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Boriollo MFG, Oliveira MC, Bassinello V, Aníbal PC, da Silva TA, da Silva JJ, Bassi RC, Netto MFR, Dos Santos Dias CT, Höfling JF. Candida species biotypes and polyclonality of potentially virulent Candida albicans isolated from oral cavity of patients with orofacial clefts. Clin Oral Investig 2021; 26:3061-3084. [PMID: 34791549 DOI: 10.1007/s00784-021-04290-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 11/02/2021] [Indexed: 11/25/2022]
Abstract
OBJECTIVES This study evaluated the incidence of Candida species, and the genetic diversity and virulence of C. albicans of the oral cavity from patients with cleft lip and palate (CLP). MATERIALS AND METHODS Oral samples were investigated by microbiological and species-specific PCR methods. The genetic diversity of C. albicans was established using isoenzyme markers, Nei's statistics, and clustering analysis. Hydrolytic enzymes (SAPs and PLs) were analyzed in vitro. RESULTS Oral colonization by Candida species was observed in 29 patients with CLP (65.9%), and C. albicans was highly prevalent. SAP and PL activities were observed in 100% and 51.9% of isolates, respectively. High genetic diversity and patterns of monoclonal and polyclonal oral colonization by C. albicans were observed among patients with CLP. Two major polymorphic taxa (A and B) and other minor polymorphic taxa (C to J) were identified. Only one of the 16 clusters (taxon A) harbored strains from patients with and without CLP, whereas other clusters harbored strains exclusively from CLP patients. CONCLUSIONS The anatomical conditions of the oral cavity of patients with CLP contribute to the high incidence of Candida species (C. albicans, C. krusei, C. tropicalis, and/or Candida spp.). Data suggest high genetic diversity of potentially virulent C. albicans strains in the oral cavity of CLP patients. CLINICAL RELEVANCE Microbiological niches in orofacial clefts can contribute to the emergence of a relative clinical genotypic identity of C. albicans. However, orofacial rehabilitation centers can contribute to the direct and indirect sources of transmission and propagation of Candida species.
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Affiliation(s)
- Marcelo Fabiano Gomes Boriollo
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil.
| | - Mateus Cardoso Oliveira
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil
| | - Vanessa Bassinello
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil
| | - Paula Cristina Aníbal
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil
| | - Thaísla Andrielle da Silva
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil
| | - Jeferson Júnior da Silva
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil
| | - Rodrigo Carlos Bassi
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil
| | - Manoel Francisco Rodrigues Netto
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil
| | - Carlos Tadeu Dos Santos Dias
- Department of Exact Sciences, College of Agriculture, University of São Paulo (ESALQ/USP), 11 Pádua Dias Ave, Piracicaba, SP, 13418-900, Brazil
| | - José Francisco Höfling
- Department of Oral Diagnosis, Dental School of Piracicaba, University of Campinas (FOP/UNICAMP), 901 Limeira Ave, Piracicaba, SP, 13414-903, Brazil
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Differentiation of Candida albicans Species Complex by Tobacco Agar Obtained from Different Cigarette Brands Available in Colombia. Int J Microbiol 2020; 2020:5438967. [PMID: 32280345 PMCID: PMC7114770 DOI: 10.1155/2020/5438967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 02/18/2020] [Indexed: 11/17/2022] Open
Abstract
Introduction. The Candida albicans complex is formed by Candida albicans, Candida dubliniensis, and a biovar of C. albicans named Candida africana. These yeasts are recognized as globally distributed clinical pathogens and share most phenotypic characteristics, which makes their discrimination by conventional methods difficult. Aim. To evaluate the efficacy of different brands of cigarettes in the preparation of tobacco agar, for the differentiation of these related yeasts. Methodology. Tobacco agar was prepared using six brands and four varieties of cigarettes, and 125 clinical isolates previously identified by PCR and Maldi-Tof were used. To determine whether the results of the microbiological tests were associated with similarities in the chemical components of cigarettes, thin-layer chromatography was performed. Results. Candida dubliniensis colonies presented hue differences according to the incubation temperature and the brand or variety of cigarette used, except in the tobacco agar produced with Marlboro Xpress cigarette, where its differentiation was not possible. The chromatograms showed few differences among apolar and medium polarity extract components. Conclusions. Tobacco agar is a low-cost tool used for the differentiation of Candida dubliniensis; however, incubation temperature and cigarette brand affect the performance of the media. No relationship was found between the microbiological results and the chemical similarity of the extracts of the cigarettes by chromatography.
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Wiebusch L, de Almeida-Apolonio AA, Rodrigues LMC, de Paula Bicudo B, dos Santos Silva DB, Lonchiati DF, de Araujo RP, Grisolia AB, de Oliveira KMP. Candida albicans isolated from urine: Phenotypic and molecular identification, virulence factors and antifungal susceptibility. Asian Pac J Trop Biomed 2017. [DOI: 10.1016/j.apjtb.2017.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Livério HO, Ruiz LDS, Freitas RSD, Nishikaku A, Souza ACD, Paula CR, Domaneschi C. Phenotypic and genotypic detection of Candida albicans and Candida dubliniensis strains isolated from oral mucosa of AIDS pediatric patients. Rev Inst Med Trop Sao Paulo 2017; 59:e14. [PMID: 28423089 PMCID: PMC5398186 DOI: 10.1590/s1678-9946201759014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 02/14/2017] [Indexed: 11/29/2022] Open
Abstract
The aim of this study was to assess a collection of yeasts to verify the presence of Candida dubliniensis among strains isolated from the oral mucosa of AIDS pediatric patients which were initially characterized as Candida albicans by the traditional phenotypic method, as well as to evaluate the main phenotypic methods used in the discrimination between the two species and confirm the identification through genotypic techniques, i.e., DNA sequencing. Twenty-nine samples of C. albicans isolated from this population and kept in a fungi collection were evaluated and re-characterized. In order to differentiate the two species, phenotypic tests (Thermotolerance tests, Chromogenic medium, Staib agar, Tobacco agar, Hypertonic medium) were performed and genotypic techniques using DNA sequencing were employed for confirmation of isolated species. Susceptibility and specificity were calculated for each test. No phenotypic test alone was sufficient to provide definitive identification of C. dubliniensis or C. albicans, as opposed to results of molecular tests. After amplification and sequencing of specific regions of the 29 studied strains, 93.1% of the isolates were identified as C. albicans and 6.9% as C. dubliniensis. The Staib agar assay showed a higher susceptibility (96.3%) in comparison with other phenotypic techniques. Therefore, genotypic methods are indispensable for the conclusive identification and differentiation between these species.
