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Zhang M, Song G, Zheng H, Pathakumari B, Liu W, Liang G. In vitro combination with doxycycline plus antifungals against clinical Mucorales pathogens. Braz J Microbiol 2023; 54:2597-2602. [PMID: 37934403 PMCID: PMC10689593 DOI: 10.1007/s42770-023-01167-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 10/19/2023] [Indexed: 11/08/2023] Open
Abstract
PURPOSE Since systematic antifungals for mucormycosis showed variable MICs depending on strains, effective and safe antifungal therapy was still needed. This study is aimed to evaluate the in vitro activity of doxycycline combined with antifungal therapy against dominant Mucorales pathogens. METHODS Multidrug susceptibility testing was performed with doxycycline and antifungals, including itraconazole, posaconazole, and amphotericin, in 21 isolates of 8 dominant Mucorales pathogens. RESULTS The fractional inhibitory concentration index according to M38 showed one Rhizopus arrhizus isolate synergic (∑FICI = 0.375) and other isolates in addition (0.5 < ∑FICI < 4). CONCLUSIONS Doxycycline was found to have in vitro advantages in combined antifungal treatment over antifungals alone.
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Affiliation(s)
- Meijie Zhang
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Ge Song
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China
- Department of Dermatology, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
| | - Hailin Zheng
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, 211166, China
- CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, 210042, China
| | - Balaji Pathakumari
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mayo Clinic, Rochester, MN, 55901, USA
| | - Weida Liu
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China.
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, 211166, China.
- CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, 210042, China.
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China.
| | - Guanzhao Liang
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China.
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, 211166, China.
- CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, 210042, China.
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Zhang M, Xu W, Mei H, Song G, Ge N, Tao Y, Liu W, Liang G. Comparative genomics predict specific genes in potential mucorales identification. Arch Microbiol 2023; 205:320. [PMID: 37640972 DOI: 10.1007/s00203-023-03659-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/03/2023] [Accepted: 08/13/2023] [Indexed: 08/31/2023]
Abstract
Mucoralean fungi could cause mucormycosis in humans, particularly in immunodeficient individuals and those with diabetes mellitus or trauma. With plenty of species and genera, their molecular identification and pathogenicity have a large deviation. Reported cases of mucormycosis showed frequent occurrence in Rhizopus species, Mucor species, and Lichtheimia species. We analyzed the whole genome sequences of 25 species of the top 10 Mucorales genera, along with another 22 important pathogenic non-Mucorales species, to dig the target genes for monitoring Mucorales species and identify potential genomic imprints of virulence in them. Mucorales-specific genes have been found in various orthogroups extracted by Python script, while genus-specific genes were annotated covering cellular structure, biochemistry metabolism, molecular processing, and signal transduction. Proteins related to the virulence of Mucorales species varied with distinct significance in copy numbers, in which Orthofinder was conducted. Based on our fresh retrospective analysis of mucormycosis, a comparative genomic analysis of pathogenic Mucorales was conducted in more frequent pathogens. Specific orthologs between Mucorales and non-Mucoralean pathogenic fungi were discussed in detail. Referring to the previously reported virulence proteins, we included more frequent pathogenic Mucorales and compared them in Mucorales species and non-Mucorales species. Besides, more samples are needed to further verify the potential target genes.
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Affiliation(s)
- Meijie Zhang
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China
- Department of Dermatology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Wenqi Xu
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, 210042, China
| | - Huan Mei
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, 210042, China
| | - Ge Song
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China
- Department of Dermatology, Beijing Shijitan Hospital, Capital Medical University, Beijing, 100038, China
| | - Naicen Ge
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, 210042, China
- CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, 210042, China
| | - Ye Tao
- Shanghai Biozeron Biotechnology Co., Ltd, Shanghai, 201800, China
| | - Weida Liu
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China.
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, China.
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, 210042, China.
- CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, 210042, China.
| | - Guanzhao Liang
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, 210042, China.
- Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, 210042, China.
- CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, 210042, China.
