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Nascimento ALF, de Medeiros AGJ, Neves ACO, de Macedo ABN, Rossato L, Assis Santos D, dos Santos ALS, Lima KMG, Bastos RW. Near-infrared spectroscopy and multivariate analysis as effective, fast, and cost-effective methods to discriminate Candida auris from Candida haemulonii. Front Chem 2024; 12:1412288. [PMID: 39050373 PMCID: PMC11266292 DOI: 10.3389/fchem.2024.1412288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 06/10/2024] [Indexed: 07/27/2024] Open
Abstract
Candida auris and Candida haemulonii are two emerging opportunistic pathogens that have caused an increase in clinical cases in the recent years worldwide. The differentiation of some Candida species is highly laborious, difficult, costly, and time-consuming depending on the similarity between the species. Thus, this study aimed to develop a new, faster, and less expensive methodology for differentiating between C. auris and C. haemulonii based on near-infrared (NIR) spectroscopy and multivariate analysis. C. auris CBS10913 and C. haemulonii CH02 were separated in 15 plates per species, and three isolated colonies of each plate were selected for Fourier transform near-infrared (FT-NIR) analysis, totaling 90 spectra. Subsequently, principal component analysis (PCA) and variable selection algorithms, including the successive projections algorithm (SPA) and genetic algorithm (GA) coupled with linear discriminant analysis (LDA), were employed to discern distinctive patterns among the samples. The use of PCA, SPA, and GA algorithms associated with LDA achieved 100% sensitivity and specificity for the discriminations. The SPA-LDA and GA-LDA algorithms were essential in selecting the variables (infrared wavelengths) of most importance for the models, which could be attributed to binding of cell wall structures such as polysaccharides, peptides, proteins, or molecules resulting from yeasts' metabolism. These results show the high potential of combined FT-NIR and multivariate analysis techniques for the classification of Candida-like fungi, which can contribute to faster and more effective diagnosis and treatment of patients affected by these microorganisms.
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Affiliation(s)
- Ayrton L. F. Nascimento
- Laboratório de Química Biológica e Quimiometria, Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - Anthony G. J. de Medeiros
- Laboratório de Uso Comum, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - Ana C. O. Neves
- Laboratório de Química Biológica e Quimiometria, Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - Ana B. N. de Macedo
- Laboratório de Uso Comum, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - Luana Rossato
- Laboratório de Pesquisa em Ciências da Saúde, Universidade Federal da Grande Dourados, Dourados, Brazil
| | - Daniel Assis Santos
- Laboratório de Micologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- National Institute of Science and Technology in Human Pathogenic Fungi, Ribeirão Preto, Brazil
| | - André L. S. dos Santos
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro-RJ, Brazil
| | - Kássio M. G. Lima
- Laboratório de Química Biológica e Quimiometria, Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - Rafael W. Bastos
- Laboratório de Uso Comum, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, Brazil
- National Institute of Science and Technology in Human Pathogenic Fungi, Ribeirão Preto, Brazil
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Martinez M, Garsin DA, Lorenz MC. Vertebrate and invertebrate animal infection models of Candida auris pathogenicity. Curr Opin Microbiol 2024; 80:102506. [PMID: 38925077 DOI: 10.1016/j.mib.2024.102506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/06/2024] [Accepted: 06/07/2024] [Indexed: 06/28/2024]
Abstract
Candida auris is an emerging fungal pathogen with several concerning qualities. First recognized in 2009, it has arisen in multiple geographically distinct genomic clades nearly simultaneously. C. auris strains are typically multidrug resistant and colonize the skin much better than most other pathogenic fungi; it also persists on abiotic surfaces, enabling outbreaks due to transmission in health care facilities. All these suggest a biology substantially different from the 'model' fungal pathogen, Candida albicans and support intensive investigation of C. auris biology directly. To uncover novel virulence mechanisms in this species requires the development of appropriate animal infection models. Various studies using mice, the definitive model, are inconsistent due to differences in mouse and fungal strains, immunosuppressive regimes, doses, and outcome metrics. At the same time, developing models of skin colonization present a route to new insights into an aspect of fungal pathogenesis that has not been well studied in other species. We also discuss the growing use of nonmammalian model systems, including both vertebrates and invertebrates, such as zebrafish, C. elegans, Drosophila, and Galleria mellonella, that have been productively employed in virulence studies with other fungal species. This review will discuss progress in developing appropriate animal models, outline current challenges, and highlight opportunities in demystifying this curious species.
