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2024•Indian Journal of Medical MicrobiologyOpen access

An interesting report of COVID-19 associated mucormycosis (CAM) cases by two different species of Mucorales

Harsimran Kaur, Rimjhim Kanaujia, Gyanaranjan Nayak, Anurag Snehi Ramavat, Sourabha Kumar Patro, Anup Ghosh, Arunaloke Chakrabarti, Shivaprakash M. Rudramurthy

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Abstract

During surge of COVID-19-associated mucormycosis (CAM), we identified five cases of CAM where two different species of Mucorales were isolated. All had history of diabetes mellitus and presented with clinical features suggesting rhino-orbital mucormycosis. The patients grew different species from their nasal scraping/biopsy samples, Rhizopus arrhizus, R. homothallicus (n = 2); R. homothallicus, Lictheimia corymbifera (n = 1); R. arrhizus, Mucor spp (n = 1); and L. corymbifera, Apophysomyces variabilis (n = 1). All patients underwent surgical and medical (liposomal amphotericin B) treatment. All, except one growing A. variabilis and L. corymbifera survived. Mixed infection by more than one Mucorales in CAM is unique and warrants epidemiological investigation.

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What this paper is about

During surge of COVID-19-associated mucormycosis (CAM), we identified five cases of CAM where two different species of Mucorales were isolated. All had history of diabetes mellitus and presented with clinical features suggesting rhino-orbital mucormycosis. The patients grew different species from their nasal scraping/biopsy samples, Rhizopus arrhizus, R. homothallicus (n = 2); R. homothallicus, Lictheimia corymbifera (n = 1); R. arrhizus, Mucor spp (n = 1); and L. corymbifera, Apophysomyces variabilis (n = 1). All patients underwent surgical and medical (liposomal amphotericin B) treatment. All, except one growing A. variabilis and L. corymbifera survived. Mixed infection by more than one Mucorales in CAM is unique and warrants epidemiological investigation.

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Available abstract

During surge of COVID-19-associated mucormycosis (CAM), we identified five cases of CAM where two different species of Mucorales were isolated. All had history of diabetes mellitus and presented with clinical features suggesting rhino-orbital mucormycosis. The patients grew different species from their nasal scraping/biopsy samples, Rhizopus arrhizus, R. homothallicus (n = 2); R. homothallicus, Lictheimia corymbifera (n = 1); R. arrhizus, Mucor spp (n = 1); and L. corymbifera, Apophysomyces variabilis (n = 1). All patients underwent surgical and medical (liposomal amphotericin B) treatment. All, except one growing A. variabilis and L. corymbifera survived. Mixed infection by more than one Mucorales in CAM is unique and warrants epidemiological investigation.

Key concepts: Mucorales, Mucormycosis, Rhizopus arrhizus, Zygomycosis, Mucor circinelloides, Rhizopus, Biology, Amphotericin B

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