021-06-12 08:22:18
Fact Check: Can Google Meet Hosts see apps participants are using? Here is The Truth
by Himani Joshi 2021-06-12 07:07:36
Fact Check: The truth behind the video of Bangladeshi Muslims of Assam demanding a separate country
by Kashish Khurana 2021-06-11 19:00:21
Fact Check: Picture of a Bangladeshi young man passed off as a man failed UPSC due to reservation
by Anwesha Mishra 2021-06-10 06:37:46
Fact Check: Morphed image of a signboard that read "Eating carpet strictly prohibited" at the airport went viral
by Himani Joshi 2021-06-10 05:56:38
Fact Check: Is really a vaccinated bride seeking a vaccinated groom? What's the truth behind this ad?
by Kashish Khurana 2021-06-09 20:29:32

Mobile App

Available for Android


Subscribe to our newsletter to get notification about new fact checks, feature updates, etc..