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Shintani T, Naito M, Obayashi N, Ando T, Kawaguchi H, Yanamoto S, Kajiya M, Sugita M. Resting Saliva Volume as a Risk Factor for Hypogeusia: A Retrospective Study. Physiol Behav 2023; 267:114224. [PMID: 37148986 DOI: 10.1016/j.physbeh.2023.114224] [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: 12/23/2022] [Revised: 04/21/2023] [Accepted: 05/03/2023] [Indexed: 05/08/2023]
Abstract
OBJECTIVES The causes of hypogeusia include zinc deficiency, systemic illness, and consumption of drugs. Notably, patients with oral cavity diseases such as oral candidiasis and salivary gland hypofunction may present with risk factors that remain unreported. Hence, this study aimed to investigate the relationship between age, sex, smoking status, serum zinc concentration, oral candidiasis, saliva volume, and taste function in patients with hypogeusia. SUBJECTS AND METHODS Overall, 335 participants who complained of taste abnormalities underwent a taste test. Based on the recognition threshold value, the participants were classified as normal individuals (recognition threshold of 1 and 2) and patients with hypogeusia (recognition threshold of ≥3). The clinical characteristics, including resting saliva volume (RSV) and stimulated saliva volume (SSV), were compared, and a multivariate logistic regression analysis focusing on RSV was performed. RESULTS Patients with hypogeusia had a lower RSV than normal individuals for all tastes, but not for SSV. Based on the results of regression analysis, RSV was identified as an independent predictor of hypogeusia for salty and bitter tastes. Moreover, the proportion of patients with decreased RSV increased as the number of taste qualities exceeding the reference recognition threshold increased. Furthermore, a decrease in RSV was associated with an increase in the recognition threshold for salty and bitter tastes. CONCLUSIONS Based on the results of the present study, moisturizing the oral cavity may be useful against hypogeusia.
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Affiliation(s)
- Tomoaki Shintani
- Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan.
| | - Mariko Naito
- Department of Oral Epidemiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Nami Obayashi
- Department of General Dentistry, Hiroshima University Hospital, Hiroshima, Japan
| | - Toshinori Ando
- Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan
| | - Hiroyuki Kawaguchi
- Department of General Dentistry, Hiroshima University Hospital, Hiroshima, Japan
| | - Souichi Yanamoto
- Department of Oral Oncology, Graduate School of Biomedical and Health Sciences, Hiroshima, Hiroshima University, Japan
| | - Mikihito Kajiya
- Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan
| | - Makoto Sugita
- Department of Physiology and Oral Physiology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, 734-8553, Japan
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What Is Candida Doing in My Food? A Review and Safety Alert on Its Use as Starter Cultures in Fermented Foods. Microorganisms 2022; 10:microorganisms10091855. [PMID: 36144457 PMCID: PMC9502980 DOI: 10.3390/microorganisms10091855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/02/2022] [Accepted: 09/07/2022] [Indexed: 12/02/2022] Open
Abstract
The use of yeasts as starter cultures was boosted with the emergence of large-scale fermentations in the 20th century. Since then, Saccharomyces cerevisiae has been the most common and widely used microorganism in the food industry. However, Candida species have also been used as an adjuvant in cheese production or as starters for coffee, cocoa, vegetable, meat, beer, and wine fermentations. A thorough screening of candidate Candida is sometimes performed to obtain the best performing strains to enhance specific features. Some commonly selected species include C. pulcherrima (teleomorph Metschnikowia pulcherrima) (wine), C. parapsilosis (teleomorph Monilia parapsilosis) (coffee), C. famata (teleomorph Debaryomyces hansenii) (cheese), and C. zeylanoides (teleomorph Kurtzmaniella zeylanoides) and C. norvegensis (teleomorph Pichia norvegensis) (cocoa). These species are associated with the production of key metabolites (food aroma formation) and different enzymes. However, safety-associated selection criteria are often neglected. It is widely known that some Candida species are opportunistic human pathogens, with important clinical relevance. Here, the physiology and metabolism of Candida species are addressed, initially emphasizing their clinical aspects and potential pathogenicity. Then, Candida species used in food fermentations and their functional roles are reported. We recommended that Candida not be used as food cultures if safety assessments are not performed. Some safety features are highlighted to help researchers choose methods and selection criteria.
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Barantsevich N, Barantsevich E. Diagnosis and Treatment of Invasive Candidiasis. Antibiotics (Basel) 2022; 11:antibiotics11060718. [PMID: 35740125 PMCID: PMC9219674 DOI: 10.3390/antibiotics11060718] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/14/2022] [Accepted: 05/18/2022] [Indexed: 02/06/2023] Open
Abstract
Candida species, belonging to commensal microbial communities in humans, cause opportunistic infections in individuals with impaired immunity. Pathogens encountered in more than 90% cases of invasive candidiasis include C. albicans, C. glabrata, C. krusei, C. tropicalis, and C. parapsilosis. The most frequently diagnosed invasive infection is candidemia. About 50% of candidemia cases result in deep-seated infection due to hematogenous spread. The sensitivity of blood cultures in autopsy-proven invasive candidiasis ranges from 21% to 71%. Non-cultural methods (beta-D-glucan, T2Candida assays), especially beta-D-glucan in combination with procalcitonin, appear promising in the exclusion of invasive candidiasis with high sensitivity (98%) and negative predictive value (95%). There is currently a clear deficiency in approved sensitive and precise diagnostic techniques. Omics technologies seem promising, though require further development and study. Therapeutic options for invasive candidiasis are generally limited to four classes of systemic antifungals (polyenes, antimetabolite 5-fluorocytosine, azoles, echinocandins) with the two latter being highly effective and well-tolerated and hence the most widely used. Principles and methods of treatment are discussed in this review. The emergence of pan-drug-resistant C. auris strains indicates an insufficient choice of available medications. Further surveillance, alongside the development of diagnostic and therapeutic methods, is essential.
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Perez G, Debernardis F, Boido E, Carrau F. Simultaneous identification to monitor consortia strain dynamics of four biofuel yeast species during fermentation. J Ind Microbiol Biotechnol 2020; 47:1133-1140. [PMID: 32965544 DOI: 10.1007/s10295-020-02310-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 09/07/2020] [Indexed: 11/28/2022]
Abstract
Mixed strain dynamics are still not well or easily monitored although recently molecular identification methods have improved our knowledge. This study used a chromogenic differential plating medium that allows the discrimination of four of the main selected biofuel strains that are currently under development for ethanol production from cellulosic hydrolysates. Complete fermentation of hexoses and xylose was obtained with a yeast consortium composed of Spathaspora passalidarum, Scheffersomyces stipitis, Candida akabanensis and Saccharomyces cerevisiae. The results showed that C.akabanensis excessively dominated consortium balance. Reducing its inoculum from 33 to 4.8% improved population strain balance and fermentation efficiency. Comparison of the consortia with single strain fermentations showed that it optimize sugar consumption and ethanol yields. This simple and cheap method also has advantages compared with molecular methods, as the yeast strains do not need to be genetically marked and identified cell proportions are probably active in the fermentation system as compared to DNA determination methods.
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Affiliation(s)
- Gabriel Perez
- Área Enología y Biotecnología de la Fermentación, Departamento Ciencia y Tecnología Alimentos, Facultad de Quimica, Universidad de la Republica, 11800, Montevideo, Uruguay
| | - Florencia Debernardis
- Área Enología y Biotecnología de la Fermentación, Departamento Ciencia y Tecnología Alimentos, Facultad de Quimica, Universidad de la Republica, 11800, Montevideo, Uruguay
| | - Eduardo Boido
- Área Enología y Biotecnología de la Fermentación, Departamento Ciencia y Tecnología Alimentos, Facultad de Quimica, Universidad de la Republica, 11800, Montevideo, Uruguay
| | - Francisco Carrau
- Área Enología y Biotecnología de la Fermentación, Departamento Ciencia y Tecnología Alimentos, Facultad de Quimica, Universidad de la Republica, 11800, Montevideo, Uruguay.
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Antifungal Efficacy of Chitosan-Stabilized Biogenic Silver Nanoparticles against Pathogenic Candida spp. Isolated from Human. BIONANOSCIENCE 2020. [DOI: 10.1007/s12668-020-00781-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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6
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Scharmann U, Kirchhoff L, Chapot VLS, Dziobaka J, Verhasselt HL, Stauf R, Buer J, Steinmann J, Rath PM. Comparison of four commercially available chromogenic media to identify Candida albicans and other medically relevant Candida species. Mycoses 2020; 63:823-831. [PMID: 32449997 DOI: 10.1111/myc.13119] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 05/18/2020] [Accepted: 05/19/2020] [Indexed: 01/06/2023]
Abstract
BACKGROUND The number of invasive Candida infections has significantly increased in recent decades. For the successful treatment of fungal infections, rapid identification at the species level, particularly in polyfungal infections, is a key factor. In this study, four commercially available chromogenic media, CandiSelect™ 4 (CS4), chromID™ Candida Agar (CCA), BBL™ CHROMagar™ Candida Medium (BBL) and Brilliance™ Candida Agar (BCA) were evaluated for Candida identification. MATERIAL/METHODS Overall, 181 bronchial secretion samples from intensive care patients were analysed prospectively. In addition, 18 primarily sterile materials, previously tested positive for Candida, were investigated retrospectively. All samples were cultured as recommended by the manufacturer and visually inspected after 24 and 48 hours by three independent investigators. As a control, colonies were identified by MALDI-TOF MS. Specificity and sensitivity were determined for C albicans identification prospectively. RESULTS CS4 and BCA showed the best overall consensus with the identification results reached by MALDI-TOF MS for Candida albicans and species. A clear differentiation between the species could be ascertained via easily identifiable, species-specific coloration in contrast to BBL and CCA. Sensitivity for C albicans (n = 73) identification varied between 32% (BCA) and 69% (CS4 and CCA) after 24 hours and 68% (BBL) and 82% (BCA) after 48 hours incubation, while specificity ranged between 62% (BBL) and 81% (CCA) after 24 hours and 82% (BBL) and 85% (CS4) after 48 hours. CONCLUSION CS4 and BCA are recommended for routine identification of Candida species in human samples.