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Affiliation(s)
- Melissa Martinez
- Department of Microbiology and Molecular Genetics, University of Texas McGovern Medical School and the University of Texas Graduate School of Biomedical Sciences, USA
| | - Danielle A Garsin
- Department of Microbiology and Molecular Genetics, University of Texas McGovern Medical School and the University of Texas Graduate School of Biomedical Sciences, USA
| | - Michael C Lorenz
- Department of Microbiology and Molecular Genetics, University of Texas McGovern Medical School and the University of Texas Graduate School of Biomedical Sciences, USA.
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Almeida NLM, Peralta LCF, Pontes FML, Rinaldo D, Porto VC, Lara VS. Anti-Candida activity and biocompatibility of silver nanoparticles associated with denture glaze: a new approach to the management of denture stomatitis. Folia Microbiol (Praha) 2024:10.1007/s12223-024-01161-4. [PMID: 38652435 DOI: 10.1007/s12223-024-01161-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 03/26/2024] [Indexed: 04/25/2024]
Abstract
The association of silver nanoparticles (AgNps) to sealant agent Palaseal® can be a promising alternative for complete denture wearers who may develop denture stomatitis (DS). The study aimed to evaluate the anti-Candida and biocompatible potential of silver nanoparticles synthesized by three routes associated with denture glaze to prevent and/or treat oral candidiasis. Surface acrylic resin specimens were treated with different associations of glaze with AgNps (VER+AgUV, VER+AgTurk and VER+AgGm). As controls, specimens were treated with glaze+nystatin (VER+Nyst), glaze only (VER) or submerged in PBS (PBS). Afterwards, Candida albicans biofilm was developed for 24 h, 15 d and 30 d. Subsequently, the biofilm was quantified by CFU/mL, XTT assay and confocal laser scanning microscopy. Fibroblasts were submitted to conditioned medium with the same associations for 24, 48 and 72 h and LIVE/DEAD® viability test was carried out. Regardless of the period, there was a significant reduction (p < 0.01) of viable fungal cells load, as well as inhibition of fungal metabolic activity, in specimens treated with glaze+AgNps associations, compared to VER and PBS. The anti-Candida effects of the associations were similar to the VER+Nyst group, with emphasis on VER+AgGm, which showed the highest percentage values of non-viable fungal cells maintained over time. The associations did not prove toxicity to fibroblasts. The AgNps exerted antimicrobial activity against C. albicans biofilms and are biocompatible. The most effective results were achieved with the association of glaze+silver nanoparticles synthesized by the green chemistry method (AgGm), proving to be an innovative alternative in the management of DS.
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Affiliation(s)
- Nara Lígia Martins Almeida
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, 17012-901, Brazil
| | - Laura Catalí Ferreira Peralta
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru 17012-901, Brazil
| | | | - Daniel Rinaldo
- Department of Chemistry, São Paulo State University (UNESP), Bauru 17033-360, Brazil
| | - Vinicius Carvalho Porto
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru 17012-901, Brazil
| | - Vanessa Soares Lara
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, 17012-901, Brazil.
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Wang Q, Cheng S, Wang Y, Li F, Chen J, Du W, Kang H, Wang Z. Global characteristics and trends in research on Candida auris. Front Microbiol 2023; 14:1287003. [PMID: 38125576 PMCID: PMC10731253 DOI: 10.3389/fmicb.2023.1287003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 11/13/2023] [Indexed: 12/23/2023] Open
Abstract
Introduction Candida auris, a fungal pathogen first reported in 2009, has shown strong resistance to azole antifungal drugs and has caused severe nosocomial outbreaks. It can also form biofilms, which can colonize patients' skin and transmit to others. Despite numerous reports of C. auris isolation in various countries, many studies have reported contradictory results. Method A bibliometric analysis was conducted using VOSviewer to summarize research trends and provide guidance for future research on controlling C. auris infection. The analysis revealed that the United States and the US CDC were the most influential countries and research institutions, respectively. For the researchers, Jacques F. Meis published the highest amount of related articles, and Anastasia P. Litvintseva's articles with the highest average citation rate. The most cited publications focused on clade classification, accurate identification technologies, nosocomial outbreaks, drug resistance, and biofilm formation. Keyword co-occurrence analysis revealed that the top five highest frequencies were for 'drug resistance,' 'antifungal susceptibility test,' 'infection,' 'Candida auris,' and 'identification.' The high-frequency keywords clustered into four groups: rapid and precise identification, drug resistance research, pathogenicity, and nosocomial transmission epidemiology studies. These clusters represent different study fields and current research hotspots of C. auris. Conclusion The bibliometric analysis identified the most influential country, research institution, and researcher, indicating current research trends and hotspots for controlling C. auris.
