825 results on '"Seborrhoeic dermatitis"'
Search Results
2. Eczematous Dermatoses
- Author
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Foti, Caterina, Bonamonte, Domenico, Bosco, Anna, Angelini, Gianni, Angelini, Gianni, editor, Bonamonte, Domenico, editor, Foti, Caterina, editor, and Pragnell, Mary VC, Translated by
- Published
- 2021
- Full Text
- View/download PDF
3. Eczema and Dermatitis
- Author
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Morrone, Aldo, Morrone, Aldo, editor, Hay, Roderick, editor, and Naafs, Bernard, editor
- Published
- 2020
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4. Comparison of the skin lesions in patients with coronary artery disease at the time of admission in coronary care unit (CCU) and at discharge
- Author
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Fariba Iraji, Ali Asilian, Gita Faghihi, and Amirhossein Akbari
- Subjects
skin lesions ,coronary care unit ,rosacea ,seborrhoeic dermatitis ,Medicine - Abstract
Background: Patients admitted in especial units such as coronary care unit (CCU) require intensive care for different aspects including skin problems. Here in this report we aimed to perform a survey on different skin lesions in patients admitted in CCU by the time of admission and when discharging. Methods: In this cross-sectional study, we had a survey on 200 patients admitted in CCU in AL-Zahra hospital, Isfahan. A dermatologist observed and examined each patients for any skin lesions by the time of admission and when discharging from CCU. Results: Here we showed that 15 percent of patients admitted in CCU have at least one skin lesion and also we indicated that seborrhea dermatitis and then rosacea have the most prevalence by the time of admission in CCU. Other skin lesions were acute skin failure. We also showed that prevalence of bed sore and pressure sores increased amazingly during admission. Conclusion: Rosacea, seborrhea dermatitis and drug allergic reactions after pressure sores are the most frequent skin lesions in CCU and there might be an association between rosacea and cardiovascular diseases.
- Published
- 2021
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5. Geriatric Skin and Dermatosis
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Davies, Derek, Nagaratnam, Nages, editor, Nagaratnam, Kujan, editor, and Cheuk, Gary, editor
- Published
- 2019
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6. Treating head lice: a case study.
- Author
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Nazarko, Linda
- Subjects
- *
SKIN diseases , *ALCOHOLISM , *SEBORRHEIC dermatitis , *PEDICULOSIS , *HAIR care products , *TREATMENT effectiveness , *MENTAL illness - Abstract
People who are homeless are greater risk of infections than the general public because they are often in poor health and have difficulty maintaining hygiene. This article discusses the treatment of head lice and uses a case history to outline specific issues that may arise in a person who is homeless and how these can be managed. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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- View/download PDF
7. Quality of Life of Infants, Toddlers and Preschoolers with Seborrhoeic, Allergic Contact and Atopic Dermatitis Before and During COVID-19 Pandemic.
- Author
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Chernyshov, Pavel V., Vozianova, Svitlana V., and Chubar, Olga V.
- Subjects
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COVID-19 pandemic , *ATOPIC dermatitis , *CONTACT dermatitis , *ECZEMA , *PRESCHOOL children , *QUALITY of life - Abstract
Introduction: Different aspects of quality of life (QoL) of infants and children with atopic dermatitis (AD) are well studied but there is a lack of studies on seborrhoeic dermatitis (SD) and allergic contact dermatitis (ACD). The aim of this study was to compare the impact of SD, ACD and AD on young children. Parts of questionnaires were filled in during the COVID-19 pandemic and therefore we decided to check if the pandemic affected dermatology-specific health-related quality of life (HRQoL) in our patients. Methods: In this cross-sectional study approved by the local ethics committee of the Kiev City Clinical Dermatovenereologic Hospital parents of children with SD, ACD and AD from birth to 4 years old from the same department of dermatology were asked to fill in the dermatology-specific questionnaire the Infants and Toddlers Dermatology Quality of Life (InToDermQoL). Diagnoses were based on clinical manifestations and anamnesis. The study was carried out from 2018 till 2021. Results: The InToDermQoL questionnaire was filled in by 176 parents of children with SD, ACD and AD. Mean total InToDermQoL scores were significantly higher in children with AD than in SD and ACD (P < 0.01). HRQoL of children with AD during the COVID-19 pandemic was significantly worse than before pandemic (41.30 ± 24.40 and 28.51 ± 17.67 respectively, P = 0.02). Scores of the item on 'sleep problems' significantly decreased during the COVID-19 pandemic in children with SD (1.19 ± 1.01 and 0.64 ± 0.63, P < 0.05), as did scores of the item on 'rejection by other children' in children with AD (0.96 ± 0.98 and 0.20 ± 0.45, P < 0.05). Conclusions: To the best of our knowledge this is the first study on HRQoL of the youngest children with SD and ACD. In our study children with SD and ACD had comparable but lower impact of skin disease on their HRQoL than children with AD. The COVID-19 pandemic led to more severe HRQoL impairment in patients with AD visiting a dermatology department. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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8. Chemical composition and antimycobacterial, anti- Malassezia furfur and cytotoxic activities of essential oils from Callistemon viminalis (Sol. ex Gaertn.) G. Don leaves and flowers.
