1
|
|
2
|
Meena S, Mohanty A, Kaistha N, Sasirekha U, Meena J. Comparative Assessment of Matrix-assisted Laser Desorption Ionization-time of Flight Mass Spectrometry (MALDI-TOF-MS) and Conventional Methods in the Identification of Clinically Relevant Yeasts. Cureus 2021; 13:e15607. [PMID: 34277227 PMCID: PMC8273367 DOI: 10.7759/cureus.15607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2021] [Indexed: 11/20/2022] Open
Abstract
Background: Candida species are generally identified by conventional methods such as germ tube or morphological appearance on cornmeal agar (CMA), biochemical methods using API kits, and molecular biological techniques. Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF-MS) has revolutionized the identification of fungi reducing the turnaround time of days to minutes. Purpose: To compare the performance of MALDI-TOF MS and conventional methods in the identification of clinically relevant yeasts. Materials and methods: In this study, Candida identifications on CMA are compared with the results obtained on MALDI-TOF MS (Bruker Daltonics, Bremen, Germany). Discrepant results were confirmed by sequencing internal transcribed spacer (ITS) regions of rDNA. Results: A total of 114 clinical Candida species isolated from blood cultures were isolated and identified with conventional methods as well as with the MALDI-TOF-MS system. The agreement between the two test results were analyzed using Inter-rater reliability analysis (Cohen's Kappa) in SPSS Software Version 24 (IBM Corp., Armonk, NY). Overall, there was substantial agreement (Cohen's kappa=0.763) between the two methods. A value between 0.61 and 0.80 is classified under substantial. The most frequently isolated bloodstream Candida species included Candida albicans, C. tropicalis, C. parapsilosis, C.lusitaniae, C. glabrata which were accurately identified by MALDI-TOF-MS. When compared with conventional identification methods, MALDI-TOF-MS results are more reliable and rapid for Candida identification.
Collapse
Affiliation(s)
- Suneeta Meena
- Lab Medicine, All India Institute of Medical Sciences New Delhi, New Delhi, IND
| | - Aroop Mohanty
- Microbiology, All India Institute of Medical Sciences Gorakhpur, Gorakhpur, IND
| | - Neelam Kaistha
- Microbiology, All India Institute of Medical Sciences Rishikesh, Rishikesh, IND
| | - U Sasirekha
- Microbiology, All India Institute of Medical Sciences Rishikesh, Rishikesh, IND
| | - Jitendra Meena
- Preventive Oncology, National Cancer Institute, All India Institute of Medical Sciences Jhajjar, Haryana, IND
| |
Collapse
|
3
|
Muhvić-Urek M, Saltović E, Braut A, Kovačević Pavičić D. Association between Vitamin D and Candida-Associated Denture Stomatitis. Dent J (Basel) 2020; 8:dj8040121. [PMID: 33096916 PMCID: PMC7712357 DOI: 10.3390/dj8040121] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/25/2020] [Accepted: 10/14/2020] [Indexed: 12/19/2022] Open
Abstract
Candida-associated denture stomatitis (CADS) is a fungal infection affecting 60–65% of denture wearers. Its etiology is complex and multifactorial and often associated with host immunodeficiency. Evidence exists that vitamin D has potential immunomodulatory and anti-inflammatory effects. The aim of this case–control study was to assess the association between vitamin D levels and CADS. The study included 32 complete denture wearers with CADS and 32 sex- and age-matched complete denture wearers without CADS. The patients were clinically examined, and the severity of denture stomatitis was assessed according to Newton’s classification scale. The serum vitamin D level was determined via the use of an electrochemiluminescence assay. The vitamin D level in the CADS group and control group was 54.68 ± 17.07 and 56.82 ± 17.75 nmol/L, respectively. There was no significant difference between the groups (p = 0.622). Univariate logistic regression analysis showed that the presence of CADS was not associated with hypovitaminosis D (odds ratio (OR) = 1.44; 95% confidence interval (CI) = 0.37–5.54). It can be concluded that vitamin D is not associated with CADS and does not play a significant role in host susceptibility to CADS. This finding suggests that vitamin D screening is not indicated routinely in patients with Candida-associated denture stomatitis.