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Affiliation(s)
- Harisson Oliveira Livério
- Universidade de São Paulo, Faculdade de Odontologia, Departamento de Estomatologia, São Paulo, São Paulo, Brazil
| | | | - Roseli Santos de Freitas
- Universidade de São Paulo, Instituto de Medicina Tropical de São Paulo, São Paulo, São Paulo, Brazil
| | - Angela Nishikaku
- Universidade Federal de São Paulo, Laboratório Especial de Micologia, São Paulo, São Paulo, Brazil
| | - Ana Clara de Souza
- Universidade de São Paulo, Faculdade de Odontologia, Departamento de Estomatologia, São Paulo, São Paulo, Brazil
| | - Claudete Rodrigues Paula
- Universidade de São Paulo, Faculdade de Odontologia, Departamento de Estomatologia, São Paulo, São Paulo, Brazil
| | - Carina Domaneschi
- Universidade de São Paulo, Faculdade de Odontologia, Departamento de Estomatologia, São Paulo, São Paulo, Brazil
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The usefulness of DNA sequencing after extraction by Whatman FTA filter matrix technology and phenotypic tests for differentiation of Candida albicans and Candida dubliniensis. Mycopathologia 2014; 177:81-6. [PMID: 24436014 DOI: 10.1007/s11046-014-9728-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 01/04/2014] [Indexed: 10/25/2022]
Abstract
Since C. dubliniensis is similar to C. albicans phenotypically, it can be misidentified as C. albicans. We aimed to investigate the prevalence of C. dubliniensis among isolates previously identified as C. albicans in our stocks and to compare the phenotypic methods and DNA sequencing of D1/D2 region on the ribosomal large subunit (rLSU) gene. A total of 850 isolates included in this study. Phenotypic identification was performed based on germ tube formation, chlamydospore production, colony colors on chromogenic agar, inability of growth at 45 °C and growth on hypertonic Sabouraud dextrose agar. Eighty isolates compatible with C. dubliniensis by at least one phenotypic test were included in the sequence analysis. Nested PCR amplification of D1/D2 region of the rLSU gene was performed after the fungal DNA extraction by Whatman FTA filter paper technology. The sequencing analysis of PCR products carried out by an automated capillary gel electrophoresis device. The rate of C. dubliniensis was 2.35 % (n = 20) among isolates previously described as C. albicans. Consequently, none of the phenotypic tests provided satisfactory performance alone in our study, and molecular methods required special equipment and high cost. Thus, at least two phenotypic methods can be used for identification of C. dubliniensis, and molecular methods can be used for confirmation.
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Ahmad S, Khan Z, Asadzadeh M, Theyyathel A, Chandy R. Performance comparison of phenotypic and molecular methods for detection and differentiation of Candida albicans and Candida dubliniensis. BMC Infect Dis 2012; 12:230. [PMID: 23009343 PMCID: PMC3541108 DOI: 10.1186/1471-2334-12-230] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Accepted: 09/24/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Candida albicans is the most pathogenic Candida species but shares many phenotypic features with Candida dubliniensis and may, therefore, be misidentified in clinical microbiology laboratories. Candidemia cases due to C. dubliniensis are increasingly being reported in recent years. Accurate identification is warranted since mortality rates are highest for C. albicans infections, however, C. dubliniensis has the propensity to develop resistance against azoles more easily. We developed a duplex PCR assay for rapid detection and differentiation of C. albicans from C. dubliniensis for resource-poor settings equipped with basic PCR technology and compared its performance with three phenotypic methods. METHODS Duplex PCR was performed on 122 germ tube positive and 12 germ tube negative isolates of Candida species previously identified by assimilation profiles on Vitek 2 ID-YST system. Typical morphologic characteristics on simplified sunflower seed agar (SSA), and reaction with a commercial (Bichro-Dubli) latex agglutination test were also performed. The assay was further applied on 239 clinical yeast and yeast-like fungi and results were confirmed by DNA sequencing of internal transcribed spacer (ITS) region of rDNA. RESULTS The results of duplex PCR assay for 122 germ tube positive and 12 germ tube negative isolates of Candida species were comparable to their identification by Vitek 2 ID-YST system, colony characteristics on SSA and latex agglutination test. Application of duplex PCR also correctly identified all 148 C. albicans and 50 C. dubliniensis strains among 239 yeast-like fungi. CONCLUSIONS The data show that both, duplex PCR and Bichro-Dubli are reliable tests for rapid (within few hours) identification of clinical yeast isolates as C. dubliniensis or C. albicans. However, duplex PCR may be applied directly on clinical yeast isolates for their identification as C. dubliniensis or C. albicans as it does not require prior testing for germ tube formation or latex Candida agglutination.
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Affiliation(s)
- Suhail Ahmad
- Department of Microbiology, Faculty of Medicine, Kuwait University, Safat, Kuwait.
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