- Author
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Silva IJMM, Fernandes CC, Silva NBS, Calefi GG, Martins CHG, Silva JBA, Crotti AEM, and Miranda MLD
- Abstract
Callistemon viminalis has been widely known due to its therapeutic properties. Tuberculosis is a deadly infectious disease caused predominantly by Mycobacterium tuberculosis . Other respiratory diseases may also be caused by nontuberculous mycobacteria. Malassezia furfur causes dermal inflammation and tissue damage. This study aimed to evaluate in vitro inhibitory effects of essential oils (EOs) from C. viminalis leaves (EO-CL) and flowers (EO-CF) against M. tuberculosis , Mycobacterium kansasii , Mycobacterium avium and M. furfur strains. Their cytotoxic activity was evaluated by the brine shrimp assay. Resulting MIC values of all EOs under study were promising since they ranged from 50 to 100 µg/mL. Both EO-CL and EO-CF showed nontoxicity against Artemia salina by the brine shrimp assay (LC
50 > 1000 µg/mL). GC-FID and GC-MS analyses showed that 1,8-cineole was the major component of both EOs. These results revealed the promising potential of EO-CL and EO-CF to develop new antibacterial and antifungal drugs.- Published
- 2024
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9. Seborrhoeic Dermatitis and Sebo-psoriasis
- Author
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Hall, Anthony and Hall, Anthony
- Published
- 2019
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10. Light-emitting diode light therapy for facial seborrhoeic dermatitis: A case report
- Author
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Sanjeewani Fonseka, Kumudu Hasanka Heshani Narankotuwa, and Dilan Dileepa Jayarathne Bandara
- Subjects
light-emitting diode light therapy ,seborrhoeic dermatitis ,treatment-resistant ,Surgery ,RD1-811 - Abstract
Seborrhoeic dermatitis (SD) is a chronic, relapsing, papulosquamous inflammatory itchy dermatoses. It manifests as erythematous papules, macules, or ill-defined flat plaques with varying levels of scaling and pruritus. The exact pathogenesis of this condition is not known but Malassezia yeasts, hormones (androgens), amount of sebum produced, and deranged immune response are known to play important roles in its development. There is a wide range of therapeutic options to treat SD but some patients do not respond to any of the treatments. Here, we report three patients with treatment-resistant facial SD, successfully treated with light-emitting diode light therapy (LED-LT).
- Published
- 2021
- Full Text
- View/download PDF
11. Seborrhoeic dermatitis and sebopsoriasis developing in patients on dupilumab: Two case reports
- Author
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Ali Al‐Janabi and Alexander M. Marsland
- Subjects
adverse event ,dupilumab ,sebopsoriasis ,seborrhoeic dermatitis ,Medicine ,Medicine (General) ,R5-920 - Abstract
Abstract Cutaneous adverse events to dupilumab can be varied; this necessitates keeping a broad differential diagnosis to identify seemingly paradoxical reactions. It may be possible to treat the adverse event concurrently without stopping dupilumab.
- Published
- 2020
- Full Text
- View/download PDF
12. Comparison of the skin lesions in patients with coronary artery disease at the time of admission in coronary care unit (CCU) and at discharge.