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Affiliation(s)
- Qihui Wang
- Laboratory of Microbiology, Department of Clinical Laboratory, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Shitong Cheng
- Laboratory of Microbiology, Department of Clinical Laboratory, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yinling Wang
- Laboratory of Microbiology, Department of Clinical Laboratory, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Fushun Li
- Laboratory of Microbiology, Department of Clinical Laboratory, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Jingjing Chen
- Laboratory of Microbiology, Department of Clinical Laboratory, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Wei Du
- National Clinical Research Center for Laboratory Medicine, Department of Clinical Laboratory, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Hui Kang
- Laboratory of Microbiology, Department of Clinical Laboratory, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Zhongqing Wang
- Department of Information Centre, The First Hospital of China Medical University, Shenyang, Liaoning, China
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Oyardi O, Demir ES, Alkan B, Komec S, Genc GE, Aygun G, Teke L, Turan D, Erturan Z, Savage PB, Guzel CB. Phenotypic Investigation of Virulence Factors, Susceptibility to Ceragenins, and the Impact of Biofilm Formation on Drug Efficacy in Candida auris Isolates from Türkiye. J Fungi (Basel) 2023; 9:1026. [PMID: 37888282 PMCID: PMC10607835 DOI: 10.3390/jof9101026] [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: 09/14/2023] [Revised: 10/09/2023] [Accepted: 10/17/2023] [Indexed: 10/28/2023] Open
Abstract
Candida auris has emerged as a significant fungal threat due to its rapid worldwide spread since its first appearance, along with its potential for antimicrobial resistance and virulence properties. This study was designed to examine virulence characteristics, the efficacy of ceragenins, and biofilm-derived drug resistance in seven C. auris strains isolated from Turkish intensive care patients. It was observed that none of the tested strains exhibited proteinase or hemolysis activity; however, they demonstrated weak phospholipase and esterase activity. In addition, all strains were identified as having moderate to strong biofilm formation characteristics. Upon determining the minimum inhibitory concentrations (MIC) of ceragenins, it was discovered that CSA-138 exhibited the highest effectiveness with a MIC range of 1-0.5 µg/mL, followed by CSA-131 with a MIC of 1 µg/mL. Also, antimicrobial agents destroyed mature biofilms at high concentrations (40-1280 µg/mL). The investigation revealed that the strains isolated from Türkiye displayed weak exoenzyme activities. Notably, the ceragenins exhibited effectiveness against these strains, suggesting their potential as a viable treatment option.
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Affiliation(s)
- Ozlem Oyardi
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Gazi University, Ankara 06330, Türkiye
| | - Elif Sena Demir
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Istanbul University, Istanbul 34116, Türkiye; (E.S.D.); (B.A.); (C.B.G.)
| | - Busra Alkan
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Istanbul University, Istanbul 34116, Türkiye; (E.S.D.); (B.A.); (C.B.G.)
| | - Selda Komec
- Laboratory of Medical Microbiology, Basaksehir Cam and Sakura City Hospital, Istanbul 34480, Türkiye;
| | - Gonca Erkose Genc
- Department of Medical Microbiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul 34093, Türkiye; (G.E.G.); (Z.E.)
| | - Gokhan Aygun
- Department of Medical Microbiology, Cerrahpasa School of Medicine, Istanbul University-Cerrahpasa, Istanbul 34098, Türkiye;
| | - Leyla Teke
- Clinic of Microbiology, Gaziosmanpasa Training and Research Hospital, University of Health Sciences, Istanbul 34255, Türkiye;
| | - Deniz Turan
- Medical Microbiology Laboratory, Haydarpasa Numune Training and Research Hospital, University of Health Sciences, Istanbul 34668, Türkiye;
| | - Zayre Erturan
- Department of Medical Microbiology, Istanbul Faculty of Medicine, Istanbul University, Istanbul 34093, Türkiye; (G.E.G.); (Z.E.)
| | - Paul B. Savage
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA;
| | - Cagla Bozkurt Guzel
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Istanbul University, Istanbul 34116, Türkiye; (E.S.D.); (B.A.); (C.B.G.)