Collapse
Affiliation(s)
- Miranda Muhvić-Urek
- Department of Oral Medicine and Periodontology, Faculty of Dental Medicine, University of Rijeka, Kresimirova 40, 51 000 Rijeka, Croatia
- Dental Clinic, Clinical Hospital Center Rijeka, Kresimirova 40, 51 000 Rijeka, Croatia
| | - Ema Saltović
- Dental Clinic, Clinical Hospital Center Rijeka, Kresimirova 40, 51 000 Rijeka, Croatia
| | - Alen Braut
- Dental Clinic, Clinical Hospital Center Rijeka, Kresimirova 40, 51 000 Rijeka, Croatia
- Department of Restorative Dentistry and Endodontics, Faculty of Dental Medicine, University of Rijeka, Kresimirova 40, 51 000 Rijeka, Croatia
| | - Daniela Kovačević Pavičić
- Dental Clinic, Clinical Hospital Center Rijeka, Kresimirova 40, 51 000 Rijeka, Croatia
- Department of Prosthodontics, Faculty of Dental Medicine, University of Rijeka, Kresimirova 40, 51 000 Rijeka, Croatia
| |
Collapse
|
4
|
Kord M, Salehi M, Khodavaisy S, Hashemi SJ, Daie Ghazvini R, Rezaei S, Maleki A, Elmimoghaddam A, Alijani N, Abdollahi A, Doomanlou M, Ahmadikia K, Rashidi N, Pan W, Boekhout T, Arastehfar A. Epidemiology of yeast species causing bloodstream infection in Tehran, Iran (2015-2017); superiority of 21-plex PCR over the Vitek 2 system for yeast identification. J Med Microbiol 2020; 69:712-720. [PMID: 32368996 PMCID: PMC7451039 DOI: 10.1099/jmm.0.001189] [Citation(s) in RCA: 18] [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: 01/21/2020] [Accepted: 03/24/2020] [Indexed: 12/17/2022] Open
Abstract
Introduction. Given the limited number of candidaemia studies in Iran, the profile of yeast species causing bloodstream infections (BSIs), especially in adults, remains limited. Although biochemical assays are widely used in developing countries, they produce erroneous results, especially for rare yeast species.Aim. We aimed to assess the profile of yeast species causing BSIs and to compare the accuracy of the Vitek 2 system and 21-plex PCR.Methodology. Yeast blood isolates were retrospectively collected from patients recruited from two tertiary care training hospitals in Tehran from 2015 to 2017. Relevant clinical data were mined. Identification was performed by automated Vitek 2, 21-plex PCR and sequencing of the internal transcribed spacer region (ITS1-5.8S-ITS2).Results. In total, 137 yeast isolates were recovered from 107 patients. The overall all-cause 30-day mortality rate was 47.7 %. Fluconazole was the most widely used systemic antifungal. Candida albicans (58/137, 42.3 %), Candida glabrata (30/137, 21.9 %), Candida parapsilosis sensu stricto (23/137, 16.8 %), Candida tropicalis (10/137, 7.3 %) and Pichia kudriavzevii (Candida krusei) (4/137, 2.9 %) constituted almost 90 % of the isolates and 10 % of the species detected were rare yeast species (12/137; 8.7 %). The 21-plex PCR method correctly identified 97.1 % of the isolates, a higher percentage than the Vitek 2 showed (87.6 %).Conclusion. C. albicans was the main cause of yeast-derived fungaemia in this study. Future prospective studies are warranted to closely monitor the epidemiological landscape of yeast species causing BSIs in Iran. The superiority of 21-plex PCR over automated Vitek 2 indicates its potential clinical utility as an alternative identification tool use in developing countries.