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Liang G, Zhang M, Xu W, Wang X, Zheng H, Mei H, Liu W. Characterization of mitogenomes from four Mucorales species and insights into pathogenicity. Mycoses 2021; 65:45-56. [PMID: 34570921 DOI: 10.1111/myc.13374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Mucorales, as one major order of Zygomycetes fungi, can infect human beings and cause serious consequence. We have noticed the pathogenicity of Mucorales is closely related to energy metabolism, while mitochondria play the role of energy factories in almost all biological activities. METHODS Virulence of M irregularis, M hiemalis, L corymbifera and R arrhizus were verified in Galleria mellonella larvae, as well as mitochondrial gene copies analysed with RT-qPCR. Mitogenomes of the four Mucorales species were sequenced based on illumina NovaSeq technology to study their characteristic features and functional regions. RESULTS Variant virulence of M irregularis, M hiemalis, L corymbifera and R arrhizu were verified by clinical retrospective data and our G mellonella infection models, also copies of mitochondrial genes indicated the significant associations with pathogenicity. A total of 274.18 clean reads were generated to be assembled; the complete mitogenomes of the four Mucorales species were obtained with totally different length. After the genomes annotated and compared, M irregularis was found more similar with M hiemalis than those of L corymbifera and R arrhizus, especially the small (rrns) and large (rrnl) subunits of mitochondrial ribosomal RNA (rRNA) genes. The GC content, ncRNAs and the distribution of the SNPs and InDels were also compared, and the GC content rate of fungi seems to be related to the fungal thermal adaptability. In addition, linear mitogenomes of these four Mucorales showed diverse arrangements of orf genes and directionality of some conserved gene elements. CONCLUSION This study uncovered the pathogenicity variances among the four Mucorales species and the relationship between their mitogenomic features and clinical pathogenicity. Further studies like spatial structure of mitochondrial genomes and the comprehensive analysis of transcription regulation are needed.
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Affiliation(s)
- Guanzhao Liang
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, China.,CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - Meijie Zhang
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, China.,CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - Wenqi Xu
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, China.,CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - Xiaowen Wang
- Shanghai BIOZERON Biotechnology Co., Ltd., Shanghai, China
| | - Hailin Zheng
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, China.,CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - Huan Mei
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, China.,CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - Weida Liu
- Department of Medical Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, China.,CAMS Collection Center of Pathogen Microorganisms-D (CAMS-CCPM-D), Nanjing, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China.,Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
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Vacuum-Assisted Closure and Skin Grafting Combined with Amphotericin B for Successful Treatment of an Immunocompromised Patient with Cutaneous Mucormycosis Caused by Mucor irregularis: A Case Report and Literature Review. Mycopathologia 2021; 186:449-459. [PMID: 34131870 DOI: 10.1007/s11046-021-00551-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 03/23/2021] [Indexed: 10/20/2022]
Abstract
Cutaneous mucormycosis caused by Mucor irregularis (M. irregularis) is a rare condition that typically occurs in immunocompetent patients. Herein, we describe an immunocompromised patient with cutaneous M. irregularis infection who was successfully treated with debridement combined with vacuum assisted closure (VAC) negative pressure technique and split-thickness skin grafting. We present this case owing to its complexity and rarity and the successful treatment with surgical therapy. A 58-year-old man presented to our hospital with a history of skin ulcers and eschar on the right lower leg since two months. He had been receiving methylprednisolone therapy for bullous pemphigoid that occurred five months prior to the present lesions. Histopathological examination of a right leg lesion showed broad, branching hyphae in the dermis. Fungal culture and subsequent molecular cytogenetic analysis identified the pathogen as M. irregularis. After admission, methylprednisolone was gradually tapered and systemic treatment with amphotericin B (total dose 615 mg) initiated along with others supportive therapies. However, the ulcers showed no improvement, and amphotericin B had to be discontinued owing to development of renal dysfunction. After extensive surgical debridement combined with VAC and skin grafting, his skin ulcers were healed; subsequent fungal cultures of the lesions were negative. The patient exhibited no signs of recurrence at 36-month follow-up. Twenty-six cases with M. irregularis-associated cutaneous mucormycosis in literature were reviewed.