- Author
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Iraji, Fariba, Asilian, Ali, Faghihi, Gita, and Akbari, Amir Hossein
- Subjects
SKIN diseases ,ROSACEA ,SEBORRHEIC dermatitis ,CROSS-sectional method ,PRESSURE ulcers ,PATIENTS ,CORONARY disease ,SKIN inflammation ,CORONARY care units ,HOSPITAL admission & discharge ,SURVEYS ,DRUG allergy ,DISCHARGE planning - Abstract
Copyright of Medical Journal of Tabriz University of Medical Sciences is the property of Tabriz University of Medical Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
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13. Sociodemographic characteristics and spectrum of Malassezia species in individuals with and without seborrhoeic dermatitis/dandruff: A comparison of residents of the urban and rural populations.
- Author
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Honnavar, Prasanna, Chakrabarti, Arunaloke, Dhaliwal, Manpreet, Dogra, Sunil, Handa, Sanjeev, Lakshmi, P V M, and Rudramurthy, Shivaprakash M
- Abstract
Seborrhoeic dermatitis/dandruff (SD/D) is a common, persistent, relapsing inflammatory condition affecting the areas rich in sebaceous glands. SD/D is widely prevalent in India but Malassezia species implicated are not well studied. To estimate the prevalence and spectrum of Malassezia species causing SD/D and understand the sociodemographic characteristics of SD/D in rural and urban populations, a total of 200 SD/D patients and 100 healthy controls (HC) from both rural and urban backgrounds were enrolled in this study. SD/D severity was clinically graded as mild, moderate, severe, and very severe. The isolates were identified by phenotypic characters and confirmed by ITS2 PCR-RFLP and sequencing of the ITS region of rDNA. Severe (59%) and very severe (71%) form of SD/D was higher in the rural population compared to the urban population (P = .004). The isolation rate of Malassezia was significantly higher in overall SD/D patients scalp (82%) compared to HC (67%) (P = .005). From the scalp of SD/D patients, M. globosa (36.2%) was predominantly isolated followed by M. restricta (31.3%) , M. furfur (15.7%) , a mixture of M. globosa and M. restricta (12%) or M. arunalokei (4.8%). Similarly, M. globosa (49.3%) was predominately isolated from the scalp of HC followed by M. restricta (22.4%). M. restricta was significantly higher in the scalp of SD/D patients compared to HC and/or nasolabial fold of both SD/D patients and HC (P = .0001). Our findings indicate that M. restricta has a high association with SD/D. More severe disease frequency was observed in the rural population. Precis Dandruff is associated with Malassezia restricta and very severe cases are higher in rural population, probably due the poor hygiene. Moderate to severe hair loss and itching were strongly associated with dandruff. Use of soaps to cleanse scalp appears to be better than shampoo in preventing dandruff. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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14. Risk Factors for Seborrhoeic Dermatitis Flares: Case-control and Case-crossover Study
- Author
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Rémi Lancar, Pascale Missy, Alain Dupuy, Philippe Beaulieu, Laurence Fardet, Dominique Costagliola, and Olivier Chosidow
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seborrhoeic dermatitis ,stress ,alcohol ,Dermatology ,RL1-803 - Abstract
Patients with flares of seborrhoeic dermatitis were compared with control outpatients seen during the same time-period in a case-control study, and with themselves while in remission in a case-crossover study. All patients consulted the same office-based dermatologist. During the study period, 189 cases and 189 controls were included in the case-control study, and 81 cases in the case-crossover study. Multivariate analysis was performed. Case-control study results were the following: past history of tobacco consumption (odds ratio (OR) 2.2 (95% confidence interval (CI) 1.1–4.6)), conflict as a dispute during the past month (OR 10.6 (95% CI 1.0–114.3)), alcohol consumption on a regular basis (OR 10.2 (95% CI 2.0–52.6)), and higher level of stress during the past month (OR 8.2 (95% CI 3.4–19.9)). Case-crossover study results were the following: higher level of stress during the past month (OR 4.5 (1.7–12.2)), association borderline significant for higher level of alcohol consumption (OR 5.4 (0.8–34.9)). These risk factors for flares of seborrhoeic dermatitis should be taken into account carefully in the daily management of seborrhoeic dermatitis.
