Showing 5 results for Dermatophyt
K Pakshir , F Zini , E Aliakhooni ,
Volume 57, Issue 4 (7-1999)
Abstract
In the present study, we investigated total cell protein patterns of ten isolates of Epidermophyton Floccosum Var.pigmented by SDS-PAGE on 10% polyacrylamide resolving gels. Densitometric analysis of the gels allowed to detect more than 31 clearly detectable mycelial protein bands with molecular weights in the range of 12 to 98 KD proteins of 12.5, 13.5, 14.4, 16, 18.4, 19.7, 20.1, 23.5, 26, 27, 29, 30, 32.5, 34, 35.5, 37, 39.5, 40.5, 43, 47.5, 50, 63, 68, 75, 79, 82.5, 74.5, 90, 94, 96, 97-5 KD were present but their frequencies varied among the isolates. Protein bands of 18.4, 19.7, 20.1, 27, 29, 34, 37, 43, 47.5, 50, 63, 79, 94, KD were stronger and common among the isolates and could be specific to recognize genus differences. Protein analysis by SDS-PAGE could be considered an useful technique in identifying differences among the dermatophyte isolates.
Sarasgani M R, Firoozrai M, Hashemi S J,
Volume 66, Issue 3 (6-2008)
Abstract
Background: Amino acids have different effects on the growth of some dermatophytes. Some may encourage growth, while others inhibit it. The concentrations of some amino acids also are an important factor for their effect. To investigate the effects of amino acids on the growth of dermatophytes, the dermatophytes Trichophyton schoenleinii and Microsporum canis, obtained from Iran.
Methods: In this study, two concentrations (1g/dL and 0.1g/dL) of 23 amino acids were added to the Sabouraud glucose agar media of these dermatophytes. The experiment was carried out three times. After two weeks, the means of the colonies were compared with the control, which had no amino acids added to the Sabouraud glucose media.
Results: The results showed that L-cysteine hydrochloride, L-cysteine, L-aspartic acid, L-glutamic acid and DL-tryptophan and L-tyrosine had the most inhibitory effects on the studied dermatophytes, while arginine L-lysine and L-methionine had moderate effects and the rest of amino acids had less inhibitory, or even stimulatory, effects on the growth of the dermatophytes. M. canis and T. schoenleinii has a different sensitivity to amino acids. This data indicates that sulfur-containing amino acids and acetic amino acids have greater inhibitory effect against these two dermatophytes.
This may be an indicator that such amino acids used in, for example, sweetener may have an important role in immunity to these dermatophytes. Thus, some amino acids may be used as a possible treatment for dermatophytosis.
Conclusion: Among the amino acids L-cysteine hydrocholoride, glutamic acid, aspartic acid, and tryptophan are the most inhibitory effect s against of T. schoenleinii and M. canis.
Ayatollah Nasrollahi Omran, Seyyed Jamal Hashemi, Farshad Hashemi,
Volume 68, Issue 1 (4-2010)
Abstract
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Background: Identification
of the determatophytosis species and superficial mycosis agents may be useful
in directing the survey for environmental and animal sources of infection to
educate the danger of acquiring infections from infected persons and other
animals. Based on this background the identification of cutaneous mycosis
distribution was the main purpose.
Methods: From March 2005 to Feb 2009 we examined 5500 patients suspected to superficial and cutaneous
mycosis referred to medical mycology labs in Tehran, Iran for Medical Mycology
examination. Skin, hair and nail sampling were taken by scraping from patients
and collected for diagnosis. Diagnosis was confirmed by direct microscopy and
culture according to the mycology routine laboratory methods.
Results: A total of 2271 cases (41.3%) suffered from superficial and cutaneous mycosis. The
most common infections were dermatophytosis 1279 cases (56.31%), Tinea Versicolor 356 cases (15.47%), Erythersma 283 cases (12.46%), cutaneous candidiosis 243 cases (10.7%) and
sacrophytic cutaneous mycosis 110 cases (4.83%). Tichophyton mentagrophytes was the most
common etiological agent with 198 cases (41.56%). The most common clinical type of cutaneous
candidiasis was onychomycosis and Candida albicans was the most common
etiological agent. The common sites of involvement of tinea versicolor were
neck and trunk and Malassezia globosa was most common etiologic agent.
