scholarly journals Candida albicans isolated from denture-related stomatitis in elderly patients: Antifungal susceptibility and production of virulence attributes

2020 ◽  
Vol 1 ◽  
Author(s):  
Lourimar Viana Nascimento Franco de Sousa ◽  
Carlos Davi de Oliveira Maia ◽  
Isadora Sousa Carvalho ◽  
Juliano Meireles Prata ◽  
Larissa Carla Rodrigues Arcanjo ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Elderly Patients ◽  
Amphotericin B ◽  
Antifungal Susceptibility ◽  
Burning Sensation ◽  
Aspartic Protease ◽  
Elderly Individuals ◽  
Polystyrene Surface ◽  
Low Prevalence ◽  
Effective Drugs

AbstractDenture-related stomatitis caused by Candida spp. affects elderly individuals using partial/total prosthesis, provoking several discomforts including burning sensation and altered taste. Herein, we have studied 52 denture-wearing individuals (>60 years-old), attended at the dentistry clinic of UNIVALE, aiming to isolate Candida spp. directly from the stomatitis lesions and to evaluate their potential to produce virulence attributes. A low prevalence of denture-related stomatitis was reported in these patients (4/52; 7.7%). Candida albicans was isolated in the 4 selected patients, with the ability to form biofilm over a polystyrene surface and to produce aspartic protease, esterase and hemolysin. However, neither phospholipase nor caseinase activities were detected. Planktonic-growing yeasts were susceptible to amphotericin B and caspofungin, while the susceptibility to azoles (fluconazol, itraconazole and voriconazole) varied depending on either the isolate or antifungal. Relevantly, biofilm-forming C. albicans cells exhibited resistance to all studied antifungals. So, new effective drugs against resistant C. albicans isolates causing denture-related stomatitis are urgently required.

scholarly journals Flow Cytometry Antifungal Susceptibility Testing of Pathogenic Yeasts other than Candida albicans and Comparison with the NCCLS Broth Microdilution Test

2000 ◽  
Vol 44 (10) ◽  
pp. 2752-2758 ◽  
Author(s):  
Rama Ramani ◽  
Vishnu Chaturvedi
Keyword(s):  
Flow Cytometry ◽  
Candida Albicans ◽  
Amphotericin B ◽  
Susceptibility Testing ◽  
Antifungal Susceptibility ◽  
Antifungal Susceptibility Testing ◽  
Broth Microdilution ◽  
Nitrogen Base ◽  
Microdilution Method ◽  
Broth Microdilution Method

ABSTRACT Candida species other than Candida albicansfrequently cause nosocomial infections in immunocompromised patients. Some of these pathogens have either variable susceptibility patterns or intrinsic resistance against common azoles. The availability of a rapid and reproducible susceptibility-testing method is likely to help in the selection of an appropriate regimen for therapy. A flow cytometry (FC) method was used in the present study for susceptibility testing ofCandida glabrata, Candida guilliermondii,Candida krusei, Candida lusitaniae,Candida parapsilosis, Candida tropicalis, andCryptococcus neoformans based on accumulation of the DNA binding dye propidium iodide (PI). The results were compared with MIC results obtained for amphotericin B and fluconazole using the NCCLS broth microdilution method (M27-A). For FC, the yeast inoculum was prepared spectrophotometrically, the drugs were diluted in either RPMI 1640 or yeast nitrogen base containing 1% dextrose, and yeast samples and drug dilutions were incubated with amphotericin B and fluconazole, respectively, for 4 to 6 h. Sodium deoxycholate and PI were added at the end of incubation, and fluorescence was measured with a FACScan flow cytometer (Becton Dickinson). The lowest drug concentration that showed a 50% increase in mean channel fluorescence compared to that of the growth control was designated the MIC. All tests were repeated once. The MICs obtained by FC for all yeast isolates except C. lusitaniae were in very good agreement (within 1 dilution) of the results of the NCCLS broth microdilution method. Paired ttest values were not statistically significant (P = 0.377 for amphotericin B; P = 0.383 for fluconazole). Exceptionally, C. lusitaniae isolates showed higher MICs (2 dilutions or more) than in the corresponding NCCLS broth microdilution method for amphotericin B. Overall, FC antifungal susceptibility testing provided rapid, reproducible results that were statistically comparable to those obtained with the NCCLS method.

scholarly journals Candida albicans isolated from post-operative penetrating keratoplasty patient: Case report

2014 ◽  
Vol 5 (3) ◽  
pp. 116-119
Author(s):  
Abhishek Chandra ◽  
Munesh Kumar Gupta ◽  
Ragini Tilak
Keyword(s):  
Candida Albicans ◽  
Case Report ◽  
Amphotericin B ◽  
Penetrating Keratoplasty ◽  
Antifungal Susceptibility ◽  
Medical Science ◽  
Eye Drops ◽  
Gram Staining ◽  
Chlamydospore Formation ◽  
Culture Characteristics