- Published
- 2020
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15. Hubungan Perilaku Perawatan Rambut Terhadap Kejadian Dermatitis Seboroik pada Siswi SMA Muhammadiyah 1 Semarang
- Author
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Bevi Ayu, Retno Indrastiti, and Kanti Ratnaningrum
- Subjects
seborrhoeic dermatitis ,individual hygiene ,hair-care behavior ,hijab storage ,Medicine (General) ,R5-920 - Abstract
Latar Belakang: Dermatitis seboroik terjadi pada setengah populasi global remaja dan pasca-pubertas. Dermatitis seboroik menjadi salah satu masalah pada pengguna hijab, oleh karena itu peneliti ingin mengetahui perilaku perawatan rambut terhadap kejadian dermatitis seboroik pada siswi SMA Muhammadiyah 1 Semarang. Metode: Penelitian ini merupakan observasional analitik dengan pendekatan cross sectional. Pengambilan sampel menggunakan rumus slovin dengan teknik simpel random sampling. Populasi sampel merupakan Siswi SMA Muhammadiyah 1 Semarang kelas 2 dan kelas 3 dengan kriteria inklusi siswi yang konsisten menggunakan hijab selama berada di sekolah dan di kehidupan sehari-hari, siswi berusia 15-17 tahun, sedangkan kriteria ekslusi meliputi siswi yang menderita penyakit kulit bagian kepala seperti Tinea Capitis, Psoriasis, Alopecia Areata, dan Pedikulosis, serta siswi yang pernah mengalami post trauma pada kepala (Trikotilomania, Alopecia dan siswi yang mengalami post operasi pada kepala. Data penelitian menggunakan data primer dengan pemeriksaan fisik menggunakan loop dan wawancara dengan kuesioner. Uji statistik penelitian menggunakan uji chi-square dan regresi logistik. Hasil: Dari 66 siswi, didapatkan hasil bahwa 84,8% (50 siswi) mengalami dermatitis seboroik. Pengunaan handuk (p=0,016; ß=3,429), frekuensi mengganti handuk (p0,022; ß=2,678), dan cara menyimpan handuk (p=0,018; ß=2,829) berpengaruh pada kejadian dermatitis seboroik Simpulan: Terdapat hubungan yang signifikan antara perilaku perawatan rambut terhadap dermatitis seboroik pada siswi SMA Muhammadiyah 1 Semarang. Background: Seborrhoeic dermatitis occurs in half the global population of post-puberty adolescents. Seborrhoeic dermatitis is one of the problems in hijab users, therefore researchers want to know behavior of hair treatment to the occurrence of seborrheic dermatitis in students of High School Muhammadiyah 1 (SMA Muhammadiyah 1) Semarang. Method: an analytic observational study with cross sectional. Sampling using slovin formula with simple random sampling technique. The sample population is studentsof SMA Muhammadiyah 1 Semarang class 2 and 3 with inclusion criteria consistent by using hijab during school and everyday life, female students aged 15-17 years;exclusion criteria include students suffering from skin diseases of the head such as Tinea Capitis, Psoriasis, Alopecia Areata, and Pediculosis; and students who have experienced post trauma to the head (Trichotillomania, Alopecia) and postoperative students on the head. Research data using primary data by physical examination using loop and interview with questionnaire. The research statistic used chi-square test and logistic regression. Results: From 66 female students, it was found that 84.8% (50 girls) had seborrheic dermatitis. use of towel (p = 0.016; ß = 3.429), the frequency of towel replacing (p0.022; ß= 2,678), and the way of towel (p= 0,018; ß = 2,829) had significant on occurrence of seborrhoeic dermatitis. Conclusion: There is a significant relationship between hair treatment behavior against seborrheic dermatitis in high school students of Muhammadiyah 1 Semarang
- Published
- 2018
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16. Risk Factors for Seborrhoeic Dermatitis Flares: Case-control and Case-crossover Study.