Conclusion: This study highlights a common problem (Antropophilic
species) in Tehran and suggests that further measures regarding public health
and especially personal hygiene should be undertaken to reduce the risk of
superficial and cutaneous mycoses.
Zahra Fasihizade , Bahram Ahmadi , Gholam Reza Shokoohi , Nilufar Jalalizand , Marjan Motamedi , Hossein Mirhendi ,
Volume 77, Issue 4 (7-2019)
Abstract
Background: Dermatophytes create the most common fungal disease in humans, called dermatophytosis. The two species of Trichophyton rubrum and Trichophyton interdigital are responsible for over 80% of types of dermatophytosis. So far, several morphological and physiological methods have been used to differentiate these very similar species, but these methods are generally time-consuming and have low specificity. The purpose of this study was to introduce a simple and rapid duplex polymerase chain reaction (PCR) reaction to differentiate these two species from each other.
Methods: This research was an analytical and experimental study that was carried out from 2017 to 2018 in the Medical Mycology Laboratory, School of Public Health, Tehran University of Medical Sciences, Iran. For this purpose, the nucleotide sequences of the 4 regions of internal transcribed spacer (ITS), beta-tubulin, elongation factor 1 alpha and calmodulin in the two considered species of fungi were conducted bioinformatics analysis. The differences and similarities of nucleotides between two species in each of these genes were studied for selecting the primer. The specificity of selected primers was tested for duplex PCR reaction against sequenced isolates of dermatophyte species.
Results: According to the total data, the specific primers were selected from elongation factor 1 alpha gene. These primers produced a product of 173 and 384 bp, in Trichophyton rubrum and Trichophyton interdigital, respectively. They had high specificity in the face of various dermatophytes. The length of nucleotide sequences found in the genebank of this gene in the two species is between 700 and 770 bp. The similarity of the two species in this region is 94.6% and differs by 78 bp. Of the 107 extracted DNAs from clinical dermatophyte isolates, in duplex PCR 24 isolates were positive with Trichophyton interdigital primer and 71 isolates against Trichophyton rubrum. The remaining isolates, which included 6, were negative in this reaction, which included other dermatophyte species.
Conclusion: This method is a specific and fast differential method compared to conventional methods for identifying Trichophyton rubrum and Trichophyton interdigital from each other.
Armaghan Kazeminejad, Nooshin Izadpanahi, Somayeh Sheidaei, Samira Sadeghi, Maryam Ghasemi,
Volume 78, Issue 10 (1-2021)
Abstract
Background: Dermatophyte is a group of keratinophilic fungi that cause various skin lesions depending on the affected area. Dermatophytosis is usually diagnosed by clinical manifestation and confirmed by direct microscopy or fungal culture. There might be diagnostic difficulty with the presence of atypical dermatophytosis. Atypical dermatophytosis presents with clinical appearances ranging from eczematous, psoriasiform, pustular lesions, and others, that interferes with early diagnosis and disturbs patient’s life quality. Genital dermatophytosis is an uncommon presentation of cutaneous fungal infection; moreover, its manifestation without the involvement of the inguinal area, and simulating wart is a rare sign. In this study, we introduce a rare case of dermatophytosis with a wart-like appearance that was restricted to the skin of the genitalia.
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Case Presentation: A 24-years-old woman was referred to the academic dermatology clinic of Boo- Ali SINA Hospital in Sari, Iran, in November 2019 with a 9-month complaint of verrucous and pruritic plaque in the genital area that previously misdiagnosed as wart with no response to treatment. The dermatologist requested a review of the previous pathology documents for diagnosing dermatophytosis. The pathologists reexamined the relevant paraffin-embedded skin tissue block of the patient. By Periodic acid-Schiff staining, some fungal elements had been found in the horny layers of the epidermis, so dermatophytosis was confirmed. Based on this diagnosis, terbinafine was prescribed and the patient responded well to this treatment after four weeks.
Conclusion: Although the occurrence of genital dermatophytosis with the verrucous appearance and without involvement of groin is a rare finding, it should be considered in the differential diagnosis. In each case suspected of genital dermatophytosis, direct examination or fungal culture for definite diagnosis and prevention of delay in the appropriate treatment is required.
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