We report a case report of Candida albicans suture infiltrate on 3rd post-op day in a 53 year female operated for penetrating keratoplasty. Candida albicans was identified by KOH mount, Gram Staining, germ tube, growth at 450C, chlamydospore formation and light green color on CHROMagar with sugar assimilation and culture characteristics. Despite being susceptible to Fluconazole by broth microdilution, patient did not respond to 0.3% fluconazole eye drops. On antifungal susceptibility testing by CLSI44A, it was susceptible to only Amphotericin B (100units). Patient was then started on 0.15% fortified amphotericin B eye drops resulting in complete resolution of infiltrates. Asian Journal of Medical Science, Volume-5(3) 2014: 116-119 http://dx.doi.org/10.3126/ajms.v5i3.8669 

scholarly journals Antifungal susceptibility of Candida albicans isolated from oral mucosa of patients with cancer

1999 ◽  
Vol 13 (3) ◽  
pp. 219-223 ◽  
Author(s):  
Lino João da COSTA ◽  
Esther Goldenberg BIRMAN ◽  
Sidney Hartz ALVES ◽  
Arlete Emily CURY
Keyword(s):  
Candida Albicans ◽  
Cancer Patients ◽  
Amphotericin B ◽  
Oral Mucosa ◽  
Antifungal Susceptibility ◽  
New Drugs ◽  
Local Conditions ◽  
Opportunistic Fungi ◽  
Sabouraud Agar

The increasing number of oral infections due to opportunistic fungi in immunocompromised patients, needs a new evaluation of the drugs in use. The susceptibility in vitro of Candida albicans strains from the oral mucosa of cancer patients to amphotericin B, ketoconazole, miconazole, fluconazole and itraconazole were evaluated. A dilution technique in YNB agar or subculture on Sabouraud agar was utilised for MIC or MFC determinations. With this methodology, the best fungicidal drug for C.albicans collected from the oral mucosa of 40 cancer patients, divided in two groups: one treated by radiotherapy and the other not, the best results were obtained with amphotericin B, presenting low values of MIC compared to azoles and MFC values. However it is important to take into consideration the utilisation in vivo of this polyenic antibiotic and the possible toxic levels necessary to achieve good results. The coexistence of other fungi and the local conditions must also be pondered with these patients, who are mostly undergoing radiotherapy. In order to achieve better results without undesirable consequences, higher levels of MIC are expected with the daily clinical use of new drugs.

scholarly journals Genetic diversity and antifungal susceptibility of Candida albicans isolates from Iranian HIV-infected patients with oral candidiasis

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Iradj Ashrafi Tamai ◽  
Babak Pakbin ◽  
Bahar Nayeri Fasaei
Keyword(s):  
Genetic Diversity ◽  
Candida Albicans ◽  
Amphotericin B ◽  
Random Amplified Polymorphic Dna ◽  
Oral Candidiasis ◽  
Antifungal Susceptibility ◽  
Diffusion Method ◽  
Glucose Agar ◽  
Sabouraud Glucose Agar ◽  
Inhibition Zones

Abstract Objective The objectives of this study were to investigate the antifungal susceptibility and genetic diversity of Candida albicans isolated from HIV+ patients with oropharyngeal candidiasis. A total of 50 C. albicans isolates were cultured on Sabouraud glucose agar containing chloramophenicol. The antifungal susceptibility of the isolates against fluconazole, clotrimazole, nystatin, amphotericin B, ketoconazole and flucytosine was assessed using disc diffusion method. The genetic diversity of C. albicans isolates was determined using random amplified polymorphic DNA marker. Results The inhibition zones ranged from 4 ± 1.8 to 40 ± 3.8 mm for fluconazole, 7 ± 1.0 to 37 ± 1.8 mm for ketoconazole, 14 ± 0.8 to24 ± 0.8 mm for amphotericin B, 25 ± 0.0 to 33 ± 0.0 mm for nystatin and 7 ± 4.2 to 40 ± 0.0 mm for clotrimazole. At 90% similarity, three distinct groups were observed. The smallest cluster composed of 3 isolates, whereas the largest one composed of 17 isolates. 32% (16/50), 28% (14/50) and 14% (7/50) were resistant to fluconazole, ketoconazole and clotrimazole, respectively.

scholarly journals Complicated bilateral fungal emphysematous pyelonephritis in a 55-year-old diabetic female: A case report and review of literature

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Ensieh Lotfali ◽  
Sara Abolghasemi ◽  
Fatemeh Sadat Gatmirimotahhari ◽  
Mohammad Alizadeh ◽  
Zahra Arab-Mazar
Keyword(s):  
Renal Failure ◽  
Acute Renal Failure ◽  
Candida Albicans ◽  
Amphotericin B ◽  
Antifungal Susceptibility ◽  
Good Condition ◽  
Review Of Literature ◽  
Emphysematous Pyelonephritis ◽  
Patients With Diabetes ◽  
Serious Disease