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Ramos LS, Parra-Giraldo CM, Branquinha MH, Santos ALS. Cell Aggregation Capability of Clinical Isolates from Candida auris and Candida haemulonii Species Complex. Trop Med Infect Dis 2023; 8:382. [PMID: 37624320 PMCID: PMC10460019 DOI: 10.3390/tropicalmed8080382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/21/2023] [Accepted: 07/25/2023] [Indexed: 08/26/2023] Open
Abstract
The opportunistic fungal pathogens belonging to the Candida haemulonii complex and the phylogenetically related species Candida auris are well-known for causing infections that are difficult to treat due to their multidrug-resistance profiles. Candida auris is even more worrisome due to its ability to cause outbreaks in healthcare settings. These emerging yeasts produce a wide range of virulence factors that facilitate the development of the infectious process. In recent years, the aggregative phenotype has been receiving attention, as it is mainly associated with defects in cellular division and its possible involvement in helping the fungus to escape from the host immune responses. In the present study, we initially investigated the aggregation ability of 18 clinical isolates belonging to the C. haemulonii species complex (C. haemulonii sensu stricto, C. duobushaemulonii, and C. haemulonii var. vulnera) and C. auris. Subsequently, we evaluated the effects of physicochemical factors on fungal aggregation competence. The results demonstrated that cell-to-cell aggregation was a typically time-dependent event, in which almost all studied fungal isolates of both the C. haemulonii species complex and C. auris exhibited high aggregation after 2 h of incubation at 37 °C. Interestingly, the fungal cells forming the aggregates remained viable. The aggregation of all isolates was not impacted by pH, temperature, β-mercaptoethanol (a protein-denaturing agent), or EDTA (a chelator agent). Conversely, proteinase K, trypsin, and sodium dodecyl sulfate (SDS) significantly diminished the fungal aggregation. Collectively, our results demonstrated that the aggregation ability of these opportunistic yeast pathogens is time-dependent, and surface proteins and hydrophobic interactions seem to mediate cell aggregation since the presence of proteases and anionic detergents affected the aggregation capability. However, further studies are necessary to better elucidate the molecular aspects of this intriguing phenomenon.
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Affiliation(s)
- Lívia S. Ramos
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-902, Brazil; (L.S.R.); (M.H.B.)
| | - Claudia M. Parra-Giraldo
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia;
| | - Marta H. Branquinha
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-902, Brazil; (L.S.R.); (M.H.B.)
- Rede Micologia RJ—Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Rio de Janeiro 21941-902, Brazil
| | - André L. S. Santos
- Laboratório de Estudos Avançados de Microrganismos Emergentes e Resistentes (LEAMER), Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-902, Brazil; (L.S.R.); (M.H.B.)
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia;
- Programa de Pós-Graduação em Bioquímica, Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21941-909, Brazil
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Fayed B, Lazreg IK, AlHumaidi RB, Qasem MAAA, Alajmy BMGN, Bojbarah FMAM, Senok A, Husseiny MI, Soliman SSM. Intra-clade Heterogeneity in Candida auris: Risk of Management. Curr Microbiol 2023; 80:295. [PMID: 37486431 DOI: 10.1007/s00284-023-03416-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 07/12/2023] [Indexed: 07/25/2023]
Abstract
Candida auris has emerged as a significant nosocomial fungal pathogen with a high risk of pathogenicity. Since the initial detection of C. auris in 2009, it gained lots of attention with a recent alert by the Centers for Disease Control and Prevention (CDC) due to its high infectivity and drug resistance. Several studies showed the capability of C. auris to secrete lytic enzymes, germinate, and form a biofilm that eventually results in interactions with the host cells, leading to serious infections. Other studies demonstrated a decrease in susceptibility of C. auris strains to available antifungals, which may be caused by mutations within the target genes, or the drug efflux pumps. However, the contribution of C. auris heterogeneity in pathogenicity and drug resistance is not well studied. Here, we shed light on the factors contributing to the development of heterogeneity in C. auris. These include phenotypic changes, biofilm formation, mechanisms of drug resistance, host invasion, mode of transmission, and expression of virulence factors. C. auris exhibits different phenotypes, particularly aggregative, and non-aggregative forms that play an important role in fungal heterogeneity, which significantly affects drug resistance and pathogenicity. Collectively, heterogeneity in C. auris significantly contributes to ineffective treatment, which in turn affects the fungal pathogenicity and drug resistance. Therefore, understanding the underlying reasons for C. auris heterogeneity and applying effective antifungal stewardship could play a major role in controlling this pathogen.
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Affiliation(s)
- Bahgat Fayed
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, UAE
- Chemistry of Natural and Microbial Products, National Research Centre, Cairo, Egypt
| | - Imene K Lazreg
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Razan B AlHumaidi
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, UAE
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Maryam A A A Qasem
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Bashayir M Gh N Alajmy
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Fatemh M A M Bojbarah
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, UAE
| | - Abiola Senok
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Building 14 Dubai Healthcare City, P.O.Box 505055, Dubai, UAE
| | - Mohamed I Husseiny
- Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
- Department of Translational Research & Cellular Therapeutics, Arthur Riggs Diabetes & Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Sameh S M Soliman
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, UAE.
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, UAE.