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Affiliation(s)
- Ulrike Scharmann
- Institute of Medical Microbiology, University Hospital Essen, Essen, Germany
| | - Lisa Kirchhoff
- Institute of Medical Microbiology, University Hospital Essen, Essen, Germany
| | | | - Jan Dziobaka
- Institute of Medical Microbiology, University Hospital Essen, Essen, Germany
| | | | - Raphael Stauf
- Institute of Clinical Hygiene, Medical Microbiology and Infectiology, Paracelsus Medical University, Nuremberg, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, Essen, Germany
| | - Joerg Steinmann
- Institute of Medical Microbiology, University Hospital Essen, Essen, Germany.,Institute of Clinical Hygiene, Medical Microbiology and Infectiology, Paracelsus Medical University, Nuremberg, Germany
| | - Peter-Michael Rath
- Institute of Medical Microbiology, University Hospital Essen, Essen, Germany
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El-Houssaini HH, Elnabawy OM, Nasser HA, Elkhatib WF. Correlation between antifungal resistance and virulence factors in Candida albicans recovered from vaginal specimens. Microb Pathog 2019; 128:13-19. [DOI: 10.1016/j.micpath.2018.12.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 12/12/2018] [Accepted: 12/14/2018] [Indexed: 01/12/2023]
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Roohani AH, Fatima N, Shameem M, Khan HM, Khan PA, Akhtar A. Comparing the profile of respiratory fungal pathogens amongst immunocompetent and immunocompromised hosts, their susceptibility pattern and correlation of various opportunistic respiratory fungal infections and their progression in relation to the CD4+T-cell counts. Indian J Med Microbiol 2019; 36:408-415. [PMID: 30429396 DOI: 10.4103/ijmm.ijmm_18_258] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Introduction Invasive fungal infections are increasingly common in the nosocomial setting. Materials and Methods The patients were divided into two groups immunocompetent and immunocompromised that is, patients with significant neutropenia <500 neutrophils/μl for longer than 10 days. microscopy, culture, identification of isolates were done and some specilised tests on serum and BAL for antigen detection were performed. Results Majority of the patients were young adult males in this study. A higher prevalence of 26.7% was seen in immunocompromised patients. Amongst yeasts, Candida albicans was the predominant species followed by the National AIDS Control that is, Candida glabrata, Candida dubliniensis, Candida parapsilosis and Candida tropicalis in the same order. Amongst moulds, Aspergillus fumigatus was the most common species followed by Aspergillus flavus and Aspergillus niger. Mucor and Penicillium marneffei were seen in a lower prevalence. By Broth microdilution method, isolates of Candida spp. were most sensitive to caspofungin, amphotericin B, ketoconazole and fluconazole in the same order. Isolates of Aspergillus spp. were most sensitive to caspofungin, amphotericin B and itraconazole in the same order. By disc diffusion method, resistance to fluconazole was observed in 6.9% isolates of C. albicans. 50% of C. dubliniensis and 20% of C. glabrata showed resistance to fluconazole. A total mortality of 27.7% was observed during this study. This was distributed as 24.1%, 26.7%, 50%, 50%, 100% and 0% among by patients of candidiasis, aspergillosis, cryptococcosis, pneumocystosis, mucormycosis and penicilliosis. Fifteen per cent were lost to follow-up. Conclusion Patterns of invasive fungal infections are changing in many ways. In the midst of these evolving trends, IFI of the respiratory tractcontinue to remain important causes of morbidity and mortality. Diagnostic tools can be adequately used only if the treating physician is aware of the propensity of patients to acquire a fungal infection. Thus, continuous awareness and education is crucial for successful management of patients. Judicious use of antifungal medications as prophylactic measures must be employed, particularly in the critically ill and patients of HIV.
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Affiliation(s)
| | - Nazish Fatima
- Department of Microbiology, JNMC, AMU, Aligarh, Uttar Pradesh, India
| | - Mohammad Shameem
- Department of TB Chest and Respiratory Disease, JNMC, AMU, Aligarh, Uttar Pradesh, India
| | | | - Parvez Anwar Khan
- Department of Microbiology, JNMC, AMU, Aligarh, Uttar Pradesh, India
| | - Anees Akhtar
- Department of Microbiology, JNMC, AMU, Aligarh, Uttar Pradesh, India
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9
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De-La-Torre J, Quindós G, Marcos-Arias C, Marichalar-Mendia X, Gainza ML, Eraso E, Acha-Sagredo A, Aguirre-Urizar JM. Oral Candida colonization in patients with chronic periodontitis. Is there any relationship? Rev Iberoam Micol 2018; 35:134-139. [PMID: 30082174 DOI: 10.1016/j.riam.2018.03.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 02/13/2018] [Accepted: 03/14/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Candida can be implicated in the pathology of chronic periodontitis. AIMS To analyze the oral Candida carriage in patients suffering from chronic periodontitis (CP) and its correlation with the severity of this condition. METHODS Microbiological samples were taken from 155 patients using the oral rinse (OR) technique and by using paper points in the periodontal pockets (GPP). These patients were divided into 3 groups: 89 patients without CP (control), 47 with moderate CP, and 19 with severe CP. Samples were cultured in a Candida chromogenic agar for Candida. Species were identified by microbiological and molecular methods. RESULTS Candida was isolated in the OR of 45 (50.6%), 21 (44.7%), and 11 (57.9%) patients, respectively, and in the GPP of 32 (36%), 14 (29.2%), and 10 (42.6%) patients from the control, moderate CP and severe CP groups, respectively. Candida was isolated more frequently and in a greater burden in OR than in GPP (p<0.01). Candida albicans was the most prevalent species. GPP of patients with CP had poor fungal biodiversity (p<0.01). CONCLUSIONS Colonization by Candida was present in the samples of patients without CP, and with both moderate and severe CP. Nonetheless, patients with severe CP had a higher rate of Candida colonization, especially by C. albicans.
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Affiliation(s)
- Janire De-La-Torre
- Department of Immunology, Microbiology and Parasitology, Unidad de formación e investigación multidisciplinar "Microbios y Salud" (UFI 11/25), Faculty of Medicine and Dentistry, University of the Basque Country/Euskal Herriko Unibertsitatea, Leioa, Spain; Department of Stomatology II, Unidad de formación e investigación multidisciplinar "Microbios y Salud" (UFI 11/25), Faculty of Medicine and Dentistry, University of the Basque Country/Euskal Herriko Unibertsitatea, Leioa, Spain.
