Evidence map›Paper›PMID 34420245›Full record

ArticleMycoses2021

Is there an association between zinc and COVID-19-associated mucormycosis? Results of an experimental and clinical study.

Valliappan Muthu, Mohan Kumar, Raees A Paul, Deepy Zohmangaihi, Hansraj Choudhary, Shivaprakash M Rudramurthy, Naresh K Panda, Ashok Kumar Pannu, Navneet Sharma, Sadhna Sharma and 2 more

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In one paragraph

Article in Mycoses, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 2 pooled it
2.6field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed, 2 syntheses or guidelines pooled it, 44 citations in OpenAlex.

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  10. Mucormycosis in COVID-19: The Indian scenario.Journal de mycologie medicale · 2022
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 1 institution in 1 country.

Valliappan MuthuDepartment of Pulmonary Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Mohan KumarDepartment of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Raees A PaulDepartment of Medical Microbiology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Deepy ZohmangaihiDepartment of Biochemistry, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Hansraj ChoudharyDepartment of Medical Microbiology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Shivaprakash M RudramurthyDepartment of Medical Microbiology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.ORCID https://orcid.org/0000-0002-9097-9253
Naresh K PandaDepartment of Otolaryngology and Head and Neck Surgery, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Ashok Kumar PannuDepartment of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Navneet SharmaDepartment of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Sadhna SharmaDepartment of Biochemistry, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Arunaloke ChakrabartiDepartment of Medical Microbiology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Ritesh AgarwalDepartment of Pulmonary Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.ORCID https://orcid.org/0000-0003-2547-7668
Post Graduate Institute of Medical Education and Research · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe enormous increase in COVID-19-associated mucormycosis (CAM) in India lacks an explanation. Zinc supplementation during COVID-19 management is speculated as a contributor to mucormycosis. We conducted an experimental and clinical study to explore the association of zinc and mucormycosis.

methodsWe inoculated pure isolates of Rhizopus arrhizus obtained from subjects with CAM on dichloran rose Bengal chloramphenicol (DRBC) agar enriched with (three different concentrations) and without zinc. At 24 h, we counted the viable colonies and measured the dry weight of colonies at 24, 48 and 72 h. We also compared the clinical features and serum zinc levels in 29 CAM cases and 28 COVID-19 subjects without mucormycosis (controls).

resultsWe tested eight isolates of R arrhizus and noted a visible increase in growth in zinc-enriched media. A viable count percentage showed a significantly increased growth in four of the eight isolates in zinc-augmented DRBC agar. A time- and concentration-dependent increase in the mean fungal biomass with zinc was observed in all three isolates tested. We enrolled 29 cases of CAM and 28 controls. The mean serum zinc concentration was below the reference range in all the subjects and was not significantly different between the cases and controls.

conclusionsHalf of the R arrhizus isolates grew better with zinc enrichment in vitro. However, our study does not conclusively support the hypothesis that zinc supplementation contributed to the pathogenesis of mucormycosis. More data, both in vitro and in vivo, may resolve the role of zinc in the pathogenesis of CAM.

Indexed as

Case-Control StudiesCOVID-19FemaleHumansIndiaMaleMiddle AgedMucormycosisRhizopus oryzaeSARS-CoV-2Zinc CompoundsZinc CompoundsAspergilluscoronavirus diseaseMucoraleszinczygomycosis

Identifiers

PMID34420245
PMCPMC8661931
OpenAlexW3194124343

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.