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Ortiz-Roa C, Valderrama-Rios MC, Sierra-Umaña SF, Rodríguez JY, Muñetón-López GA, Solórzano-Ramos CA, Escandón P, Alvarez-Moreno CA, Cortés JA. Mortality Caused by Candida auris Bloodstream Infections in Comparison with Other Candida Species, a Multicentre Retrospective Cohort. J Fungi (Basel) 2023; 9:715. [PMID: 37504704 PMCID: PMC10381160 DOI: 10.3390/jof9070715] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/19/2023] [Accepted: 06/26/2023] [Indexed: 07/29/2023] Open
Abstract
Candida auris is an emerging pathogen considered to be critical in the World Health Organization fungal organisms list. The study aims to determine the mortality and hospital stays attributed to Candida auris (C. auris) compared to other Candida species in adult patients with candidemia. A retrospective cohort of adults with candidemia was examined from seven centres in Colombia between 2016 and 2021. The primary outcome was 30-day mortality, and the secondary outcome was the length of hospital stay among survivors. Adjustment of the confounding variables was performed using inverse probability weights of exposure propensity score (candidemia by C. auris), survival regression models (Weibull distribution), and a counting model (negative binomial distribution). A value of 244 (47.6%) of the 512 patients with candidemia died within the first 30 days. The crude mortality in C. auris was 38.1% vs. 51.1% in Candida non-auris (CNA). In the Weibull model, mortality in the C. auris group was lower (adjusted HR: aHR- 0.69, 95% CI: 0.53-0.90). Antifungal treatment also decreased mortality, with an aHR of 0.36 (95% CI 0.27-0.47), while the presence of septic shock on patient progression increased it, with an aHR of 1.73 (95% CI 1.41-2.13). Among the patients who survived, no differences in the length of hospital stay were observed between the C. auris and the CNA groups, with an incidence rate ratio of 0.92 (95% CI: 0.68-1.22). Mortality in patients with C. auris bloodstream infections appears lower when adjusted for numerous confounding variables regarding treatment and the presence of septic shock in patient progression. We identified no significant effect of C. auris on the length of hospital stay in surviving patients.
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Affiliation(s)
- Cynthia Ortiz-Roa
- Department of Internal Medicine, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá 111321, Colombia
| | | | | | - José Yesid Rodríguez
- Clínica Integral de Emergencias Laura Daniela, Instituto Cardiovascular del Cesar, Centro de Investigaciones Microbiológicas del Cesar (CIMCE), Valledupar 200001, Colombia
| | | | | | - Patricia Escandón
- Grupo de Microbiología, Instituto Nacional de Salud, Bogotá 111321, Colombia
| | | | - Jorge Alberto Cortés
- Department of Internal Medicine, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá 111321, Colombia
- Infectious Diseases Unit, Hospital Universitario Nacional, Bgootá 111321, Colombia
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Peralta LCF, Almeida NLM, Pontes FML, Rinaldo D, Carneiro CA, Neppelenbroek KH, Lara VS, Porto VC. Silver nanoparticles in denture adhesive: An antimicrobial approach against Candida albicans. J Dent 2023; 131:104445. [PMID: 36773742 DOI: 10.1016/j.jdent.2023.104445] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 01/21/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
OBJECTIVE To evaluate the antimicrobial potential of silver nanoparticles (Ag NPs) synthesized using three different routes (ultraviolet light, Turkevich, and green chemistry method using Glycine max extract) associated with COREGA® denture powder adhesive. METHODS Heat-cured acrylic resin specimens were treated with different Ag NPs associated with the adhesive (AD + Ag UV, AD + Ag Turk, and AD + Ag Gm groups). As controls, the specimens were treated with a combination of adhesive and nystatin (AD + Nyst group), only adhesive (AD group), or submerged on the surface of the specimens (PBS group). After the treatments, biofilms of C. albicans developed for 3, 6, and 12 h on the specimen surfaces. The biofilm was quantified using colony-forming units per milliliter, colorimetric assay, and confocal laser scanning microscopy. RESULTS Regardless of the period, we observed an inhibition of fungal load and a reduction in metabolic activity and biofilm mass in the resin specimens treated with the combinations AD/Ag NPs, compared to AD and PBS. The antimicrobial action of the AD + Turk and AD + Ag Gm groups was similar than that for the AD + Nyst group in all periods and viability tests, except for the biofilm mass (12 h). CONCLUSIONS The COREGA® adhesive with Ag NPs, mainly those synthesized using the Turkevich and Glycine max methods, showed excellent antimicrobial activity against C. albicans biofilms, maintained for up to 12 h. CLINICAL SIGNIFICANCE The association of Ag NPs to the adhesive can add preventive or therapeutic effects against denture stomatitis, to this prosthetic material.
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Affiliation(s)
- Laura Catalí Ferreira Peralta
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil, 17012-901
| | - Nara Ligia Martins Almeida
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil, 17012-901
| | | | - Daniel Rinaldo
- Department of Chemistry, São Paulo State University (UNESP), Bauru, Brazil
| | - Camila Alves Carneiro
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil, 17012-901
| | - Karin Hermana Neppelenbroek
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil, 17012-901
| | - Vanessa Soares Lara
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil, 17012-901
| | - Vinicius Carvalho Porto
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil, 17012-901.