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Ma Y, Wang X, Li R. Cutaneous and subcutaneous fungal infections: recent developments on host-fungus interactions. Curr Opin Microbiol 2021; 62:93-102. [PMID: 34098513 DOI: 10.1016/j.mib.2021.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/27/2021] [Accepted: 05/07/2021] [Indexed: 02/07/2023]
Abstract
The incidence of skin fungal infections is increasing at an alarming rate worldwide, presenting a major challenge to health professionals. Cutaneous and subcutaneous fungal infections are caused by pathogenic or opportunistic organisms varying from mold, yeasts, to dimorphic fungi. Recently, skin fungal have been increasingly reported and studied, giving rise to crucial breakthroughs in etiology and pathogenesis. This review aims to summarize recent insights into the clinical and etiological characteristics of common skin fungal infections according to different fungal species, as well as remarkable advances in the immune mechanisms. We hope it will be helpful to understand these diverse skin fungal infections, and bring about the latest developments that may facilitate novel diagnostic and therapeutic approaches to improve the outcomes in these patients.
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Affiliation(s)
- Yubo Ma
- Department of Dermatology and Venerology, Peking University First Hospital, China; Research Center for Medical Mycology, Peking University, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, China; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Xiaowen Wang
- Department of Dermatology and Venerology, Peking University First Hospital, China; Research Center for Medical Mycology, Peking University, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, China; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China.
| | - Ruoyu Li
- Department of Dermatology and Venerology, Peking University First Hospital, China; Research Center for Medical Mycology, Peking University, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, China; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China.
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Jia QY, Song YG, Li XQ, Mu ZL, Li RY, Li HM. Simultaneous Infection of the Skin Surface and Dermal Tissue with Two Different Fungus Mimicking Pyoderma Gangrenosum: A Case Report. Clin Cosmet Investig Dermatol 2021; 14:163-167. [PMID: 33623408 PMCID: PMC7895909 DOI: 10.2147/ccid.s286582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 01/26/2021] [Indexed: 11/23/2022]
Abstract
Mucormycosis is an opportunistic fungal infection driven by subphylum Mucormycotina. Cutaneous mucormycosis is the third most common presentation of mucormycosis, and its characterized presentation is an indurated plaque that rapidly evolves to necrosis. Trichophyton rubrum is one of the most common dermatophytes that mainly cause superficial infections and seldom induce deep infections. The present report presents a case of cutaneous fungal infection, in which two kinds of fungus were isolated, and the skin lesion mimicked pyoderma gangrenosum. Trichophyton rubrum was isolated from the crust and hyphae of subphylum Mucormycotina were found in dermal tissue. The irregular systemic and topical use of steroid therapy is the possible cause of the mixed fungal infection in this patient, suggesting the importance of regular steroid therapy.
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Affiliation(s)
- Qiu-Yu Jia
- Department of Dermatology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Ying-Gai Song
- Department of Dermatology, Peking University the First Hospital, Beijing, People's Republic of China
| | - Xiang-Qian Li
- Department of Dermatology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Zhang-Lei Mu
- Department of Dermatology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Ruo-Yu Li
- Department of Dermatology, Peking University the First Hospital, Beijing, People's Republic of China
| | - Hou-Min Li
- Department of Dermatology, Peking University People's Hospital, Beijing, People's Republic of China
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Skiada A, Pavleas I, Drogari-Apiranthitou M. Epidemiology and Diagnosis of Mucormycosis: An Update. J Fungi (Basel) 2020; 6:jof6040265. [PMID: 33147877 PMCID: PMC7711598 DOI: 10.3390/jof6040265] [Citation(s) in RCA: 268] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 10/30/2020] [Accepted: 11/01/2020] [Indexed: 12/17/2022] Open
Abstract