Collapse
Affiliation(s)
- Mohammad Kord
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Salehi
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Sadegh Khodavaisy
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Jamal Hashemi
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Roshanak Daie Ghazvini
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Sassan Rezaei
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ayda Maleki
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Elmimoghaddam
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Neda Alijani
- Department of Infectious Diseases, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Abdollahi
- Department of Pathology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahsa Doomanlou
- Department of Pathology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Kazem Ahmadikia
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Niloofar Rashidi
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Weihua Pan
- Medical Mycology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003, PR China
| | - Teun Boekhout
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
- Institute of Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Amsterdam, The Netherlands
| | - Amir Arastehfar
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
- Institute of Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Amsterdam, The Netherlands
| |
Collapse
|
5
|
Shi Y, Zhu Y, Fan S, Liu X, Liang Y, Shan Y. Molecular identification and antifungal susceptibility profile of yeast from vulvovaginal candidiasis. BMC Infect Dis 2020; 20:287. [PMID: 32393342 PMCID: PMC7216708 DOI: 10.1186/s12879-020-04985-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 03/20/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Accurate identification Candida is important for successful therapy and epidemiology study. The aim of research is to study API 20C yeast identification system identification rate by using molecular identification as gold standard and tested the antifungal susceptibility of Candida from patients with vulvovaginal candidiasis (VVC). METHODS In total, 3574 yeast isolates were obtained from patients with VVC. API 20C yeast identification, molecular identification and in vitro antifungal susceptibility were performed. RESULTS C. albicans was the predominant Candida species [2748 isolates, 76.9%] in VVC. The isolates from vaginal samples represented 22 species based on molecular identification. The API 20C system identifies only 11 of the species encountered during the study period. Based on the API 20C system, 3273 (91.78%) isolates were correctly identified to the species level. The correct identification rate of the API 20C system for rare yeast was 15.29% (26/170 isolates). Antifungal susceptibility was tested in a total of 1844 isolates of Candida from patients with VVC. C. albicans was susceptible to most of the tested antifungals. The MICs of azoles for C. glabrata were higher than those for C. albicans. The MICs of echinocandins for C. parapsilosis were higher than those for C. albicans. CONCLUSIONS The API 20C yeast identification system can be used to reliably identify the most common Candida species while molecular methods are necessary for the identification of closely related, emerging, and rare yeast species. The results from this study suggest that much of the previous studies on the epidemiology of VVC should be re-thought. C. albicans was susceptible to most of the tested antifungals.
Collapse
Affiliation(s)
- Yu Shi
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, 518036, China.,Shenzhen Key Laboratory of Gynecological Diagnostic Technology Research, Shenzhen, 518036, China.,Anhui Medical University, Hefei, 230022, China
| | - Yuxia Zhu
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, 518036, China.,Shenzhen Key Laboratory of Gynecological Diagnostic Technology Research, Shenzhen, 518036, China
| | - Shangrong Fan
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, 518036, China. .,Shenzhen Key Laboratory of Gynecological Diagnostic Technology Research, Shenzhen, 518036, China. .,Anhui Medical University, Hefei, 230022, China.