| | - Guillermo Quindós
- Department of Immunology, Microbiology and Parasitology, Unidad de formación e investigación multidisciplinar "Microbios y Salud" (UFI 11/25), Faculty of Medicine and Dentistry, University of the Basque Country/Euskal Herriko Unibertsitatea, Leioa, Spain
| | - Cristina Marcos-Arias
- Department of Immunology, Microbiology and Parasitology, Unidad de formación e investigación multidisciplinar "Microbios y Salud" (UFI 11/25), Faculty of Medicine and Dentistry, University of the Basque Country/Euskal Herriko Unibertsitatea, Leioa, Spain
| | - Xabier Marichalar-Mendia
- Department of Stomatology II, Unidad de formación e investigación multidisciplinar "Microbios y Salud" (UFI 11/25), Faculty of Medicine and Dentistry, University of the Basque Country/Euskal Herriko Unibertsitatea, Leioa, Spain
| | - María Luisa Gainza
- Department of Dental Surgery, Faculty of Dental Surgery, University of Malta, Malta
| | - Elena Eraso
- Department of Immunology, Microbiology and Parasitology, Unidad de formación e investigación multidisciplinar "Microbios y Salud" (UFI 11/25), Faculty of Medicine and Dentistry, University of the Basque Country/Euskal Herriko Unibertsitatea, Leioa, Spain
| | - Amelia Acha-Sagredo
- Department of Stomatology II, Unidad de formación e investigación multidisciplinar "Microbios y Salud" (UFI 11/25), Faculty of Medicine and Dentistry, University of the Basque Country/Euskal Herriko Unibertsitatea, Leioa, Spain
| | - José Manuel Aguirre-Urizar
- Department of Stomatology II, Unidad de formación e investigación multidisciplinar "Microbios y Salud" (UFI 11/25), Faculty of Medicine and Dentistry, University of the Basque Country/Euskal Herriko Unibertsitatea, Leioa, Spain
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Miranda-Cadena K, Marcos-Arias C, Mateo E, Aguirre JM, Quindós G, Eraso E. Prevalence and antifungal susceptibility profiles of Candida glabrata, Candida parapsilosis and their close-related species in oral candidiasis. Arch Oral Biol 2018; 95:100-107. [PMID: 30096698 DOI: 10.1016/j.archoralbio.2018.07.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 07/18/2018] [Accepted: 07/30/2018] [Indexed: 01/12/2023]
Abstract
OBJECTIVE To evaluate the importance of Candida glabrata, Candida parapsilosis and their close-related species, Candida bracarensis, Candida nivariensis, Candida metapsilosis and Candida orthopsilosis in patients with oral candidiasis and, to determine the in vitro activities of antifungal drugs currently used for the treatment. METHODS One hundred fourteen isolates of C. glabrata and 97 of C. parapsilosis, previously identified by conventional mycological methods, were analysed by molecular techniques. In vitro antifungal susceptibility to fluconazole, itraconazole, miconazole, and nystatin was evaluated by CLSI M44-A2 disk diffusion test, and by CLSI M27-A3 microdilution for fluconazole. RESULTS All C. glabrata isolates were identified as C. glabrata sensu stricto, 93 out of 97 C. parapsilosis isolates as C. parapsilosis sensu stricto, three as C. orthopsilosis and one as C. metapsilosis. Candida glabrata was mainly isolated in mixed cultures but C. parapsilosis complex was more frequent in pure culture. Candida metapsilosis and C. orthopsilosis were isolated as pure culture and both species were susceptible to all antifungal agents tested. Most C. glabrata isolates were susceptible to miconazole and nystatin, but resistant to fluconazole and itraconazole. Azole cross resistance was also observed. Candida parapsilosis isolates were susceptible to fluconazole although azole cross resistance to miconazole and itraconazole was observed. CONCLUSION This study highlights the importance of accurate identification and antifungal susceptibility testing of oral Candida isolates in order to have an in-depth understanding of the role of C. glabrata and C. parapsilosis in oral candidiasis.
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Affiliation(s)
- Katherine Miranda-Cadena
- UFI 11/25 "Microbios y Salud", Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Enfermería, Universidad del País Vasco/Euskal Herriko Unibertsitatea, UPV/EHU, Bilbao, Spain
| | - Cristina Marcos-Arias
- UFI 11/25 "Microbios y Salud", Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Enfermería, Universidad del País Vasco/Euskal Herriko Unibertsitatea, UPV/EHU, Bilbao, Spain
| | - Estibaliz Mateo
- UFI 11/25 "Microbios y Salud", Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Enfermería, Universidad del País Vasco/Euskal Herriko Unibertsitatea, UPV/EHU, Bilbao, Spain
| | - José Manuel Aguirre
- UFI 11/25 "Microbios y Salud", Departamento de Estomatología II, Facultad de Medicina y Enfermería, Universidad del País Vasco/Euskal Herriko Unibertsitatea, UPV/EHU, Bilbao, Spain
| | - Guillermo Quindós
- UFI 11/25 "Microbios y Salud", Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Enfermería, Universidad del País Vasco/Euskal Herriko Unibertsitatea, UPV/EHU, Bilbao, Spain
| | - Elena Eraso
- UFI 11/25 "Microbios y Salud", Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Enfermería, Universidad del País Vasco/Euskal Herriko Unibertsitatea, UPV/EHU, Bilbao, Spain.
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Brandão L, Boniek D, Resende Stoianoff M, da Mata F, de Azevedo P, Fernandes J, Andrade V. Prevalence and antifungal susceptibility of Candida
species among pregnant women attending a school maternity at Natal, Brazil. Lett Appl Microbiol 2018; 67:285-291. [DOI: 10.1111/lam.13034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 01/26/2023]
Affiliation(s)
- L.D.S. Brandão
- Departamento de Microbiologia e Parasitologia, Centro de Biociências; Universidade Federal do Rio Grande do Norte, UFRN; Natal Rio Grande do Norte Brazil
| | - D. Boniek
- Departamento de Microbiologia; Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG; Belo Horizonte Minas Gerais Brazil
| | - M.A. Resende Stoianoff
- Departamento de Microbiologia; Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG; Belo Horizonte Minas Gerais Brazil
| | - F.M.R. da Mata
- Departamento de Microbiologia; Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, UFMG; Belo Horizonte Minas Gerais Brazil
| | - P.R.M. de Azevedo
- Departamento de Estatística, Centro de Ciências Exatas da Terra; Universidade Federal do Rio Grande do Norte, UFRN; Natal Rio Grande do Norte Brazil
| | - J.V. Fernandes
- Departamento de Microbiologia e Parasitologia, Centro de Biociências; Universidade Federal do Rio Grande do Norte, UFRN; Natal Rio Grande do Norte Brazil
| | - V.S. Andrade
- Departamento de Microbiologia e Parasitologia, Centro de Biociências; Universidade Federal do Rio Grande do Norte, UFRN; Natal Rio Grande do Norte Brazil
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12
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De-la-Torre J, Ortiz-Samperio ME, Marcos-Arias C, Marichalar-Mendia X, Eraso E, Echebarria-Goicouria MÁ, Aguirre-Urizar JM, Quindós G. In Vitro Antifungal Susceptibility of Oral Candida Isolates from Patients Suffering from Caries and Chronic Periodontitis. Mycopathologia 2017; 182:471-485. [PMID: 28124220 DOI: 10.1007/s11046-017-0112-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 01/09/2017] [Indexed: 12/19/2022]
Abstract
Caries and chronic periodontitis are common oral diseases where a higher Candida colonization is reported. Antifungal agents could be adjuvant drugs for the therapy of both clinical conditions. The aim of the current study has been to evaluate the in vitro activities of conventional and new antifungal drugs against oral Candida isolates from patients suffering from caries and/or chronic periodontitis. In vitro activities of amphotericin B, fluconazole, itraconazole, miconazole, nystatin, posaconazole and voriconazole against 126 oral Candida isolates (75 Candida albicans, 18 Candida parapsilosis, 11 Candida dubliniensis, six Candida guilliermondii, five Candida lipolytica, five Candida glabrata, four Candida tropicalis and two Candida krusei) from 61 patients were tested by the CLSI M27-A3 method. Most antifungal drugs were highly active, and resistance was observed in less than 5% of tested isolates. Miconazole was the most active antifungal drug, being more than 98% of isolates susceptible. Fluconazole, itraconazole, and the new triazoles, posaconazole and voriconazole, were also very active. Miconazole, fluconazole and voriconazole have excellent in vitro activities against all Candida isolates and could represent suitable treatment for a hypothetically adjunctive therapy of caries and chronic periodontitis.
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Affiliation(s)
- Janire De-la-Torre
- Laboratorio de Micología Médica, Departamento de Inmunología, Microbiología y Parasitología, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Apartado 699, 48080, Bilbao, Spain
- Unidad de Medicina Bucal, Servicio Clínica Odontológica, Departamento de Estomatología II, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Bilbao, Spain
| | - María Esther Ortiz-Samperio
- Laboratorio de Micología Médica, Departamento de Inmunología, Microbiología y Parasitología, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Apartado 699, 48080, Bilbao, Spain
| | - Cristina Marcos-Arias
- Laboratorio de Micología Médica, Departamento de Inmunología, Microbiología y Parasitología, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Apartado 699, 48080, Bilbao, Spain
| | - Xabier Marichalar-Mendia
- Unidad de Medicina Bucal, Servicio Clínica Odontológica, Departamento de Estomatología II, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Bilbao, Spain
| | - Elena Eraso
- Laboratorio de Micología Médica, Departamento de Inmunología, Microbiología y Parasitología, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Apartado 699, 48080, Bilbao, Spain
| | - María Ángeles Echebarria-Goicouria
- Unidad de Medicina Bucal, Servicio Clínica Odontológica, Departamento de Estomatología II, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Bilbao, Spain
| | - José Manuel Aguirre-Urizar
- Unidad de Medicina Bucal, Servicio Clínica Odontológica, Departamento de Estomatología II, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Bilbao, Spain
| | - Guillermo Quindós
- Laboratorio de Micología Médica, Departamento de Inmunología, Microbiología y Parasitología, UFI 11/25, Facultad de Medicina y Enfermería, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Apartado 699, 48080, Bilbao, Spain.
