Showing 8 results for Candida Albicans
Abbas Rezaei, Zabihullah Shahmoradi, Amir Hossein Siadat, Ali Asilian,
Volume 7, Issue 1 (3-2004)
Abstract
Introduction: Some articles have suggested an increase in the prevalence of oral candidiasis in patients with psoriasis, as well as the potential for exacerbation or chronicity of psoriasis. Therefore, the prevalence of oral candidiasis in patients with psoriasis and its comparison with healthy individuals has been considered.
method: In this cross-sectional study, 43 people with psoriasis and 43 seemingly healthy individuals referred to dermatology clinics affiliated with Isfahan University of Medical Sciences were randomly selected and examined for the presence or absence of Candida albicans in the oral mucosa by direct lam and culture. Were placed.
Results: According to the results of this analytical study, 44.2% of patients with psoriasis with Candida albicans were infected with oral cavity, which was 25.6% for healthy individuals, and this difference was significant (p=0.05). There was also a significant relationship between the severity of psoriasis and the prevalence of oral Candida albicans (p=0.05).
Conclusion: The study found that candida yeast was more common in patients with psoriasis than in healthy people. According to the results of this study, it is recommended that all patients with psoriasis be examined for the presence of Candida albicans in the mouth and, if the test is positive, be treated with antifungal drugs.
Marzieh Akbarzadeh, Batol Bonyadpoure, Kayvan Pacshir, Abdolali Mohagheghzadeh,
Volume 13, Issue 3 (9-2010)
Abstract
Background: Candida vaginitis which is mostly caused by Candida albicans is the second common cause of vaginal candidiasis in women. This study was designed to determine the clinical symptoms of Candida vaginitis and their relationship with the types of Candida species in women referring to the clinics of Shiraz University of Medical Sciences. Materials and Methods: In an analytical study, over a seven month period of sampling, through the examination of the history of 1100 patients, 450 were identified with chief complaints regarding genital infection. Samples were obtained from 280 of these patients according to their histories and the characteristics of their vaginal discharges. Of these patients, 105 were diagnosed with Candida vaginitis. The analysis of Candidal species was done through germ tube and chlamidospore agar tests. Results: Urogenital itching was severe in more than 43.8% of patients. White color genital discharges were more observable than other symptoms (88.6%). In negative Candida culture samples, severe itching, white color discharge, and disuria were reported to be 23, 80.8, and 43.5%, respectively. Candida albicans composed 70.5% of the samples. Colony count was between 51 and 500 in 49.5% of all samples. There were no significant relationships between colony count and rate of itching, family planning program, and other symptoms. Conclusion: Due to the uncertainty of diagnosis of this disease according to clinical symptoms and also, due to the consistency and resistance of Candida species, using culture method is recommended as a standard method of diagnosis.
Mahmoud Bahmani, Mostafa Ghorbani, Hassan Momtaz, Ehsan Bahmani, Mahmoud Rafieian,
Volume 13, Issue 4 (1-2011)
Abstract
Background: Candida species are among the most important factors in development of fungal infection in human beings and animals. Noticing the daily increase of drug resistance, attempts should be made for providing anti-fungal and anti-microbial drugs. Hence, this study was conducted to investigate the in-vitro effects of Scrophularia deserti ethanolic extract and amphotricin B on Candida albicans. Materials and Methods: In an experimental trial, anti-Candida effects of Scrophularia deserti ethanolic extract and amphotricin B on Candida albicans were evaluated using serial dilution method. Data analysis was done using SPSS, through paired and independent t-tests. Results: Minimum inhibition capacity (MIC) of Scrophularia deserti extract on Candida albicans in the first and second trials were OD600=1.56(59%) and OD600=1.68(59%), respectively, whereas this value for amphotricin B was 59%. The difference between minimum growth inhibition capacity of Scrophularia deserti and amphotricin B was not significant. Conclusion: The findings of this study indicated that ethanolic extract of Scrophularia deserti has anti-fungal properties comparable to amphotricin B.
Farnoosh Haghighi, Shahla Roudbar Mohammdi, Parisa Mohammadi, Mehdi Eskandari,
Volume 15, Issue 1 (4-2012)
Abstract
Background: Candida albicans is the fourth common cause of chronic fungal infections that cause both mucosal and deep tissue infections. Nowadays, mortality and morbidity due to C .albicans infections via medical devices, such as catheter and implants, are increasing. Therefore, finding new methods of combating such infectious agents seems necessary. In this study antifungal effects of titanium dioxide nanoparticles and photocatalyst TiO2 nanoparticles on C .albicans biofilms were investigated.
Materials and Methods: In this experimental study, TiO2 nanoparticles were synthesized and exposed to UV ray with 370 nm wavelength. Biofilms of C. albicans were developed on flat-bottomed 96-well microtiter plates, and antifungal effects of TiO2 and photocatalyst TiO2 nanoparticles were evaluated. Data were analyzed by t-test using SPSS software.
Results: MIC50 of photocatalyst TiO2 nanoparticles was 1.9 µg/ml and its MIC90 was 2.74 µg/ml while MFC was determined to be 3.37 µg/ml. Biofilms inhibitory concentration of TiO2 nanoparticles, photocatalyst TiO2 nanoparticles, and fluconazole for susceptible strains were 5.14, 4.54, and 4 µg/ml, respectively. These values for the fluconazole resistant strains were 5.35, 4.88, and 8 µg/ml, respectively.
Conclusion: Photocatalyst TiO2 nanoparticles showed a suitable antifungal property against C. albicans biofilms compared with fluconazole. Thus it can be a new strategy in prevention of fungal biofilms, especially those formed on the surface of medical devices.