- Author
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LANCAR, Rémi, MISSY, Pascale, DUPUY, Alain, BEAULIEU, Philippe, FARDET, Laurence, COSTAGLIOLA, Dominique, and CHOSIDOW, Olivier
- Subjects
- *
CASE-control method , *SKIN inflammation , *FLARES , *ODDS ratio , *ALCOHOL drinking - Abstract
Patients with flares of seborrhoeic dermatitis were compared with control outpatients seen during the same time-period in a case-control study, and with themselves while in remission in a case-crossover study. All patients consulted the same office-based dermatologist. During the study period, 189 cases and 189 controls were included in the case-control study, and 81 cases in the case-crossover study. Multivariate analysis was performed. Case-control study results were the following: past history of tobacco consumption (odds ratio (OR) 2.2 (95% confidence interval (CI) 1.1-4.6)), conflict as a dispute during the past month (OR 10.6 (95% CI 1.0-114.3)), alcohol consumption on a regular basis (OR 10.2 (95% CI 2.0-52.6)), and higher level of stress during the past month (OR 8.2 (95% CI 3.4-19.9)). Case-crossover study results were the following: higher level of stress during the past month (OR 4.5 (1.7-12.2)), association borderline significant for higher level of alcohol consumption (OR 5.4 (0.8-34.9)). These risk factors for flares of seborrhoeic dermatitis should be taken into account carefully in the daily management of seborrhoeic dermatitis. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
17. Topical application of nanoparticles integrated supramolecular hydrogels for the potential treatment of seborrhoeic dermatitis.
- Author
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Garg, Abhinava, Singh, Charan, Pradhan, Deepak, Ghosh, Goutam, and Rath, Goutam
- Subjects
NANOPARTICLES ,SKIN inflammation ,HYALURONIC acid ,SELENIUM - Abstract
The current application was aimed to evaluate the therapeutic potential of selenium and ketoconazole nanoparticles loaded hyaluronic acid gel against seborrhoeic dermatitis (SD). Amalgamation of ketoconazole (antifungal medication) and selenium (pro-oxidant) in an optimized formulation setting may help in the treatment of SD. In this study, selenium and ketoconazole nanoparticles loaded hyaluronic acid (HA) hydrogel was prepared by mechanical mixing followed by sonication. Results of the optimized batch showed a mean particle size of 121 ± 12 nm for ketoconazole and 51 ± 7 nm for selenium. SEM and TEM study revealed the prepared nanoparticles are of nanoscale dimension, with smooth spherical outline. Finally, the optimized nanoparticles were incorporated into HA hydrogel. Hydrogel exhibits desirable physical, mechanical and rheological characteristics appropriate for topical application. Optimized gel formulation exhibited an enhanced permeability with better antifungal, and anti-inflammatory activities, compared with the plain drug suspension. The optimized hydrogel with ketoconazole and selenium in nanotemplate could offer a potential strategy for the treatment of SD. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
18. Malassezia colonisation on a reconstructed human epidermis: Imaging studies.
- Author
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Pedrosa, Ana Filipa, Lisboa, Carmen, Branco, Joana, Almeida, Ana C., Mendes, Claudia, Pellevoisin, Christian, Leite‐Moreira, Adelino, Miranda, Isabel M., and Rodrigues, Acacio G.