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Souza MN, Ortiz SO, Mello MM, Oliveira FDM, Severo LC, Goebel CS. COMPARISON BETWEEN FOUR USUAL METHODS OF IDENTIFICATION OF Candida SPECIES. Rev Inst Med Trop Sao Paulo 2016; 57:281-7. [PMID: 26422150 PMCID: PMC4616911 DOI: 10.1590/s0036-46652015000400002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Infection by Candidaspp. is associated with high mortality rates, especially when treatment is not appropriate and/or not immediate. Therefore, it is necessary to correctly identify the genus and species of Candida. The aim of this study was to compare the identification of 89 samples of Candida spp. by the manual methods germ tube test, auxanogram and chromogenic medium in relation to the ID 32C automated method. The concordances between the methods in ascending order, measured by the Kappa index were: ID 32C with CHROMagar Candida(κ = 0.38), ID 32C with auxanogram (κ = 0.59) and ID 32C with germ tube (κ = 0.9). One of the species identified in this study was C. tropicalis,which demonstrated a sensitivity of 46.2%, a specificity of 95.2%, PPV of 80%, NPV of 81.1%, and an accuracy of 80.9% in tests performed with CHROMagar Candida;and a sensitivity of 76.9%, a specificity of 96.8%, PPV of 90.9%, NPV of 91%, and an accuracy of 91% in the auxanogram tests. Therefore, it is necessary to know the advantages and limitations of methods to choose the best combination between them for a fast and correct identification of Candidaspecies.
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Affiliation(s)
| | | | | | | | - Luiz Carlos Severo
- Irmandade Santa Casa de Misericórdia de Porto Alegre, Porto Alegre, RS, BR
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Improved detection of deeply invasive candidiasis with DNA aptamers specific binding to (1→3)-β-D-glucans from Candida albicans. Eur J Clin Microbiol Infect Dis 2016; 35:587-95. [PMID: 26810058 DOI: 10.1007/s10096-015-2574-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 12/30/2015] [Indexed: 01/02/2023]
Abstract
Deeply invasive or disseminated candidiasis is a serious and often fatal complication that can occur frequently in immuno-compromised individuals. However, conventional diagnostic methods of Candida albicans display low sensitivity and lack of specificity; the development of rapid and accurate detection methods remains a high priority. Aptamers are single-strand DNA or RNA oligonucleotides that specifically bind to target molecules with high affinity. In this study, we sought to screen high-affinity DNA aptamers that specifically bound to (1→3)-β-D-glucans from cell wall of Candida albicans using a systematic evolution of ligands by exponential enrichment (SELEX) technique, and further evaluate the diagnostic potential for invasive or disseminated candidiasis with selected aptamers. (1→3)-β-D-glucans was purified from Candida albicans, and two single DNA aptamers (designated as AU1 and AD1) were selected. Analysis of dissociation constants and binding domains further revealed that these two selected single DNA aptamers (AU1 and AD1) showed high binding affinity (AD1: Kd = 79.76 nM, AD1: Kd = 103.7 nM) and did not bind to the same domain of (1→3)-β-D-glucans. Next, we further detected (1→3)-β-D-glucans in serum samples from different groups of patients with Candida albicans infection or simple bacterial infection by using a double-aptamer sandwich enzyme-linked oligonucleotide assay (ELONA). The results showed that the sensitivity and specificity of this aptamer-based sandwich ELONA were 92.31 % and 91.94 % respectively. Thus, our study suggests that AU1 and AD1 have potential application for the differentiate diagnosis of deeply invasive candidiasis and provide valuable clues for designing diagnostic agents for the identification of invasive fungal infection.
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De-la-Torre J, Marichalar-Mendia X, Varona-Barquin A, Marcos-Arias C, Eraso E, Aguirre-Urizar JM, Quindós G. Caries andCandidacolonisation in adult patients in Basque Country (Spain). Mycoses 2016; 59:234-240. [DOI: 10.1111/myc.12453] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 11/20/2015] [Accepted: 12/03/2015] [Indexed: 01/12/2023]
Affiliation(s)
- Janire De-la-Torre
- Departamento de Inmunología; Microbiología y Parasitología; Unidad de Formación e Investigación multidisciplinar «Microbios y Salud» (UFI 11/25); Facultad de Medicina y Odontología; Universidad del País Vasco/Euskal Herriko Unibertsitatea; Bilbao Spain
- Departamento de Estomatología II; Unidad de Formación e Investigación multidisciplinar «Microbios y Salud» (UFI 11/25); Facultad de Medicina y Odontología; Universidad del País Vasco/Euskal Herriko Unibertsitatea; Bilbao Spain
| | - Xabier Marichalar-Mendia
- Departamento de Estomatología II; Unidad de Formación e Investigación multidisciplinar «Microbios y Salud» (UFI 11/25); Facultad de Medicina y Odontología; Universidad del País Vasco/Euskal Herriko Unibertsitatea; Bilbao Spain
| | - Aketza Varona-Barquin
- Departamento de Inmunología; Microbiología y Parasitología; Unidad de Formación e Investigación multidisciplinar «Microbios y Salud» (UFI 11/25); Facultad de Medicina y Odontología; Universidad del País Vasco/Euskal Herriko Unibertsitatea; Bilbao Spain
| | - Cristina Marcos-Arias
- Departamento de Inmunología; Microbiología y Parasitología; Unidad de Formación e Investigación multidisciplinar «Microbios y Salud» (UFI 11/25); Facultad de Medicina y Odontología; Universidad del País Vasco/Euskal Herriko Unibertsitatea; Bilbao Spain
| | - Elena Eraso
- Departamento de Inmunología; Microbiología y Parasitología; Unidad de Formación e Investigación multidisciplinar «Microbios y Salud» (UFI 11/25); Facultad de Medicina y Odontología; Universidad del País Vasco/Euskal Herriko Unibertsitatea; Bilbao Spain
| | - José Manuel Aguirre-Urizar
- Departamento de Estomatología II; Unidad de Formación e Investigación multidisciplinar «Microbios y Salud» (UFI 11/25); Facultad de Medicina y Odontología; Universidad del País Vasco/Euskal Herriko Unibertsitatea; Bilbao Spain
| | - Guillermo Quindós
- Departamento de Inmunología; Microbiología y Parasitología; Unidad de Formación e Investigación multidisciplinar «Microbios y Salud» (UFI 11/25); Facultad de Medicina y Odontología; Universidad del País Vasco/Euskal Herriko Unibertsitatea; Bilbao Spain
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Albaina O, Sahand IH, Brusca MI, Sullivan DJ, Fernández de Larrinoa I, Moragues MD. Identification and characterization of nine atypical Candida dubliniensis clinical isolates. J Med Microbiol 2014; 64:147-156. [PMID: 25480879 DOI: 10.1099/jmm.0.078832-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Candida dubliniensis is a pathogenic yeast of the genus Candida closely related to Candida albicans. The phenotypic similarity of these two species often leads to misidentification of C. dubliniensis isolates in clinical samples. DNA-based methods continue to be the most effective means of discriminating accurately between the two species. Here, we report on the identification of nine unusual Candida isolates that showed ambiguous identification patterns on the basis of their phenotypic and immunological traits. The isolates were categorized into two groups. Group I isolates were unable to produce germ tubes and chlamydospores, and to agglutinate commercial latex particles coated with a mAb highly specific for C. dubliniensis. Group II isolates grew as pink and white colonies on CHROMagar Candida and ChromID Candida, respectively. Carbohydrate assimilation profiles obtained with API/ID32C together with PCR amplification with specific primers and DNA sequencing allowed reliable identification of the nine unusual clinical isolates as C. dubliniensis.
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Affiliation(s)
- Olatz Albaina
- Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, University of the Basque Country UPV/EHU, Bilbao, Spain
| | - Ismail H Sahand
- Department of Microbiology, Faculty of Medicine, Hawler Medical University, Hawler, Kurdistan, Iraq
- Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, University of the Basque Country UPV/EHU, Bilbao, Spain
| | - María I Brusca
- Departamento de Microbiología y Parasitología, Facultad de Odontología, Universidad de Buenos Aires, Argentina
| | - Derek J Sullivan
- Microbiology Research Laboratory, Division of Oral Biosciences, School of Dental Science and Dublin Dental University Hospital, Trinity College, Dublin 2, Ireland
| | - Iñigo Fernández de Larrinoa
- Departamento de Química Aplicada, Facultad de Ciencias Químicas, University of the Basque Country UPV/EHU, Donostia-San Sebastián, Spain
| | - María D Moragues
- Departamento de Enfermería I, Escuela Universitaria de Enfermería, University of the Basque Country UPV/EHU, Bilbao, Spain
- Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, University of the Basque Country UPV/EHU, Bilbao, Spain
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Ieda S, Moriyama M, Takashita T, Maehara T, Imabayashi Y, Shinozaki S, Tanaka A, Hayashida JN, Furukawa S, Ohta M, Yamashita Y, Nakamura S. Molecular analysis of fungal populations in patients with oral candidiasis using internal transcribed spacer region. PLoS One 2014; 9:e101156. [PMID: 24979710 PMCID: PMC4076276 DOI: 10.1371/journal.pone.0101156] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Accepted: 06/03/2014] [Indexed: 11/25/2022] Open
Abstract
Oral candidiasis is closely associated with changes in the oral fungal flora and is caused primarily by Candida albicans. Conventional methods of fungal culture are time-consuming and not always conclusive. However, molecular genetic analysis of internal transcribed spacer (ITS) regions of fungal rRNA is rapid, reproducible and simple to perform. In this study we examined the fungal flora in patients with oral candidiasis and investigated changes in the flora after antifungal treatment using length heterogeneity-polymerization chain reaction (LH-PCR) analysis of ITS regions. Fifty-two patients with pseudomembranous oral candidiasis (POC) and 30 healthy controls were included in the study. Fungal DNA from oral rinse was examined for fungal species diversity by LH-PCR. Fungal populations were quantified by real-time PCR and previously-unidentified signals were confirmed by nucleotide sequencing. Relationships between the oral fungal flora and treatment-resistant factors were also examined. POC patients showed significantly more fungal species and a greater density of fungi than control individuals. Sixteen fungi were newly identified. The fungal populations from both groups were composed predominantly of C. albicans, though the ratio of C. dubliniensis was significantly higher in POC patients than in controls. The diversity and density of fungi were significantly reduced after treatment. Furthermore, fungal diversity and the proportion of C. dubliniensis were positively correlated with treatment duration. These results suggest that C. dubliniensis and high fungal flora diversity might be involved in the pathogenesis of oral candidiasis. We therefore conclude that LH-PCR is a useful technique for diagnosing and assessing the severity of oral candidal infection.
