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Molecular
Mucormycosis is a serious fungal infection that invades blood vessels and destroys the tissue it infects, most often starting in the sinuses, eye socket, or lungs. The standard way to confirm it combines a tissue biopsy, a stain viewed under a microscope, and a fungal culture, but RT-PCR adds a molecular check on the same tissue sample for the fungus's genetic material. In a comparative study at an Indian hospital that treated a wave of mucormycosis cases during the COVID-19 pandemic, RT-PCR came back positive in about half of confirmed cases, a rate statistically linked to what culture found on the same specimens. It's used alongside biopsy and culture, particularly in people with uncontrolled diabetes or recent steroid use.
A positive RT-PCR result on tissue supports a mucormycosis diagnosis and, combined with the biopsy findings, usually prompts urgent treatment, since this infection can spread quickly through blood vessels once established. A negative result doesn't rule mucormycosis out on its own: in the same comparative study, RT-PCR and culture each caught only about half of confirmed cases, so a negative molecular result alongside biopsy or clinical findings that support infection still leads to treatment. Because of this, your doctor reads RT-PCR together with the tissue biopsy and clinical picture rather than as a stand-alone answer.
Mucormycosis is caused by a group of fungi called mucormycetes, found normally in soil and decaying matter. It isn't spread person to person; infection happens when spores are inhaled or enter through broken skin. It invades blood vessels directly, cutting off blood supply to infected tissue and causing rapid local tissue death, most often in the sinuses, eye socket, brain, or lungs. India saw a sharp rise in cases during the COVID-19 pandemic's second wave, largely in people with uncontrolled diabetes or high-dose steroid use.
The traditional diagnostic combination is a tissue biopsy examined under a microscope with a fungal stain, plus a fungal culture to identify the species. RT-PCR adds a molecular test on the same tissue, looking for the fungus's genetic material rather than growing or seeing it directly. A comparative study at an Indian tertiary hospital found RT-PCR and culture each positive in roughly half of tissue samples tested, with a statistically significant link between the two.
No single method catches every case. A frozen section during surgery can be very sensitive but occasionally flags tissue that doesn't hold up on biopsy review, and RT-PCR and culture each miss infected samples. That's why doctors combine biopsy, staining, culture, and RT-PCR rather than relying on one result. Risk concentrates in people with poorly controlled diabetes, recent steroids, organ transplants, or weakened immunity.
Mucormycosis is an infection caused by a group of fungi called mucormycetes that invade blood vessels and cause tissue death. The 'black fungus' name that circulated in the media referred to the dark, dead tissue this infection can cause, most often affecting the sinuses, eye socket, or lungs.
No. It isn't spread from person to person. Infection happens when fungal spores, present normally in soil and decaying matter, are inhaled or enter through broken skin.
People with uncontrolled diabetes, those on high-dose steroids, organ transplant recipients, and anyone with a weakened immune system face the highest risk. India saw a sharp rise in cases during the COVID-19 pandemic's second wave, largely among people with these risk factors.
This page is general information about the test, not medical advice. Your own report's reference ranges apply — please discuss your results with your doctor.
No. In a comparative study, RT-PCR and fungal culture each caught only around half of confirmed cases on their own. A negative RT-PCR alongside a biopsy or clinical picture that still points to infection usually leads to treatment anyway.
No single test here is sensitive enough to rely on alone. Doctors combine a tissue biopsy, microscopic staining, fungal culture, and RT-PCR because each one can catch cases the others miss.
COVID-19 itself doesn't cause mucormycosis, but the combination of uncontrolled diabetes, high-dose steroid treatment, and a weakened immune system in some COVID-19 patients created conditions where the fungus could take hold, which is why India saw a spike in cases during the pandemic's second wave.