- Subjects
- *
EPIDERMIS , *MALASSEZIA , *DIAGNOSTIC imaging , *COLONIZATION , *FLUORESCENCE microscopy , *MICROBIAL virulence , *SCANNING electron microscopy - Abstract
Summary: Background: Biofilm formation represents a major microbial virulence attribute especially at epithelial surfaces such as the skin. Malassezia biofilm formation at the skin surface has not yet been addressed. Objective: The present study aimed to evaluate Malassezia colonisation pattern on a reconstructed human epidermis (RhE) by imaging techniques. Methods: Malassezia clinical isolates were previously isolated from volunteers with pityriasis versicolor and seborrhoeic dermatitis. Yeast of two strains of M furfur and M sympodialis were inoculated onto the SkinEthic™ RHE. The tissues were processed for light microscopy, wide‐field fluorescence microscopy and scanning electron microscopy. Results: Colonisation of the RhE surface with aggregates of Malassezia yeast entrapped in a multilayer sheet with variable amount of extracellular matrix was unveiled by imaging techniques following 24, 48, 72 and 96 hours of incubation. Whenever yeast were suspended in RPMI medium supplemented with lipids, the biofilm substantially increased with a dense extracellular matrix in which the yeast cells were embedded. Slight differences were found in the biofilm architectural structure between the two tested species with an apparently higher entrapment and viscosity in M furfur biofilm. Conclusion: Skin isolates of M furfur and M sympodialis were capable of forming biofilm in vitro at the epidermal surface simulating in vivo conditions. Following 24 hours of incubation, without added lipids, rudimental matrix was barely visible, conversely to the reported at plastic surfaces. The amount of biofilm apparently increased progressively from 48 to 96 hours. A structural heterogeneity of biofilm between species was found. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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19. Fungal Infections of the Hair
- Author
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Hay, Roderick J., Ólafsson, Jón Hjaltalín, editor, and Hay, Roderick James, editor
- Published
- 2016
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20. Microbiome: a new era in normal and pathological changes skin studies
- Author
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E. R. Araviiskaia and E. V. Sokolovskiy
- Subjects
микробиота кожи ,метагеномный анализ ,секвенирование ,атопический дерматит ,акне ,врожденный иммунитет ,адаптивный иммунитет ,skin microbiota ,methagenomic analysis ,sequencing ,acne ,seborrhoeic dermatitis ,rosacea ,atopic dermatitis ,innate immunity ,adaptive immunity ,Dermatology ,RL1-803 - Abstract
The paper contains review of studies on microbiota and cutaneous microbiome using modern techniques of methagenomic analysis. The existing data on microflora of normal skin and among the patients with acne, seborrhoeic dermatitis, rosacea atopic dermatitis are consequently analyzed. The interaction between microbiome and innate/adaptive immunity is presented The perspectives of knowledge on microbiome both in dermatology and cosmetology are pointed out.
- Published
- 2017
- Full Text
- View/download PDF
21. The role of nutrition in inflammatory pilosebaceous disorders: Implication of the skin‐gut axis.
- Author
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Maarouf, Melody, Platto, Jody F, and Shi, Vivian Y
- Subjects
- *
HIDRADENITIS suppurativa , *NUTRITION disorders , *ACNE , *NUTRITION , *DISEASES - Abstract
Nutrition plays a critical role in the manifestation and management of inflammatory pilosebaceous disorders. There is rich potential for insight into the impact of dietary effects on the pathophysiology of inflammatory pilosebaceous disorders including acne vulgaris, hidradenitis suppurativa, rosacea, and the closely related seborrhoeic dermatitis. Acne vulgaris and hidradenitis suppurativa are thought to have similar diet‐modulating pathogenic pathways. Western diet influences Acne vulgaris and hidradenitis suppurativa by increasing insulin and modulating FOX01/mTOR, resulting in over‐expression of cytokeratins, hyperproliferation of keratinocytes, and hypercornification of the follicular wall. Key receptors in rosacea are alternatively activated by UV radiation, hot beverages, spicy foods, vanilla, cinnamon, caffeine, alcohol, cold temperatures, and niacin‐ and formalin‐containing foods, to increase oedema and flushing, resulting in erythema, telangiectasia, and warmth, characteristic features of the condition. Seborrhoeic dermatitis, while not a follicular disorder, is closely related, and can be modulated by dietary influences, such as biotin and probiotics. This overview summarizes the role that nutrition plays on these disorders, and identifies dietary modifications as potential adjunctive therapies. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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22. Increased IL‐17‐expressing γδ T cells in seborrhoeic dermatitis‐like lesions of the Mpzl3 knockout mice.
- Author
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Wikramanayake, Tongyu C., Hirt, Penelope, Almastadi, Maram, Mitchell, Hunter, Tomic‐Canic, Marjana, Romero, Laura, Garcia, Denisse, and Strbo, Natasa
- Subjects
- *
T cells , *SEBORRHEIC dermatitis , *SKIN inflammation , *SKIN diseases , *CYTOKINES , *FLOW cytometry - Abstract
Seborrhoeic Dermatitis (SD) is a common inflammatory skin disorder, but its molecular pathogenesis remains elusive. Previously, we have established the Mpzl3 knockout (−/−) mice as a model for SD. In this study, we focused on early phases of skin inflammation and determined the cytokine profiles and identified immune cell types in the lesional skin in the Mpzl3 −/− mice. Using flow cytometry, we detected a significant increase of CD45+ leucocytes, CD3+ T lymphocytes and especially γδ T cells but not αβ T cells in the lesional skin compared to control. We also detected high levels of IL‐17 and determined that the γδ T cells were a major contributing source. CD3+ and γδ T cell localization in the skin was verified by indirect immunofluorescent staining. Since neither γδ T cells nor IL‐17 had been implicated in SD, our study provides novel insights into the role of MPZL3 in the pathogenesis of SD‐like skin inflammation. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
