scholarly journals MIC, candida, antifungal The minimum inhibitory concentration of different antifungal agents against Candida species

2019 ◽  
Vol 31 (4) ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 1067-1070 ◽  
Author(s):  
Sedigheh Bakhtiari ◽  
Soudeh Jafari ◽  
Jamileh Bigom Taheri ◽  
Tahereh Sadat Jafarzadeh Kashi ◽  
Zahra Namazi ◽  
...  

BACKGROUND: Candida species are the most common opportunistic fungal infections. Today, cinnamon plants have been considered for anti-Candida properties. AIM: This study aimed to investigate the effectiveness of cinnamaldehyde extract (from cinnamon derivatives) on Candida albicans and Candida glabrata species and comparison with nystatin. MATERIAL AND METHODS: In this study, cinnamaldehyde and nystatin were used. The specimens included Candida albicans and Candida glabrata. Minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) were measured for each one by the microdilution method. This experiment was repeated three times. RESULTS: Cinnamaldehyde extract at a concentration of 62.5 μl/ml was able to prevent the growth of Candida albicans, at a concentration of 93.7 μl/ml, causing Candida albicans to disappear, at 48.8 μl/ml, to prevent the growth of Candida glabrata, and in the concentration of 62.5 μl/ml, causes the loss of Candida glabrata. In comparison, nystatin at 0.5 μg/ml concentration prevented the growth of Candida albicans, at concentrations of 1 μg/ml causing Candida albicans to be destroyed, at 4 μg/ml concentration to prevent the growth of Candida glabrata, and at a concentration of 8 μg/ml causes the loss of Candida glabrata. The results were the same every three times. CONCLUSIONS: Although cinnamaldehyde extract had an effect on fungal growth in both Candida albicans and Candida glabrata with a fatal effect; the effect on these two species was lower than nystatin.


Author(s):  
Georgiana NEGRU ◽  
Laure KAMUS ◽  
Elena Bîcu ◽  
Sergiu Shova ◽  
Boualem SENDID ◽  
...  

The treatment of benzylidenemalononitriles 3a-c with phenylhydrazines 4a-n in refluxing ethanol did not provide pyrazole derivatives but furnished hydrazones 1a-o. The structure of hydrazones was secured by X-Ray analysis. Newly synthesized hydrazones 1a-o were tested against 8 Candida spp. strains in a dose response assay to determine the minimum inhibitory concentration (MIC99). Five compounds 1c, 1d, 1i, 1k and 1l were identified as promising antifungal agents against Candida spp. (C. albicans SC5314, C. glabrata, C. tropicalis, C. parapsilosis and C. glabrata (R azoles)) with MIC99 values ranging from 16 to 32 µg/mL. To further evaluate the antifungal potential of the active compounds, they have been assayed against a mammalian cell line HEK293 to determine general cell toxicity and on NCI-60 cancer cell lines panel, demonstrating selectivity antifungal activity over cytotoxicity.


2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Grady L. Nelson ◽  
Michael J. Williams ◽  
Shirisha Jonnalagadda ◽  
Mohammad A. Alam ◽  
Gautam Mereddy ◽  
...  

Allylic acetates derived from Baylis-Hillman reaction undergo efficient nucleophilic isomerization with imidazoles and triazoles to provide imidazolylmethyl and triazolylmethyl cinnamates stereoselectively. Antifungal evaluation of these derivatives against Cryptococcus neoformans exhibits good minimum inhibitory concentration values. These compounds exhibit low toxicity in proliferating MCF-7 breast cancer cell line. Structure activity relationship studies indicate that halogenated aromatic derivatives provide better antifungal activity.


2021 ◽  
Vol 10 (15) ◽  
pp. e35101522434
Author(s):  
Bruno Bezerra Cavalcanti ◽  
Hermes Diniz Neto ◽  
Walicyranison Plinio da Silva-Rocha ◽  
Edeltrudes de Oliveira Lima ◽  
José Maria Barbosa Filho ◽  
...  

The aim of this study was to examine the effects of (-)-myrtenol alone and combined with antifungal agents against Candida spp. The Minimum Inhibitory Concentration (MIC) and Minimum Fungicidal Concentration of (-)-myrtenol and fluconazole against C. albicans and C. parapsilosis strains was obtained using CLSI guidelines. Combination of (-)-myrtenol with antifungal drugs was determined by checkboard test. The (-) myrtenol showed MIC ranging from 256 to 512 µg/mL against both species assay. And the MFC was 512 µg/mL, demonstrated nature fungicidal (MFC/MIC < 4). In addition, combination of antifungal agents (amphotericin B and fluconazole) and (-) myrtenol showed synergistic and additive effects on strains assays. Based on these results, the present study demonstrates that (-) myrtenol showed strong fungicide activity against Candida spp. In addition, Combination of antifungal agents and (-) myrtenol reduces the effective concentrations of both the agents with synergistic to additive effects. Therefore, (-) myrtenol has potential to be developed into an antifungal agent.


Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 6012
Author(s):  
Xinming Zhang ◽  
Tianzhan Zhang ◽  
Shuanli Guo ◽  
Yang Zhang ◽  
Rongtian Sheng ◽  
...  

Fungal infections pose a serious threat to human health. Polyoxometalates (POMs) are metal–oxygen clusters with potential application in the control of microbial infections. Herein, the Ag3PW12O40 composites have been synthesized and verified by Fourier transform infrared (FT-IR) spectrum, transmission electron microscopy (TEM), scanning electron microscope (SEM), elemental analysis, and X-ray diffraction (XRD). The antifungal activities of Ag3PW12O40 were screened in 19 Candida species strains through the determination of minimum inhibitory concentration (MIC) by the microdilution checkerboard technique. The minimum inhibitory concentration (MIC50) values of Ag3PW12O40 are 2~32 μg/mL to the Candida species. The MIC80 value of Ag3PW12O40 to resistant clinical isolates C. albicans HL963 is 8 μg/mL, which is lower than the positive control, fluconazole (FLC). The mechanism against C. albicans HL963 results show that Ag3PW12O40 can decrease the ergosterol content. The expressions of ERG1, ERG7, and ERG11, which impact on the synthesis of ergosterol, are all prominently upregulated by Ag3PW12O40. It indicates that Ag3PW12O40 is a candidate in the development of new antifungal agents.


2016 ◽  
Vol 5 (1) ◽  
pp. 132 ◽  
Author(s):  
Parvin Dehghan ◽  
Mehrnoush Maheronnaghsh ◽  
Sepideh Tolouei ◽  
Mostafa Chadeganipour ◽  
Maryam Yazdi

2019 ◽  
Vol 7 (12) ◽  
pp. 664 ◽  
Author(s):  
María L. De la Cruz-Claure ◽  
Ariel A. Cèspedes-Llave ◽  
María T. Ulloa ◽  
Miguel Benito-Lama ◽  
Enrique Domínguez-Álvarez ◽  
...  

Candida glabrata is one of the most prevalent pathogenic Candida species in dental plaque on tooth surfaces. Candida biofilms exhibit an enhanced resistance against most antifungal agents. Thus, the development of alternative more potent and effective antimicrobials is required to overcome this resistance. In this study, three novel fluorinated derivatives and nine selenoester compounds were screened as novel antifungal and antibiofilm agents against C. krusei, C. parapsilosis, and C. glabrata (N = 81 dental isolates). C. glabrata strains were susceptible only to fluorinated compounds while C. krusei, C. parapsilosis, and C. glabrata were susceptible to the action of the selenoesters. The evaluated symmetrical selenoester compounds presented very good antifungal activity against all the tested C. glabrata dental isolates (1–4 μg/mL of minimum inhibitory concentration-MIC). The most active compound (Se-5) was able to inhibit and disperse C. glabrata biofilms. These results demonstrated that selenoesters may be novel and promising biocide agents against C. glabrata clinical dental isolates.


2009 ◽  
Vol 123 (9) ◽  
pp. 978-981 ◽  
Author(s):  
G Yenişehirli ◽  
Y Bulut ◽  
M Güven ◽  
E Günday

AbstractObjective:To determine the causative pathogens of otomycosis, and to evaluate thein vitroactivity of antifungal agents against these pathogens.Materials and methods:A total of 96 fungal isolate were taken from 92 patients suspected of otomycosis. Thein vitroactivity of fluconazole, itraconazole and voriconazole against otomycotic pathogens was tested using the E-test method.Results:The most common pathogen wasAspergillus fumigatus(40.6 per cent), followed byA niger(35.4 per cent),A flavus(12.5 per cent) andCandida albicans(11.5 per cent). AllAspergillusspecies were found to be resistant to fluconazole (minimum inhibitory concentration ≥256 µg/ml). The mean minimum inhibitory concentrations of voriconazole forA fumigatus,A niger,A flavusandC albicanswere significantly lower than those of itraconazole for the same pathogens.Conclusion:This study found that the most common otomycotic fungal pathogen wasA fumigatus, and that voriconazole had more potentin vitroactivity than itraconazole against allAspergillusspecies as well as againstC albicans.


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