| | - Xiaoping Liu
- Department of Laboratory Science, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Yiheng Liang
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, 518036, China.,Shenzhen Key Laboratory of Gynecological Diagnostic Technology Research, Shenzhen, 518036, China
| | - Yingying Shan
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, 518036, China.,Shenzhen Key Laboratory of Gynecological Diagnostic Technology Research, Shenzhen, 518036, China
| |
Collapse
|
6
|
Dupont D, Normand AC, Persat F, Hendrickx M, Piarroux R, Wallon M. Comparison of matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF MS) systems for the identification of moulds in the routine microbiology laboratory. Clin Microbiol Infect 2018; 25:892-897. [PMID: 30394360 DOI: 10.1016/j.cmi.2018.10.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 09/27/2018] [Accepted: 10/13/2018] [Indexed: 11/17/2022]
Abstract
OBJECTIVES The purpose of this study was to compare the efficiency of mould identification of two matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF MS) systems - Vitek MS (VMS) and Microflex LT (MLT) - and the MSI application. METHODS Moulds were collected retrospectively and prospectively to display epidemiological diversity of a microbiology laboratory. All of them were identified via sequencing. Strains were then identified using the VMS v3.0, the MLT, and the MSI software applied on MLT spectra. Rates of correct identifications to the species, to the complex, and to the genus level were compared with the molecular reference standard. RESULTS A total of 102 isolates were collected. The rate of correct identification to the species level with the MLT was 42.2% (43/102) with a threshold of 1.7 (vs. 16.7% (17/102) with a threshold of 2.0, p < 0.05). The VMS performed better than the MLT with a threshold of 1.7 for species (49.0% (50/102), p 0.33) and complex level identifications (71.6% (73/102) vs. 54.9% (56/102), p < 0.05). However the highest performances were observed when the MLT spectra were analysed via the Mass Spectrometry Identification (MSI) software reaching 90.2% (92/102) of correct identification to the species, 92.2% (94/102) to the species complex and 94.1% (96/102) to the genus level. CONCLUSIONS The VMS performed better than the MLT for mould identification. However, it remains of utmost importance to expand commercial databases, as performances of the MLT highly improved when using the MSI software and its extended database, reaching far above the VMS system. Thus the VMS could benefit from the use of this online tool.
Collapse
Affiliation(s)
- D Dupont
- Institut des Agents Infectieux, Parasitologie Mycologie, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Integrative Physiology of the Brain Arousal Systems, Centre de Recherche en Neurosciences de Lyon, INSERM U1028-CNRS UMR 5292, Faculté de Médecine, Université Claude Bernard Lyon 1, Lyon, France.
| | - A-C Normand
- Service de Parasitologie/Mycologie, Groupe Hospitalier Pitié-Salpêtrière, AP-HP, F-75013, Paris, France; Sorbonne Université, INSERM, Institut Pierre-Louis d'Epidémiologie et de Santé Publique, AP-HP, Hôpital Pitié-Salpêtrière, Paris, France
| | - F Persat
- Institut des Agents Infectieux, Parasitologie Mycologie, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France
| | - M Hendrickx
- Mycology & Aerobiology, Scientific Institute of Public Health, Brussels, Belgium
| | - R Piarroux
- Service de Parasitologie/Mycologie, Groupe Hospitalier Pitié-Salpêtrière, AP-HP, F-75013, Paris, France; Sorbonne Université, INSERM, Institut Pierre-Louis d'Epidémiologie et de Santé Publique, AP-HP, Hôpital Pitié-Salpêtrière, Paris, France
| | - M Wallon
- Institut des Agents Infectieux, Parasitologie Mycologie, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, Lyon, France; Integrative Physiology of the Brain Arousal Systems, Centre de Recherche en Neurosciences de Lyon, INSERM U1028-CNRS UMR 5292, Faculté de Médecine, Université Claude Bernard Lyon 1, Lyon, France
| |
Collapse
|
7
|