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Affiliation(s)
- Shinsuke Ieda
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Masafumi Moriyama
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
- * E-mail:
| | - Toru Takashita
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Takashi Maehara
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yumi Imabayashi
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Shoichi Shinozaki
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Akihiko Tanaka
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Jun-Nosuke Hayashida
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Sachiko Furukawa
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Miho Ohta
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yoshihisa Yamashita
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Seiji Nakamura
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
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Identification, typing, antifungal resistance profile, and biofilm formation of Candida albicans isolates from Lebanese hospital patients. BIOMED RESEARCH INTERNATIONAL 2014; 2014:931372. [PMID: 24982915 PMCID: PMC4058652 DOI: 10.1155/2014/931372] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/28/2014] [Accepted: 05/01/2014] [Indexed: 01/08/2023]
Abstract
As leading opportunistic fungal pathogens identification and subtyping of Candida species are crucial in recognizing outbreaks of infection, recognizing particularly virulent strains, and detecting the emergence of drug resistant strains. In this study our objective was to compare identification of Candida albicans by the hospitals through the use of conventional versus identification based on the ITS (Internal Transcribed Spacer) and to assess biofilm forming capabilities, drug resistance patterns and correlate these with MLST typing. ITS typing revealed a 21.2% hospital misidentification rate. Multidrug resistance to three drugs out of four tested was detected within 25% of the isolates raising concerns about the followed treatment regimens. Drug resistant strains as well as biofilm formers were phylogenetically related, with some isolates with significant biofilm forming capabilities being correlated to those that were multidrug resistant. Such isolates were grouped closely together in a neighbor-joining tree generated by MLST typing indicating phylogenetic relatedness, microevolution, or recurrent infection. In conclusion, this pilot study gives much needed insight concerning C. albicans isolates circulating in Lebanese hospitals and is the first study of its kind correlating biofilm formation, antifungal resistance, and evolutionary relatedness.
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Bellanger AP, Grenouillet F, François N, Skana F, Millon L. Inhibitory effect of chromogenic culture media on the growth of Rhodotorula: relevance to the diagnosis of Rhodotorulaspp. infections. APMIS 2013; 121:1109-17. [DOI: 10.1111/apm.12090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 12/27/2012] [Accepted: 01/09/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Anne-Pauline Bellanger
- CNRS 6249/UMR Chrono-environnement; Univ Franche Comte; Besançon France
- Parasitology-Mycology Department; University Hospital of Besançon; Besançon France
- Clinical Investigation Center (Inserm CIT 808); University Hospital of Besançon; Besançon France
| | - Frédéric Grenouillet
- CNRS 6249/UMR Chrono-environnement; Univ Franche Comte; Besançon France
- Parasitology-Mycology Department; University Hospital of Besançon; Besançon France
| | - Nadine François
- Parasitology-Mycology Department; University Hospital of Lille; Lille France
| | - Florence Skana
- Parasitology-Mycology Department; University Hospital of Besançon; Besançon France
| | - Laurence Millon
- CNRS 6249/UMR Chrono-environnement; Univ Franche Comte; Besançon France
- Parasitology-Mycology Department; University Hospital of Besançon; Besançon France
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20
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Eguia A, Marcos-Arias C, Eraso E, Quindós G, Aguirre JM. Presencia de Candida en la estomatitis aftosa recidivante. Rev Iberoam Micol 2013; 30:271-2. [DOI: 10.1016/j.riam.2013.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 03/20/2013] [Indexed: 10/26/2022] Open
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Leibovitz E, Livshiz-Riven I, Borer A, Taraboulos-Klein T, Zamir O, Shany E, Melamed R, Rimon OF, Bradenstein R, Chodick G, Golan A. A prospective study of the patterns and dynamics of colonization with Candida spp. in very low birth weight neonates. ACTA ACUST UNITED AC 2013; 45:842-8. [PMID: 23919503 DOI: 10.3109/00365548.2013.814150] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Knowledge of fungal colonization patterns in very low birth weight infants (VLBWI) admitted to the neonatal intensive care unit (NICU) is essential in understanding the process of fungal infections in neonates. We analyzed prospectively, during 2009-2010, the patterns and dynamics of fungal colonization in VLBWI, including timing, colonization sites, and species involved. METHODS Weekly skin, oropharynx, and rectum/stool surveillance fungal cultures were collected from admission until discharge in VLBWI in the NICU. None received antifungal prophylaxis. RESULTS Overall, 118 VLBWI provided 1723 samples; 34 (29%) had 104 positive samples at least once during the first 10 hospitalization weeks. Thirty-nine (33%) weighed < 1000 g; 68 were delivered by cesarean section. Candida albicans (57/104, 55%) and Candida parapsilosis (26/104, 25%) were the main fungi isolated. Eight (24%) VLBWI were colonized during the first week and 23 (68%) during the second week. No differences in colonization were recorded between cesarean section and vaginally delivered VLBWI. The colonization risk at least once during the first 10 weeks was 23% for skin, 14% for oropharynx, 27% for rectum/stool, and 38% for any anatomic site sampled. Persistent colonization was recorded in 5/34 (15%), while transient colonization was found in 14/34 (41%) VLBWI; 16/34 (47%) were discharged or died colonized with Candida spp. Candidemia was diagnosed in 4 (3%) VLBWI and previous/simultaneous colonization was found in 3/4. CONCLUSIONS The cumulative risk of colonization, at any sampled site and at least once during follow-up, was high. Initial colonization occurred most often during the first 2 weeks of life. Colonization dynamics were characterized by various persistence, disappearance, and recolonization patterns. Candidemia was rare.
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Affiliation(s)
- Eugene Leibovitz
- From the Pediatric Infectious Disease Unit, Soroka University Medical Center
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Eddouzi J, Lohberger A, Vogne C, Manai M, Sanglard D. Identification and antifungal susceptibility of a large collection of yeast strains isolated in Tunisian hospitals. Med Mycol 2013; 51:737-46. [PMID: 23768242 DOI: 10.3109/13693786.2013.800239] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) was used as a rapid method to identify yeasts isolated from patients in Tunisian hospitals. When identification could not be exstablished with this procedure, sequencing of the internal transcribed spacer with 5.8S ribosomal DNA (rDNA) (ITS1-5.8S-ITS2) and D1/D2 domain of large-subunit (LSU rDNA) were employed as a molecular approach for species differentiation. Candida albicans was the dominant species (43.37% of all cases), followed by C. glabrata (16.55%), C. parapsilosis (13.23%), C. tropicalis (11.34%), C. dubliniensis (4.96%), and other species more rarely encountered in human diseases such as C. krusei, C. metapsilosis, C. lusitaniae, C. kefyr, C. palmioleophila, C. guilliermondii, C. intermedia, C. orthopsilosis, and C. utilis. In addition, other yeast species were obtained including Saccharomyces cerevisiae, Debaryomyces hansenii (anamorph known as C. famata), Hanseniaspora opuntiae, Kodamaea ohmeri, Pichia caribbica (anamorph known as C. fermentati), Trichosporon spp. and finally a novel yeast species, C. tunisiensis. The in vitro antifungal activities of fluconazole and voriconazole were determined by the agar disk diffusion test and Etest, while the susceptibility to additional antifungal agents was determined with the Sensititre YeastOne system. Our results showed low incidence of azole resistance in C. albicans (0.54%), C. tropicalis (2.08%) and C. glabrata (4.28%). In addition, caspofungin was active against most isolates of the collection with the exception of two K. ohmeri isolates. This is the first report to describe caspofungin resistant isolates of this yeast.