Background and Purpose: Emphysematous pyelonephritis (EPN) is a rare and serious disease causing acute renal failure. Diabetes is a major risk factor for this infection.Case report: Herein, we present the case of a 55-year-old female patient with diabetes and EPN caused by Candida albicans. The infection was complicated with endophthalmitis and endocarditis. The results of antifungal susceptibility analysis showed that C. albicans was resistant to fluconazole and susceptible to amphotericin-B and itraconazole. Infection could be controlled by amphotericin-B followed by itraconazole therapy, and the patient was discharged in good condition while receiving antifungal therapy. Conclusion: Complicated pyelonephritis with unusual microorganisms should be considered in patients with diabetes and urinary symptoms. Keywords: Candida albicans, Emphysematous pyelonephritis

scholarly journals Impact of antifungal stewardship interventions on the susceptibility of Candida species in pediatric patients with malignancy

2020 ◽  
Author(s):  
Ali Amanati ◽  
Parisa Badiee ◽  
Hadis Jafarian ◽  
Fatemeh Ghasemi ◽  
Samane Nematolahi ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Amphotericin B ◽  
Pediatric Patients ◽  
Antifungal Susceptibility ◽  
Clinical Impact ◽  
Antifungal Stewardship ◽  
Inappropriate Use ◽  
Study Results ◽  
Tertiary Teaching ◽  
Broth Microdilution Method

Abstract Background There is a worldwide concern with respect to the antimicrobial resistance and the inappropriate use of antifungal agents, which had led to an ever-increasing antifungal resistance. This study aimed to identify the antifungal susceptibility of Candida species isolated from the pediatric patients with cancer and also to evaluate the clinical impact of antifungal stewardship (AFS) ‎interventions on antifungal susceptibility of Candida species. Methods In this study, Candida species colonization were evaluated among hospitalized children with cancer in a tertiary teaching hospital, Shiraz 2017-18. The broth microdilution method was used to determine the minimum inhibitory concentrations (MICs) for polyenes (amphotericin B), echinocandins (caspofungin), and azoles (voriconazole, fluconazole, posaconazole, and itraconazole). Antifungal susceptibility of Candida species was compared with our previous study results to determine the clinical impact of AFS interventions on the antifungal susceptibility. Results The prevalence of Candida albicans in the present study was significantly higher than other Candida species. Candida albicans species were completely susceptible to the azoles. The sensitivity rate of C. albicans to amphotericin B and caspofungin was 93.1% and 97.1%, respectively. The results confirm the positive effect of optimized antifungal usage and bedside intervention on the susceptibility of Candida species after the implementation of the AFS program. C. albicans and C. glabrata exhibited significant increase in sensitivity after the execution of AFS program. Conclusions Improving the antifungal agent usage can improve antifungal ‎susceptibility and reduce resistance. The AFS is recommended to be addressed, applied, and regularly assessed in centers.

scholarly journals Assessment of the Effect of Amphotericin B on the Vitality of Candida albicans

1999 ◽  
Vol 43 (5) ◽  
pp. 1034-1041 ◽  
Author(s):  
Robert S. Liao ◽  
Robert P. Rennie ◽  
James A. Talbot
Keyword(s):  
Candida Albicans ◽  
Amphotericin B ◽  
Total Population ◽  
Antifungal Susceptibility ◽  
Membrane Integrity ◽  
Quantitative Information ◽  
Fungal Cell ◽  
Fluorescent Indicators ◽  
Qualitative And Quantitative ◽  
Time Kill

ABSTRACT The processes involved in cell death are complex, and individual techniques measure specific fractions of the total population. The interaction of Candida albicans with amphotericin B was measured with fluorescent probes with different cellular affinities. These were used to provide qualitative and quantitative information of physiological parameters which contribute to fungal cell viability. SYBR Green I and 5,(6)-carboxyfluorescein were used to assess membrane integrity, and bis-(1,3-dibutylbarbituric acid)trimethine oxonol and 3,3-dihexyloxacarbocyanine iodide were used to evaluate alterations in membrane potential. The fluorescent indicators were compared with replication competency, the conventional indicator of viability. By using these tools, the evaluation of the response of C. albicans to amphotericin B time-kill curves delineated four categories which may represent a continuum between alive and dead. The data showed that replication competency (CFU per milliliter) as determined by conventional antifungal susceptibility techniques provided only an estimate of inhibition. Interpretation of fluorescent staining characteristics indicated that C. albicans cells which were replication incompetent after exposure to greater than 0.5 μg of amphotericin B per ml still maintained degrees of physiological function.

scholarly journals Trends in Antifungal Susceptibility amongCandida sp. Urinary Isolates from 1994 and 1998

2000 ◽  
Vol 38 (2) ◽  
pp. 870-871 ◽  
Author(s):  
Joseph Baran ◽  
Enid Klauber ◽  
Jeffrey Barczak ◽  
Kathleen Riederer ◽  
Riad Khatib
Keyword(s):  
Candida Albicans ◽  
Amphotericin B ◽  
Candida Tropicalis ◽  
Candida Glabrata ◽  
Antifungal Susceptibility ◽  
Geometric Means ◽  
Fluconazole Resistance ◽  
Urinary Isolates

Antifungal susceptibilities were determined from 80 urinary isolates of Candida species collected in 1994 and 1998. Our findings demonstrate increasing geometric means of fluconazole MICs and fluconazole resistance in Candida albicans andCandida tropicalis (those for Candida glabratawere unchanged) within the 4-year span. Amphotericin B and voriconazole MICs remained constant.

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