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10
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Garcia-Bustos V, Pemán J, Ruiz-Gaitán A, Cabañero-Navalon MD, Cabanilles-Boronat A, Fernández-Calduch M, Marcilla-Barreda L, Sigona-Giangreco IA, Salavert M, Tormo-Mas MÁ, Ruiz-Saurí A. Host-pathogen interactions upon Candida auris infection: fungal behaviour and immune response in Galleria mellonella. Emerg Microbes Infect 2022; 11:136-146. [PMID: 34890523 PMCID: PMC8725852 DOI: 10.1080/22221751.2021.2017756] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/08/2021] [Indexed: 02/07/2023]
Abstract
Candida auris has globally emerged as a multidrug-resistant fungus linked to healthcare-associated outbreaks. There is still limited evidence on its virulence, pathogenicity determinants, and complex host-pathogen interactions. This study analyzes the in vivo fungal behaviour, immune response, and host-pathogen interactions upon C. auris infection compared to C. albicans and C. parapsilosis in G. mellonella. This was performed by immunolabelling fungal structures and larval plasmatocytes and using a quantitative approach incorporating bioinformatic morphometric techniques into the study of microbial pathogenesis. C. auris presents a remarkably higher immunogenic activity than expected at its moderate degree of tissue invasion. It induces a greater inflammatory response than C. albicans and C. parapsilosis at the expense of plasmatocyte nodule formation, especially in non-aggregative strains. It specifically invades the larval respiratory system, in a pattern not previously observed in other Candida species, and presents inter-phenotypic tissue tropism differences. C. auris filaments in vivo less frequently than C. albicans or C. parapsilosis mostly through pseudohyphal growth. Filamentation might not be a major pathogenic determinant in C. auris, as less virulent aggregative phenotypes form pseudohyphae to a greater extent. C. auris has important both interspecific and intraspecific virulence and phenotype heterogeneity, with aggregative phenotypes of C. auris sharing characteristics with low pathogenic species such as C. parapsilosis. Our work suggests that C. auris owns an important morphogenetic plasticity that distinguishes it from other yeasts of the genus. Routine phenotypic identification of aggregative or non-aggregative phenotypes should be performed in the clinical setting as it may impact patient management.
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Affiliation(s)
- Victor Garcia-Bustos
- Department of Internal Medicine and Infectious Diseases, University and Polytechnic La Fe Hospital, Valencia, Spain
- Severe Infection Research Group, Health Research Institute La Fe, Valencia, Spain
- Department of Pathology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | - Javier Pemán
- Severe Infection Research Group, Health Research Institute La Fe, Valencia, Spain
- Department of Medical Microbiology, University and Polytechnic La Fe Hospital, Valencia, Spain
| | - Alba Ruiz-Gaitán
- Severe Infection Research Group, Health Research Institute La Fe, Valencia, Spain
| | - Marta Dafne Cabañero-Navalon
- Department of Internal Medicine and Infectious Diseases, University and Polytechnic La Fe Hospital, Valencia, Spain
| | - Ana Cabanilles-Boronat
- Department of Pathology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | - María Fernández-Calduch
- Department of Pathology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | - Lucía Marcilla-Barreda
- Department of Pathology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | - Ignacio A. Sigona-Giangreco
- Severe Infection Research Group, Health Research Institute La Fe, Valencia, Spain
- Department of Medical Microbiology, University and Polytechnic La Fe Hospital, Valencia, Spain
| | - Miguel Salavert
- Department of Internal Medicine and Infectious Diseases, University and Polytechnic La Fe Hospital, Valencia, Spain
- Severe Infection Research Group, Health Research Institute La Fe, Valencia, Spain
| | | | - Amparo Ruiz-Saurí
- Department of Pathology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
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11
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Similarities and Differences among Species Closely Related to Candida albicans: C. tropicalis, C. dubliniensis, and C. auris. Cell Microbiol 2022. [DOI: 10.1155/2022/2599136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Although Candida species are widespread commensals of the microflora of healthy individuals, they are also among the most important human fungal pathogens that under certain conditions can cause diseases (candidiases) of varying severity ranging from mild superficial infections of the mucous membranes to life-threatening systemic infections. So far, the vast majority of research aimed at understanding the molecular basis of pathogenesis has been focused on the most common species—Candida albicans. Meanwhile, other closely related species belonging to the CTG clade, namely, Candida tropicalis and Candida dubliniensis, are becoming more important in clinical practice, as well as a relatively newly identified species, Candida auris. Despite the close relationship of these microorganisms, it seems that in the course of evolution, they have developed distinct biochemical, metabolic, and physiological adaptations, which they use to fit to commensal niches and achieve full virulence. Therefore, in this review, we describe the current knowledge on C. tropicalis, C. dubliniensis, and C. auris virulence factors, the formation of a mixed species biofilm and mutual communication, the environmental stress response and related changes in fungal cell metabolism, and the effect of pathogens on host defense response and susceptibility to antifungal agents used, highlighting differences with respect to C. albicans. Special attention is paid to common diagnostic problems resulting from similarities between these species and the emergence of drug resistance mechanisms. Understanding the different strategies to achieve virulence, used by important opportunistic pathogens of the genus Candida, is essential for proper diagnosis and treatment.