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Affiliation(s)
- Jamel Eddouzi
- * Institute of Microbiology, University Hospital Lausanne and University Hospital Center , Lausanne , Switzerland
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Oral candidiasis: Species identification and their antifungal susceptibility pattern in cancer patients receiving radiation therapy. JOURNAL OF RADIOTHERAPY IN PRACTICE 2013. [DOI: 10.1017/s1460396911000446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractIntroduction:Radiotherapy-induced hyposalivation encourages oralCandidacolonization that often leads to oral/pharyngeal candidiasis. The objective of this study was to identify theCandidaspecies in lesions of oropharyngeal candidiasis in patients undergoing radiotherapy for head and neck cancers and to find out antifungal susceptibility pattern.Material and methods:Swabs were collected from 60 patients who developed lesions suggestive of oral candidiasis at the end of 1st week of radiation therapy. Antifungal susceptibility of each of the isolated species was done using disc diffusion method following CLSI guidelines.Results: Candidawas isolated in 13 cases.C.albicans(7) was the most predominant species; a small number of other species have also been identified. Few strains (3) ofCandidashowed variable resistance to the commonly used antifungal drugs.Discussion:The colonization ofCandidamay lead to development of infections with drug-resistant strains, and hence the patients receiving radiation for head and neck cancers should undergo microbiological study for oral candidiasis.
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Saghrouni F, Ben Abdeljelil J, Nouri S, Gheith S, Fathallah A, Sboui H, Ben Said M. [Double fungemia. Report of four Tunisian cases]. J Mycol Med 2013; 22:192-6. [PMID: 23518024 DOI: 10.1016/j.mycmed.2012.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 02/01/2012] [Accepted: 02/10/2012] [Indexed: 11/28/2022]
Abstract
UNLABELLED Fungemia is classically caused by a single species and the detection of more than one species in blood samples is uncommon. We report four cases of mixed fungemia (MF) diagnosed in the parasitology-mycology laboratory of Farhat-Hached hospital in Sousse, Tunisia. The MF episodes occurred in two neonates and two adults suffering from acute myeloid leukemia. Two fungal species were detected concomitantly within the same blood culture in all cases. Species combination was detected by the subculture of the blood culture on Candida ID(®) chromogenic medium in three cases and on Sabouraud agar in one case. Predisposing factors were: indwelling catheters (4/4), broad-spectrum antibiotics (3/4), neutropenia (2/4), exclusive parenteral nutrition (2/4) and Candida colonization (1/4). Patients presented febrile sepsis with no response to broad-spectrum antibiotic therapy in all cases. Outcome under antifungal treatment was favorable in two cases and the two other patients died. CONCLUSION MF appears similar to the more common monomicrobial fungemia. The use of chromogenic media in routine can improve the detection of MF episodes allowing appropriate antifungal therapy.
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Affiliation(s)
- F Saghrouni
- Laboratoire de parasitologie-mycologie, hôpital Farhat-Hached, Sousse, Tunisia.
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Frickmann H, Lakner A, Essig A, Poppert S. Rapid identification of yeast by fluorescencein situhybridisation from broth and blood cultures. Mycoses 2012; 55:521-31. [DOI: 10.1111/j.1439-0507.2012.02214.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Quindós G, Eraso E, López-Soria LM, Ezpeleta G. [Invasive fungal disease: conventional or molecular mycological diagnosis?]. Enferm Infecc Microbiol Clin 2011; 30:560-71. [PMID: 22206948 DOI: 10.1016/j.eimc.2011.10.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 10/18/2011] [Accepted: 10/18/2011] [Indexed: 12/31/2022]
Abstract
Diagnosis of invasive mycoses is a difficult challenge due to the limitations and low sensitivity of traditional microbiology methods which lead to diagnostic and therapeutic delays. The aim of this review is to summarise the state of the art of the molecular diagnosis of invasive fungal disease and to clarify its current role in the clinical practice. Conventional microbiological methods could be complemented with molecular methods in the rapid and definitive identification of fungal isolates. Biomarkers (β-glucan, galactomannan) are very useful in immunocompromised patients and have been included as probable invasive mycoses by the EORTC/MSG. Nucleic acid detection is currently used as a complementary tool for diagnosis. However, PCR can be very useful in mould invasive mycoses. Finally, the combined detection using biomarkers can improve the diagnosis. However, their applicability in the microbiology laboratory is not so easy and further studies are required for the appropriate evaluation of its clinical usefulness.
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Affiliation(s)
- Guillermo Quindós
- Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco, Bilbao, España.
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Lakner A, Essig A, Frickmann H, Poppert S. Evaluation of fluorescence in situ hybridisation (FISH) for the identification of Candida albicans in comparison with three phenotypic methods. Mycoses 2011; 55:e114-23. [PMID: 22126597 DOI: 10.1111/j.1439-0507.2011.02154.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Severe Candida infections are increasing and are associated with considerable morbidity and mortality. Rapid and accurate differentiation of Candida albicans from non-C. albicans species is essential for therapeutic decisions. We therefore developed a fluorescence in situ hybridisation (FISH) assay comprising previously described probes and a newly designed specific C. albicans probe/competitor probe combination. The FISH probes were first evaluated using 99 selected fungal strains covering 31 species, and a specificity between 96% and 100% and a sensitivity of 100%. The FISH assay was then applied to 110 clinical isolates in parallel with API32C, the chromogenic Candida ID agar, and determination of filamentous colony morphology. All tests produced highly reliable results. However, the Candida ID agar misidentified Candida dubliniensis as C. albicans. Determination of filamentous colony morphology allowed 100% reliable identification of C. albicans, but took 48 h. FISH allowed identification of clinical C. albicans isolates within 3 h with a sensitivity and specificity of 100%. FISH was additionally applied to 48 blood cultures showing yeasts in the Gram stain and correctly identified all 33 cases of C. albicans.
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Affiliation(s)
- Anna Lakner
- Institute of Medical Microbiology and Hygiene, University of Ulm, Germany
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Marcos-Arias C, Eraso E, Madariaga L, Quindós G. In vitro activities of natural products against oral Candida isolates from denture wearers. Altern Ther Health Med 2011; 11:119. [PMID: 22118215 PMCID: PMC3258290 DOI: 10.1186/1472-6882-11-119] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 11/26/2011] [Indexed: 12/21/2022]
Abstract
Background Candida-associated denture stomatitis is a frequent infectious disease. Treatment of this oral condition is difficult because failures and recurrences are common. The aim of this study was to test the in vitro antifungal activity of pure constituents of essentials oils. Methods Eight terpenic derivatives (carvacrol, farnesol, geraniol, linalool, menthol, menthone, terpinen-4-ol, and α-terpineol), a phenylpropanoid (eugenol), a phenethyl alcohol (tyrosol) and fluconazole were evaluated against 38 Candida isolated from denture-wearers and 10 collection Candida strains by the CLSI M27-A3 broth microdilution method. Results Almost all the tested compounds showed antifungal activity with MIC ranges of 0.03-0.25% for eugenol and linalool, 0.03-0.12% for geraniol, 0.06-0.5% for menthol, α-terpineol and terpinen-4-ol, 0.03-0.5% for carvacrol, and 0.06-4% for menthone. These compounds, with the exception of farnesol, menthone and tyrosol, showed important in vitro activities against the fluconazole-resistant and susceptible-dose dependent Candida isolates. Conclusions Carvacrol, eugenol, geraniol, linalool and terpinen-4-ol were very active in vitro against oral Candida isolates. Their fungistatic and fungicidal activities might convert them into promising alternatives for the topic treatment of oral candidiasis and denture stomatitis.
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Villar-Vidal M, Marcos-Arias C, Eraso E, Quindós G. Variation in biofilm formation among blood and oral isolates of Candida albicans and Candida dubliniensis. Enferm Infecc Microbiol Clin 2011; 29:660-5. [DOI: 10.1016/j.eimc.2011.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 06/23/2011] [Accepted: 06/28/2011] [Indexed: 12/01/2022]
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In Vitro Activities of New Triazole Antifungal Agents, Posaconazole and Voriconazole, Against Oral Candida Isolates from Patients Suffering from Denture Stomatitis. Mycopathologia 2011; 173:35-46. [DOI: 10.1007/s11046-011-9460-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 08/03/2011] [Indexed: 11/27/2022]
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31
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Miranda-Zapico I, Eraso E, Hernandez-Almaraz JL, Lopez-Soria LM, Carrillo-Munoz AJ, Hernandez-Molina JM, Quindos G. Prevalence and antifungal susceptibility patterns of new cryptic species inside the species complexes Candida parapsilosis and Candida glabrata among blood isolates from a Spanish tertiary hospital. J Antimicrob Chemother 2011; 66:2315-22. [DOI: 10.1093/jac/dkr298] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Quindós G. Candidiasis, aspergilosis y otras micosis invasoras en receptores de trasplantes de órgano sólido. Rev Iberoam Micol 2011; 28:110-9. [DOI: 10.1016/j.riam.2011.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Saccharomyces cerevisiae vaginitis: microbiology and in vitro antifungal susceptibility. Mycopathologia 2011; 172:201-5. [PMID: 21424705 DOI: 10.1007/s11046-011-9414-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Accepted: 03/08/2011] [Indexed: 11/27/2022]
Abstract
Genitourinary infections by Saccharomyces cerevisiae are rare. Here, we describe eight S. cerevisiae vulvovaginitis episodes where molecular (Affirm VPIII) and conventional microbiological methods (culture and carbohydrate assimilation) have proven to be inadequate for diagnostic purposes. DNA sequencing allowed the correct identification of the pathogen. All isolates were susceptible to most antifungal agents, with two of them also found to be susceptible-dose-dependent to itraconazole.