Homeyra Babaei, Javaher Chabavizadeh, Parvin Dehghan, Rasoul Mohammadi,
Volume 19, Issue 8 (11-2016)
Abstract
Abstract
Background: Candida albicans is still the main etiologic agent of candidiasis. However, infections of non-albicans Candida species are increasing. Candida dubliniensis is similar to C. albicans phenotypically and must be identified due to the better management of infection. The aim of the present study is to defferentiate and identify Candida species by Duplex PCR for getting an epidemiological data of Candida species among clinical specimens.
Materials and Methods: DNA was extracted using phenol-chloroform method from fresh colonies. Internal Transcribed Spacer region was amplified by polymerase chain reaction using specific primers. Based on differences of bands sizes on agarose gel electrophoresis, species were identified.
Results: Ninety four out of 100 patients (49 males and 51 females) had predisposing factors in the present study. Diabetes (73.4%), use of antibiotic (6.3%), vitamin deficiency (4.3%) were the main predisposing factors. The most specimens belonged to mouth (75%), vagina (5%), and blood (4%). All isolates were identified as C. albicans.
Conclusion: Duplex PCR is a rapid and precise method for the detection and differentiation of Candida species carefully, and in this method, phenotypic tests like germ-tube and chlamydoconidia production, as well as biochemical tests are not required for clinical laboratories that have limited resources and time for response to the patients, and it can replace with the traditional methods.
Saeedeh Balabandi, Zeinab Khazaei -Koohpar, Najmeh Ranji,
Volume 20, Issue 7 (10-2017)
Abstract
Abstract
Background: Candida albicans as an opportunistic fungal pathogen in human causes candidiasis. The widespread use of azoles has led to the increase of azole resistance in Candida albicans isolates. Mutation in the ERG11 gene is one of several azole resistance reasons in Candida albicans. The aim of this study was to find ERG11 gene mutations in fluconazole resistant isolates in Rasht.
Materials and methods: Candida albicans isolates were identified by standard identification methods such as germ tubes. The fluconazole resistance and susceptibility of the isolates was evaluated by Disc diffusion and MIC methods. For mutation determining, ERG11 gene was amplified by PCR and then sequenced in clinical isolates.
Results: From 23 isolates of Candida albicans, 20 isolates were fluconazole resistant. The MIC of fluconazole in these isolates was determined between 128 to 2048µg/ml. Also, sequencing analysis showed that 10 fluconazole resistant isolates had two missense mutations (D116E and E266D) in ERG11 gene.
Conclusion: In this study, resistance to high concentration of fluconazole shows that different mechanisms simultaneously implicated in developing azoles resistance in the isolates. Association of ERG11 gene mutation and deregulation of other genes can be led to resistance to high fluconazole concentration in this study.
Alireza Khodavandi, Fahimeh Alizadeh, Nedasadat Marashi,
Volume 20, Issue 11 (2-2018)
Abstract
Abstract
Background: Biofilm formation represents one of the major virulence factors of Candida albican. However, the number of antifungal drugs is limited for the treatment of candidiasis. Combination therapy is one of the most frequently used techniques to alleviate this problem. In this study, we aimed to evaluate the antifungal activity of fluconazole and terbinafine alone and in combination on C. albicans biofilm inhibition.
Materials and Methods: In this cross- sectional study, 10 clinical isolates of C. albicans were identified from the immunocompromised patients. Antifungal susceptibilities were performed using the CLSI standard reference method. The crystal violet colorimetric method, direct microscopic observation and expression of HWP1 gene at different concentrations based on MICs were carried out to investigate inhibition of biofilm formation in C. albicans treated alone and in combination with fluconazole and terbinafine.
Results: The data indicated that combination of fluconazole with terbinafine exerted synergistic effects with fractional inhibitory concentration index ranged from 0.375 to 1.5. The combination of fluconazole with terbinafine reduced the number of yeast form and inhibited the biofilm formation. Finally, the expression level of HWP1 was down regulated (p< 0.05).
Conclusion: These results suggest the possibility of fluconazole/ terbinafine to treat candidiasis with a higher efficiency. In addition, HWP1 gene could be probable target in synergistic interaction of fluconazole/ terbinafine against C. albicans biofilm.
Doctor Vahideh Nazari, Octor Mojtaba Didehdar, Octor Fateme Golestanipour,
Volume 24, Issue 6 (1-2022)
Abstract
Background and Aim: A common infection in complete or partial denture wearers is denture stomatitis. One of the most important factors in the adhesion of Candida albicans is the surface and chemical properties of the denture base materials. The aim of this study was to investigate the surface roughness and adhesion of Candida albicans to two different types of acrylic materials.
Materials and Methods: In this experimental study, 16 samples were prepared from each of Vertex and Ivoclar acrylic resin. The surface roughness of the samples was measured by a profilometer. The samples were then placed in a cell suspension of Candida albicans. After incubation and staining with acridine orange, the yeast cells attached to the acrylic samples were counted using a fluorescent microscope. Data were statistically analyzed by T-test.
Ethical considerations: This article is approved by the ethics committee of Arak University of Medical Sciences with the ethics code: IR.ARAKMU.REC.1398.301.
Findings: There was no statistically significant difference in the mean of surface roughness between the two study groups (P = 0.311). However, Candida albicans colonization in ivoclar acrylic was significantly lower than vertex acrylic. (P = 0.000).
Conclusion: Differences in surface topography and physical and chemical properties of Vertex and Ivoclar acrylic resin affect the adhesion of Candida albicans.