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12
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Antifungal potential of isoespintanol extracted from Oxandra xylopioides diels (Annonaceae) against intrahospital isolations of Candida SPP. Heliyon 2022; 8:e11110. [PMID: 36303897 PMCID: PMC9593293 DOI: 10.1016/j.heliyon.2022.e11110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 04/24/2022] [Accepted: 10/11/2022] [Indexed: 11/06/2022] Open
Abstract
The aim of this study was to evaluate the antifungal activity of isoespintanol (ISO) extracted from Oxandra xylopioides Diels (Annonaceae) against clinical isolates of Candida spp. Isoespintanol was obtained from the petroleum benzine extract of the leaves and was identified by nuclear magnetic resonance (NMR) and mass spectrometry (MS). For antifungal activity experiments, the broth microdilution method was used. The results show an inhibitory effect against Candida spp., with minimum inhibitory concentration (MIC) values between 450.4-503.3 μg/mL. Furthermore, the inhibitory effect of ISO against fungal biofilms is highlighted, even in some cases, greater than the effect shown by amphotericin B (AFB) and in others, where AFB showed no effect. Assays with fluorescent staining with acridine orange (AO) and ethidium bromide (EB), transmission electron microscopy (TEM), Evans blue, measurement of extracellular pH and leakage of intracellular material, evidenced damage at the level of fungal membranes and general cell damage, when cells were exposed to ISO, compared to untreated cells. The results of this research, serve as the basis for future studies in the establishment of the mechanisms of antifungal action of ISO, which could serve as an adjunct in the treatment of infections by these yeasts.
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13
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Desoubeaux G, Coste AT, Imbert C, Hennequin C. Overview about Candida auris: What's up 12 years after its first description? J Mycol Med 2022; 32:101248. [DOI: 10.1016/j.mycmed.2022.101248] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 01/04/2022] [Accepted: 01/19/2022] [Indexed: 12/18/2022]
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14
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Current scenario of the search for new antifungal agents to treat Candida auris infections: An integrative review. J Mycol Med 2021; 32:101232. [PMID: 34883404 DOI: 10.1016/j.mycmed.2021.101232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 11/18/2021] [Accepted: 11/29/2021] [Indexed: 12/22/2022]
Abstract
Candida auris emerges as an important causative agent of fungal infections, with worrisome mortality rates, mainly in immunocompromised individuals. This scenario is worsened by the limited availability of antifungal drugs and the increasing development of resistance to them. Due to the relevance of C. auris infections to public health, several studies aimed to discover new antifungal compounds capable of overcoming this fungus. Nonetheless, these information are decentralized, precluding the understandment of the current status of the search for new anti-C. auris compounds. Thus, this integrative review aimed to summarize information regarding anti-C. auris compounds reported in literature. After using predefined selection criteria, 71 articles were included in this review, and data from a total of 101 substances were extracted. Most of the studies tested synthetic substances, including several azoles. Moreover, drug repurposing emerges as a suitable strategy to discover new anti-C. auris agents. Few studies, however, assessed the mechanism of action and the in vivo antifungal activity of the compounds. Therefore, more studies must be performed to evaluate the usefulness of these substances as anti-C. auris therapies.
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15
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Garcia-Bustos V, Cabanero-Navalon MD, Ruiz-Saurí A, Ruiz-Gaitán AC, Salavert M, Tormo MÁ, Pemán J. What Do We Know about Candida auris? State of the Art, Knowledge Gaps, and Future Directions. Microorganisms 2021; 9:2177. [PMID: 34683498 PMCID: PMC8538163 DOI: 10.3390/microorganisms9102177] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/06/2021] [Accepted: 10/13/2021] [Indexed: 12/20/2022] Open
Abstract
Candida auris has unprecedently emerged as a multidrug resistant fungal pathogen, considered a serious global threat due to its potential to cause nosocomial outbreaks and deep-seated infections with staggering transmissibility and mortality, that has put health authorities and institutions worldwide in check for more than a decade now. Due to its unique features not observed in other yeasts, it has been categorised as an urgent threat by the Centers for Disease Control and Prevention and other international agencies. Moreover, epidemiological alerts have been released in view of the increase of healthcare-associated C. auris outbreaks in the context of the COVID-19 pandemic. This review summarises the current evidence on C. auris since its first description, from virulence to treatment and outbreak control, and highlights the knowledge gaps and future directions for research efforts.