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Guzel AB, Ilkit M, Burgut R, Urunsak IF, Ozgunen FT. An evaluation of risk factors in pregnant women with Candida vaginitis and the diagnostic value of simultaneous vaginal and rectal sampling. Mycopathologia 2011; 172:25-36. [PMID: 21293929 DOI: 10.1007/s11046-011-9392-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Accepted: 01/17/2011] [Indexed: 01/07/2023]
Abstract
In this study, we investigated the epidemiological characteristics of VVC among pregnant women. We conducted a prospective survey among 372 pregnant women to investigate the prevalence, clinical forms, etiological agents, and predisposing factors of VVC. In addition, we determined the relationship between vaginal and rectal flora by simultaneously obtaining one high vaginal swab and one rectal swab from each patient using sterile cotton-tipped swabs. Furthermore, we compared the recovery and identification performances of chromID Candida agar to Sabouraud dextrose agar with gentamicin and chloramphenicol. Clinically and mycologically confirmed cases of VVC were detected in 139 (37.4%) and vaginal colonization described in 42 (11.3%) of 372 pregnant women. Rectal cultures were also positive in 98 of the 139 (70.5%) VVC cases. Candida albicans and C. glabrata were identified in vaginal samples in 58.0 versus 19.0% and from rectal samples in 49.0 versus 13.5%, respectively. Increases in gestational week and gravidae were identified to be statistically significant in patients with acute VVC (AVVC) and symptomatic recurrent VVC (RVVC), and asymptomatic RVVC (P = 0.04 and P = 0.03, respectively). In the laboratory diagnosis of VVC, specifically tailored chromogenic media are reliable tools for both the recovery and rapid identification of common Candida spp., particularly C. albicans, as well as for the detection of polyfungal populations in vaginal samples (P > 0.05). In addition, rectal colonization is a common finding in cases of AVVC and symptomatic-RVVC cases and corresponds well with the presence of the same yeast species in the vagina.
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Affiliation(s)
- Ahmet Barış Guzel
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Cukurova, Adana, Turkey
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35
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Guzel AB, Ilkit M, Akar T, Burgut R, Demir SC. Evaluation of risk factors in patients with vulvovaginal candidiasis and the value of chromID Candida agar versus CHROMagar Candida for recovery and presumptive identification of vaginal yeast species. Med Mycol 2011; 49:16-25. [DOI: 10.3109/13693786.2010.497972] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Pasligh J, Radecke C, Fleischhacker M, Ruhnke M. Comparison of phenotypic methods for the identification of Candida dubliniensis. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2010; 43:147-54. [PMID: 20457432 DOI: 10.1016/s1684-1182(10)60023-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 10/08/2008] [Accepted: 11/07/2008] [Indexed: 10/19/2022]
Abstract
BACKGROUND/PURPOSE Mixed infections caused by different Candida species are the rule rather than the exception. The discrimination between the two closely related species Candida albicans and Candida dubliniensis is not trivial. Therefore, there is a need for fast, reliable, and inexpensive methods with high specificity for the identification and differentiation of these two Candida species, which are frequently detected in the oral cavities of patients with a human immunodeficiency virus infection. METHODS We applied several phenotypic identification methods (growth on Rice-agar, Bird-seed agar, CHROMagar Candida, API ID 32C; growth at 42 degrees C and 45 degrees C) and compared them with genotyping by arbitrarily primed-polymerase chain reaction. RESULTS A sensitivity of 44% for the identification of C. dubliniensis was achieved for growth on Rice-agar, 97% for discrimination on Bird-seed agar, 95% with the assimilation profile index API ID 32C, and 97% when grown at 45 degrees C. We found two API codes not described for C. dubliniensis so far. Additionally, 88% of our C. dubliniensis isolates assimilated palatinose, in contrast to the 1% described in the API reference manual. CONCLUSION According to our results, cultivation of Candida isolates on Bird-seed agar after screening on CHROMagar Candida is a very sensitive, simple, and cost-effective method for discriminating C. dubliniensis from C. albicans in routine practice.
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Affiliation(s)
- Julia Pasligh
- Division of Oncology, Department of Medicine, Charité Universitätsmedizin Berlin, Charité Campus Mitte, Berlin, Germany
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Abstract
Candida africana is a recently described opportunistic yeast pathogen that has been linked to vaginal candidiasis. This yeast was first described, in 1995, as atypical chlamydospore-negative Candida albicans strain, and subsequently proposed as a new Candida species on the basis of morphological, biochemical and physiological characteristics clearly different from those of typical C. albicans isolates. Phylogenetic studies based on the comparison of ribosomal DNA sequences demonstrated that C. africana and C. albicans isolates are too closely related to draw any conclusions regarding the status of a new species. Therefore, on the basis of these studies, some authors considered C. africana as a biovar of C. albicans even if genetic differences may be found if additional regions of genomic DNA are sequenced. The taxonomic situation of C. africana and its phylogenetic relationship with other Candida species is still controversial and remains, at present, a matter of debate. Our goal is to review the current knowledge about C. africana and highlight the development of rapid and accurate tests for its discrimination from C. albicans, Candida dubliniensis and Candida stellatoidea. Furthermore, through the analysis of literature data, we have found that C. africana has a worldwide distribution and a considerable number of features making its study particularly interesting.
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Affiliation(s)
- Orazio Romeo
- Department of Life Sciences Marcello Malpighi, Section of Microbiological, Genetic and Molecular Sciences, University of Messina, Messina, Italy
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38
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Loreto ES, Scheid LA, Nogueira CW, Zeni G, Santurio JM, Alves SH. Candida dubliniensis: Epidemiology and Phenotypic Methods for Identification. Mycopathologia 2010; 169:431-43. [PMID: 20490751 DOI: 10.1007/s11046-010-9286-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Accepted: 02/04/2010] [Indexed: 11/26/2022]
Affiliation(s)
- Erico Silva Loreto
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
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Marcos-Arias C, Eraso E, Madariaga L, Aguirre JM, Quindós G. Phospholipase and proteinase activities of Candida isolates from denture wearers. Mycoses 2009; 54:e10-6. [PMID: 20028461 DOI: 10.1111/j.1439-0507.2009.01812.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The aim of the present study was to characterise phospholipase and proteinase activities of oral Candida isolates from 100 denture wearers and to study the relationship of these activities with denture stomatitis. Of 100 patients studied, 44 suffered from denture stomatitis. Specimens were collected by swabbing the denture and underlying mucosa. Isolates were previously identified by conventional mycological and genotypic methods. The phospholipase and proteinase activities were evaluated by agar plate methods. A total of 152 isolates were recovered from denture and underlying mucosa, including 101 Candida albicans, 18 Candida tropicalis, 14 Candida glabrata, 11 Candida guilliermondii, four Candida parapsilosis, two Saccharomyces cerevisiae and one isolate each of Candida dubliniensis and Candida krusei. Most C. albicans (97%) showed phospholipase activity; furthermore, the unique C. dubliniensis isolate showed a moderate phospholipase activity. The isolation of C. albicans (chi-square test, P = 0.0016) and phospholipase production by Candida spp. (chi-square test, P = 0.0213) was found to be significantly associated with denture stomatitis. Proteinase production was observed in <30% of isolates, and it was not related to the presence of denture stomatitis (P = 0.7675). Candida albicans isolates may produce both virulence factors, although the proteinase production was only observed in <30% of the isolates. Phospholipase production was exclusive of C. albicans and C. dubliniensis.
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Affiliation(s)
- Cristina Marcos-Arias
- Laboratorio de Micología Médica, Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Bilbao, Spain
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Sahand IH, Maza JL, Eraso E, Montejo M, Moragues MD, Aguirre JM, Quindós G, Pontón J. Evaluation of CHROM-Pal medium for the isolation and direct identification of Candida dubliniensis in primary cultures from the oral cavity. J Med Microbiol 2009; 58:1437-1442. [PMID: 19608690 DOI: 10.1099/jmm.0.011320-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Candida albicans is the species most frequently isolated from oral specimens, but the recovery of other Candida species such as Candida dubliniensis is increasing. Differentiation of C. dubliniensis from C. albicans requires special tests and both species are misidentified in some studies. CHROM-Pal (CH-P) is a novel chromogenic medium used in our laboratory for differentiation between C. albicans and C. dubliniensis on the basis of colony colour and morphology, and chlamydospore production. The performance of CH-P and CHROMagar Candida (CAC) was compared for primary isolation and presumptive identification of yeasts from oral specimens from human immunodeficiency virus (HIV)-infected and uninfected individuals. The identification of Candida species on both media was compared with two reference identification methods (API ID 32 C and multiplex PCR). A total of 137/205 oral swabs (66.8 %) plated onto CH-P and CAC media were positive by culture and resulted in the growth of 171 isolates of Candida species on CH-P, whilst only 159 isolates grew on CAC. C. albicans was the most frequently isolated species in both groups of patients, followed by Candida parapsilosis in the HIV-negative group, and by C. dubliniensis in the HIV-infected group. The other Candida species isolated were Candida guilliermondii, Candida glabrata, Candida krusei, Candida tropicalis, Candida famata, Candida rugosa, Candida kefyr, Candida pelliculosa and Candida pulcherrima. The sensitivity and specificity for identifying C. albicans, C. krusei, C. tropicalis and C. dubliniensis on CH-P were over 98.5 %, always equal to or higher than those obtained when CAC was used. CH-P is a simple reliable medium for primary isolation and presumptive identification of yeast isolates from oral samples. The ability of CH-P to discriminate between C. dubliniensis and C. albicans was significantly higher (P <0.05) than that of CAC.