Lee H, Park JH, Oh J, Cho S, Koo J, Park IC, Kim J, Park S, Choi JS, Shin SY, Sung GH, Kim J. Evaluation of a new matrix-assisted laser desorption/ionization time-of-flight mass spectrometry system for the identification of yeast isolation. J Clin Lab Anal 2018; 33:e22685. [PMID: 30298531 DOI: 10.1002/jcla.22685] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/07/2018] [Accepted: 09/11/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Currently, three commercial in vitro diagnostic matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) systems are widely used in clinical laboratories. The ASTA MicroIDSys system (ASTA Inc, South Korea) is a newly developed MALDI-TOF MS system used for the identification of pathogenic microorganisms. In the present study, we assessed the performance of the ASTA MALDI-TOF MS system for the identification of pathogenic yeast from clinical samples. METHODS We tested 284 clinical yeast isolates from various clinical specimens using ASTA MALDI-TOF MS, and the results were compared with those using molecular sequencing of the ITS or D1-D2 regions of rDNA and biochemical assays. RESULTS A total of 284 isolates were tested and found to be distributed across 14 species including Candida albicans (n = 100) and other yeast species (n = 184). ASTA MALDI-TOF MS correctly identified 95.1% (270/284) of the yeast species compared to molecular sequencing. Among them, 262 isolates showed acceptable MALDI-TOF MS scores (≥140), and 98.1% (257/262) isolates were identified correctly. In addition, among 22 isolates with a MALDI-TOF MS score <140, 59.1% (13/22) of the isolates showed concordance with molecular typing at the species level. Clustering analysis revealed the effectiveness of the new MALDI-TOF MS system for the identification of yeast species. CONCLUSIONS ASTA MALDI-TOF MS showed high accuracy in the identification of yeast species; it involves facile sample preparation and extraction procedures. ASTA MALDI-TOF MS is expected to be useful for yeast identification in clinical microbiology laboratories due to its reliability and cost-effectiveness.
Collapse
Affiliation(s)
- Hyeyoung Lee
- Department of Laboratory Medicine, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Ji-Hyun Park
- Institute for Healthcare and Life Science, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Junsang Oh
- Institute for Healthcare and Life Science, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Sungil Cho
- Department of Laboratory Medicine, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Jehyun Koo
- Department of Laboratory Medicine, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Ik Chun Park
- Department of Laboratory Medicine, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Jiwoo Kim
- Department of Laboratory Medicine, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Sehyun Park
- Department of Laboratory Medicine, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Ji Seon Choi
- Department of Laboratory Medicine, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - So Youn Shin
- Department of Infectious Diseases, International St. Mary Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| | - Gi-Ho Sung
- Institute for Healthcare and Life Science, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea.,Department of Microbiology, College of Medicine, Catholic Kwandong University, Gangneung, Korea
| | - Jayoung Kim
- Department of Laboratory Medicine, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Korea
| |
Collapse
|
8
|
Cassagne C, Normand AC, L'Ollivier C, Ranque S, Piarroux R. Performance of MALDI-TOF MS platforms for fungal identification. Mycoses 2016; 59:678-690. [DOI: 10.1111/myc.12506] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 03/04/2016] [Accepted: 03/12/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Carole Cassagne
- Parasitology and Mycology; Assistance Publique-Hôpitaux de Marseille; CHU Timone-Adultes; Marseilles CEDEX 5 France
- Aix-Marseille University; UMR MD3 IP-TPT; Marseilles France
| | - Anne-Cécile Normand
- Parasitology and Mycology; Assistance Publique-Hôpitaux de Marseille; CHU Timone-Adultes; Marseilles CEDEX 5 France
| | - Coralie L'Ollivier
- Parasitology and Mycology; Assistance Publique-Hôpitaux de Marseille; CHU Timone-Adultes; Marseilles CEDEX 5 France
- Aix-Marseille University; UMR MD3 IP-TPT; Marseilles France
| | - Stéphane Ranque
- Parasitology and Mycology; Assistance Publique-Hôpitaux de Marseille; CHU Timone-Adultes; Marseilles CEDEX 5 France
- Aix-Marseille University; UMR MD3 IP-TPT; Marseilles France
| | - Renaud Piarroux
- Parasitology and Mycology; Assistance Publique-Hôpitaux de Marseille; CHU Timone-Adultes; Marseilles CEDEX 5 France
- Aix-Marseille University; UMR MD3 IP-TPT; Marseilles France
| |
Collapse
|