Mucormycosis is an angioinvasive fungal infection, due to fungi of the order Mucorales. Its incidence cannot be measured exactly, since there are few population-based studies, but multiple studies have shown that it is increasing. The prevalence of mucormycosis in India is about 80 times the prevalence in developed countries, being approximately 0.14 cases per 1000 population. Diabetes mellitus is the main underlying disease globally, especially in low and middle-income countries. In developed countries the most common underlying diseases are hematological malignancies and transplantation. Τhe epidemiology of mucormycosis is evolving as new immunomodulating agents are used in the treatment of cancer and autoimmune diseases, and as the modern diagnostic tools lead to the identification of previously uncommon genera/species such as Apophysomyces or Saksenaea complex. In addition, new risk factors are reported from Asia, including post-pulmonary tuberculosis and chronic kidney disease. New emerging species include Rhizopus homothallicus, Thamnostylum lucknowense, Mucor irregularis and Saksenaea erythrospora. Diagnosis of mucormycosis remains challenging. Clinical approach to diagnosis has a low sensitivity and specificity, it helps however in raising suspicion and prompting the initiation of laboratory testing. Histopathology, direct examination and culture remain essential tools, although the molecular methods are improving. The internal transcribed spacer (ITS) region is the most widely sequenced DNA region for fungi and it is recommended as a first-line method for species identification of Mucorales. New molecular platforms are being investigated and new fungal genetic targets are being explored. Molecular-based methods have gained acceptance for confirmation of the infection when applied on tissues. Methods on the detection of Mucorales DNA in blood have shown promising results for earlier and rapid diagnosis and could be used as screening tests in high-risk patients, but have to be validated in clinical studies. More, much needed, rapid methods that do not require invasive procedures, such as serology-based point-of-care, or metabolomics-based breath tests, are being developed and hopefully will be evaluated in the near future.
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Affiliation(s)
- Anna Skiada
- First Department of Medicine, Laiko Hospital, National and Kapodistrian University of Athens, 11527 Athens, Greece
- Correspondence: ; Tel.: +30-2107-462-607
| | | | - Maria Drogari-Apiranthitou
- Fourth Department of Internal Medicine, General University Hospital “Attikon”, National and Kapodistrian University of Athens, 12462 Athens, Greece;
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Disfiguring Mucor irregularis Infection Cured by Amphotericin B and Itraconazole: A Case Report and Treatment Experience. Mycopathologia 2019; 184:677-682. [PMID: 31531755 DOI: 10.1007/s11046-019-00380-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 08/26/2019] [Indexed: 10/26/2022]
Abstract
We report a case of primary cutaneous mucormycosis caused by Mucor irregularis. A 52-year-old male farmer was presented to our hospital with a history of progressive nodule and plaque with ulceration on the face for two and a half years. Broad, aseptate hyphae were seen in direct KOH examination and biopsy. Fungal culture showed light yellow filamentous colonies. The rRNA sequencing revealed M. irregularis was the responsible fungus. Amphotericin B in gradually increasing dose and itraconazole were administered. When the cumulative dose of amphotericin B was 1500 mg, the skin lesion improved significantly with remaining scars on the face. Then, the patient received sequential oral itraconazole treatment for 8 months. There was no recurrence up to now through follow-ups.
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Successful Treatment of Eczema-Like Mucormycosis in a Child by Combination of Intravenous Drip and Percutaneous Injection Amphotericin B. Mycopathologia 2019; 184:309-313. [DOI: 10.1007/s11046-018-0273-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/15/2018] [Indexed: 10/27/2022]
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Wang X, Wang A, Wang X, Li R, Yu J. Cutaneous mucormycosis caused by Mucor irregularis in a patient with CARD9 deficiency. Br J Dermatol 2018; 180:213-214. [PMID: 30187457 DOI: 10.1111/bjd.17144] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- X Wang
- Department of Dermatology and Venerology, Peking University First Hospital, 1 Xi'an men Street, Xicheng District, Beijing, 100034, China
| | - A Wang
- Department of Dermatology and Venerology, Peking University First Hospital, 1 Xi'an men Street, Xicheng District, Beijing, 100034, China
| | - X Wang
- Department of Dermatology and Venerology, Peking University First Hospital, 1 Xi'an men Street, Xicheng District, Beijing, 100034, China
| | - R Li
- Department of Dermatology, Peking University First Hospital, 8 Xishiku Street, Xicheng District, Beijing, 100034, China
| | - J Yu
- Department of Dermatology, Peking University First Hospital, 8 Xishiku Street, Xicheng District, Beijing, 100034, China
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