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Affiliation(s)
- Ismail H Sahand
- Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco-Euskal Herriko Unibersitatea, Apartado 699, 48080 Bilbao, Vizcaya, Spain
| | - José L Maza
- Departamento de Estomatología, Facultad de Medicina y Odontología, Universidad del País Vasco, Barrio Sarriena s/n, 48940 Leioa, Vizcaya, Spain
| | - Elena Eraso
- Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco-Euskal Herriko Unibersitatea, Apartado 699, 48080 Bilbao, Vizcaya, Spain
| | - Miguel Montejo
- Unidad de Enfermedades infecciosas, Hospital de Cruces, Universidad del País Vasco, Baracaldo, Vizcaya, Spain
| | - María D Moragues
- Departamento de Enfermería 1, Universidad del País Vasco, Barrio Sarriena s/n, 48940 Leioa, Vizcaya, Spain
| | - José M Aguirre
- Departamento de Estomatología, Facultad de Medicina y Odontología, Universidad del País Vasco, Barrio Sarriena s/n, 48940 Leioa, Vizcaya, Spain
| | - Guillermo Quindós
- Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco-Euskal Herriko Unibersitatea, Apartado 699, 48080 Bilbao, Vizcaya, Spain
| | - José Pontón
- Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco-Euskal Herriko Unibersitatea, Apartado 699, 48080 Bilbao, Vizcaya, Spain
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41
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Marcos-Arias C, Vicente JL, Sahand IH, Eguia A, De-Juan A, Madariaga L, Aguirre JM, Eraso E, Quindós G. Isolation of Candida dubliniensis in denture stomatitis. Arch Oral Biol 2008; 54:127-31. [PMID: 18950745 DOI: 10.1016/j.archoralbio.2008.09.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2008] [Revised: 07/23/2008] [Accepted: 09/14/2008] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To describe the isolation of Candida dubliniensis from a patient with denture stomatitis and to compare with the presence of yeasts in the oral cavities of denture wearers. DESIGN One hundred and fifty-two Candida isolates were recovered through oral swabs from denture as well as the underlying mucosa from 100 patients wearing denture. For detection and identification of fungal isolates, standard phenotypic and genotypic methods were used. RESULTS Forty-five of 100 denture wearers suffered from denture stomatitis. Seventy-three Candida isolates were recovered from 38 denture wearers without denture stomatitis. In this group, Candida albicans was the predominant species (58.9%), followed by Candida tropicalis (15.1%), Candida guilliermondii (13.7%), Candida glabrata (9.6%), and Candida parapsilosis (2.7%). Seventy-nine isolates were yielded from 40 patients suffering from denture stomatitis. C. albicans was also the most frequently isolated species (58 isolates, 73.4%), followed by C. glabrata and C. tropicalis (7 isolates each, 8.9%), and Saccharomyces cerevisiae (2 isolates, 2.5%). One isolate was yielded of the following species: Candida famata, Candida krusei, C. parapsilosis and C. guilliermondii. Moreover 1 isolate was phenotypic and genotypic identified as C. dubliniensis genotype 1. CONCLUSIONS C. albicans is the predominant fungal species isolated from denture wearers. C. dubliniensis could be isolated from adults with denture stomatitis.
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Affiliation(s)
- Cristina Marcos-Arias
- Laboratorio de Micología Médica, Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco, Apartado 699, E-48080 Bilbao, Spain
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Boyanton BL, Luna RA, Fasciano LR, Menne KG, Versalovic J. DNA pyrosequencing-based identification of pathogenic Candida species by using the internal transcribed spacer 2 region. Arch Pathol Lab Med 2008; 132:667-74. [PMID: 18384218 DOI: 10.5858/2008-132-667-dpiopc] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2007] [Indexed: 11/06/2022]
Abstract
CONTEXT The incidence of infections due to diverse Candida species is increasing, with correspondingly different antifungal susceptibility patterns. Routine yeast identification methods cause significant delays in appropriate patient management. OBJECTIVE A DNA pyrosequencing strategy was evaluated for identification of pathogenic Candida species associated with human infections. DESIGN Clinical (n = 51) and commercial (n = 9) Candida isolates were identified in a blinded, parallel study consisting of routine fungal cultures and biochemical analyses in comparison with DNA pyrosequencing. RESULTS DNA pyrosequencing yielded species-level identification of all 60 Candida isolates, and sequencing interpretations agreed in all cases with results of biochemical and morphologic testing. Different Candida species were identified, such as C. albicans, C. dubliniensis, C. glabrata, C. guilliermondii, C. krusei, C. lusitaniae, C. parapsilosis, and C. tropicalis. Automated and manual approaches to DNA sequence interpretation, each coupled with the Identifire identification software, demonstrated 100% agreement with respect to Candida species identification. Twenty-one isolates yielded intraspecies DNA sequence differences (90%-98% nucleic acid sequence identity) by automated interpretation. Sequence differences resulted from single-nucleotide polymorphisms or single-base additions/deletions, in addition to interpretative challenges in homopolymeric tracts. CONCLUSION DNA pyrosequencing coupled with automated DNA sequence alignment provides a practical approach for accurate and timely identification of Candida pathogens. Relatively rapid and facile genotypic studies by DNA pyrosequencing matched the effectiveness of extensive biochemical/morphologic studies for yeast identification.
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Affiliation(s)
- Bobby L Boyanton
- Department of Pathology, Baylor College of Medicine, Houston, USA.
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Abstract
Since 1990, a wide range of chromogenic culture media has been made commercially available providing useful tools for diagnostic clinical microbiology. By the inclusion of chromogenic enzyme substrates targeting microbial enzymes, such media are able to target pathogens with high specificity. Examples of target pathogens include Staphylococcus aureus, Streptococcus agalactiae, Salmonella spp. and Candida spp. The inclusion of multiple chromogenic substrates into culture media facilitates the differentiation of polymicrobial cultures, thus allowing for the development of improved media for diagnosis of urinary tract infections and media for the enhanced discrimination of yeasts. The purpose of this review is to provide some insight into how such media work and appraise their utility in routine clinical diagnostics, in comparison with conventional media.
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Affiliation(s)
- J D Perry
- Microbiology Department, Freeman Hospital, Newcastle upon Tyne, UK.
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44
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Blanco MT, Sacristán B, Beteta A, Fernández-Calderón MC, Hurtado C, Pérez-Giraldo C, Gómez-García AC. Cellular surface hydrophobicity as an additional phenotypic criterion applied to differentiate strains of Candida albicans and Candida dubliniensis. Diagn Microbiol Infect Dis 2008; 60:129-31. [PMID: 17900846 DOI: 10.1016/j.diagmicrobio.2007.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Revised: 07/19/2007] [Accepted: 07/23/2007] [Indexed: 10/22/2022]
Abstract
We have evaluated the cellular surface hydrophobicity (CSH) determination as an additional criterion to differentiate Candida albicans from Candida dubliniensis. Our results show that C. albicans when grown at 37 degrees C in Sabouraud is always hydrophilic, and C. dubliniensis presents high CSH levels.
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Affiliation(s)
- María-Teresa Blanco
- Area of Microbiology, Faculty of Medicine, Department of Biomedical Sciences, University of Extremadura, 06071 Badajoz, Spain.
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Alonso-Vargas R, Elorduy L, Eraso E, Cano FJ, Guarro J, Pontón J, Quindós G. Isolation ofCandida africana, probable atypical strains ofCandida albicans, from a patient with vaginitis. Med Mycol 2008; 46:167-70. [PMID: 17885960 DOI: 10.1080/13693780701633101] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Identification of unusual fungal isolates is a major challenge for the clinical laboratory. This report describes the isolation of Candida africana from a patient with vaginitis. This is a doubtful species which possibly represents atypical strains of Candida albicans. Candida africana can be separated morphologically and physiologically from C. albicans but not genetically. The analysis of 26S rRNA gene showed near 100% homology between C. africana and C. albicans.
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Affiliation(s)
- Rocío Alonso-Vargas
- Departamento de Inmunologa, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco, Vizcaya, Bilbao, Spain
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CHRYSSANTHOU E, FERNANDEZ V, PETRINI B. Performance of commercial latex agglutination tests for the differentiation ofCandida dubliniensisandCandida albicansin routine diagnostics. APMIS 2007; 115:1281-4. [DOI: 10.1111/j.1600-0643.2007.00801.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Current awareness on yeast. Yeast 2007. [DOI: 10.1002/yea.1326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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