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Affiliation(s)
- Victor Garcia-Bustos
- Department of Internal Medicine and Infectious Diseases, University and Polytechnic La Fe Hospital, 56026 Valencia, Spain;
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (A.C.R.-G.); (M.Á.T.); (J.P.)
- Department of Pathology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain;
| | - Marta D. Cabanero-Navalon
- Department of Internal Medicine and Infectious Diseases, University and Polytechnic La Fe Hospital, 56026 Valencia, Spain;
| | - Amparo Ruiz-Saurí
- Department of Pathology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain;
| | - Alba C. Ruiz-Gaitán
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (A.C.R.-G.); (M.Á.T.); (J.P.)
| | - Miguel Salavert
- Department of Internal Medicine and Infectious Diseases, University and Polytechnic La Fe Hospital, 56026 Valencia, Spain;
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (A.C.R.-G.); (M.Á.T.); (J.P.)
| | - María Á. Tormo
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (A.C.R.-G.); (M.Á.T.); (J.P.)
| | - Javier Pemán
- Severe Infection Research Group, Health Research Institute La Fe, 46026 Valencia, Spain; (A.C.R.-G.); (M.Á.T.); (J.P.)
- Department of Medical Microbiology, University and Polytechnic La Fe Hospital, 46026 Valencia, Spain
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16
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Lim SJ, Ali MSM, Sabri S, Noor NDM, Salleh AB, Oslan SN. Opportunistic yeast pathogen Candida spp.: Secreted and membrane-bound virulence factors. Med Mycol 2021; 59:1127-1144. [PMID: 34506621 DOI: 10.1093/mmy/myab053] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/10/2021] [Accepted: 08/26/2021] [Indexed: 12/24/2022] Open
Abstract
Candidiasis is a fungal infection caused by Candida spp. especially Candida albicans, C. glabrata, C. parapsilosis and C. tropicalis. Although the medicinal therapeutic strategies have rapidly improved, the mortality rate due to candidiasis has continuously increased. The secreted and membrane-bound virulence factors (VFs) are responsible for fungal invasion, damage and translocation through the host enterocytes besides the evasion from host immune system. VFs such as agglutinin-like sequences (Als), heat shock protein 70, phospholipases, secreted aspartyl proteinases (Sap), lipases, enolases and phytases are mostly hydrolases which degrade the enterocyte membrane components except for candidalysin, the VF acts as a peptide toxin to induce necrotic cell lysis. To date, structural studies of the VFs remain underexplored, hindering their functional analyses. Among the VFs, only secreted aspartyl proteinases and agglutinin-like sequences have their structures deposited in Protein Data Bank (PDB). Therefore, this review scrutinizes the mechanisms of these VFs by discussing the VF-deficient studies of several Candida spp. and their abilities to produce these VFs. Nonetheless, their latest reported sequential and structural analyses are discussed to impart a wider perception of the host-pathogen interactions and potential vaccine or antifungal drug targets. This review signifies that more VFs structural investigations and mining in the emerging Candida spp. are required to decipher their pathogenicity and virulence mechanisms compared to the prominent C. albicans. LAY ABSTRACT Candida virulence factors (VFs) including mainly enzymes and proteins play vital roles in breaching the human intestinal barrier and causing deadly candidiasis. Limited VFs' structural studies hinder deeper comprehension of their mechanisms and thus the design of vaccines and antifungal drugs against fungal infections.
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Affiliation(s)
- Si Jie Lim
- Enzyme Technology and X-ray Crystallography Laboratory, VacBio 5, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Enzyme and Microbial Technology (EMTech) Research Centre, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Mohd Shukuri Mohamad Ali
- Enzyme Technology and X-ray Crystallography Laboratory, VacBio 5, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Enzyme and Microbial Technology (EMTech) Research Centre, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Suriana Sabri
- Enzyme and Microbial Technology (EMTech) Research Centre, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Noor Dina Muhd Noor
- Enzyme and Microbial Technology (EMTech) Research Centre, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Abu Bakar Salleh
- Enzyme and Microbial Technology (EMTech) Research Centre, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Siti Nurbaya Oslan
- Enzyme Technology and X-ray Crystallography Laboratory, VacBio 5, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Enzyme and Microbial Technology (EMTech) Research Centre, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
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