23. Light-emitting Diode Light Therapy for Facial Seborrhoeic Dermatitis: A Case Report.
- Author
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Fonseka, Sanjeewani, Heshani Narankotuwa, Kumudu Hasanka, and Jayarathne Bandara, Dilan Dileepa
- Subjects
- *
LIGHT emitting diodes , *PHOTOTHERAPY , *SKIN inflammation , *TREATMENT effectiveness , *PATHOGENESIS - Abstract
Seborrhoeic dermatitis (SD) is a chronic, relapsing, papulosquamous inflammatory itchy dermatoses. It manifests as erythematous papules, macules, or ill-defined flat plaques with varying levels of scaling and pruritus. The exact pathogenesis of this condition is not known but Malassezia yeasts, hormones (androgens), amount of sebum produced, and deranged immune response are known to play important roles in its development. There is a wide range of therapeutic options to treat SD but some patients do not respond to any of the treatments. Here, we report three patients with treatment-resistant facial SD, successfully treated with light-emitting diode light therapy (LED-LT). [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
24. The Lipase Activities of Malassezia Species Isolated from Seborrhoeic Dermatitis/Dandruff Patients
- Author
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Prasanna Honnavar, Arunaloke Chakrabarti, Ghandam S Prasad, Jillwin Joseph, Sunil Dogra, Sanjeev Handa, and Shivaprakash M Rudramurthy
- Subjects
lipase activity ,p-nitrophenylpalmitate ,seborrhoeic dermatitis ,Medicine - Abstract
Introduction: Malassezia a commensal yeast, can become pathogenic leading to different clinical forms of dermatosis. Being an obligatory lipophilic, the lipolytic enzymes produced by them help in their growth by obtaining useful lipids from the environment further contributing to the pathogenesis of dermatosis. There are no comparative reports concerning secreted lipase activities of Malassezia species associated with Seborrhoeic Dermatitis/Dandruff (SD/D). Aim: To analyse and compare lipase activities of Malassezia spp. isolated from SD/D patient’s lesional area and Healthy Controls (HC) and correlates this feature in pathogenesis of SD/D. Materials and Methods: Lipase activities of Malassezia species isolated from lesional area of SD/D patients and HC were analysed and compared. Extracellular proteins of Malassezia spp. were extracted from the Leeming and Notman agar after removing and weighing the yeast cells from the agar surface. The lipase activity was measured using an assay based on hydrolysis of p-Nitrophenylpalmitate (pNPP). ANOVA test and GraphPad were used for statistical analysis. Results: Malassezia furfur wet fungal weight was higher (1.1±0.13 g) compared to M. globosa (0.36±0.4 g) and M. restricta (0.26±0.4 g). The mean extracellular lipase activity of M. globosa (0.15 U) and M. restricta (0.18 U) was significantly higher than M. furfur (0.08 U) isolates (p
- Published
- 2018
- Full Text
- View/download PDF
25. Literature Review on History and Pharmacotherapy of Parkinson's Disease
- Author
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S. Rajaram and P. Supriya
- Subjects
education.field_of_study ,Pediatrics ,medicine.medical_specialty ,Parkinson's disease ,Deep brain stimulation ,business.industry ,medicine.medical_treatment ,Population ,Seborrhoeic dermatitis ,Disease ,Akathisia ,medicine.disease ,Dyskinesia ,Medicine ,medicine.symptom ,business ,education ,Depression (differential diagnoses) - Abstract
Introduction: Parkinson’s disease (PD) is a slowly progressive neurodegenerative disease characterized by: Pill rolling tremors, Akathisia (inability to sit still), Rigidity, Kinesis (akinesia, dyskinesia), Instable (stooped) posture, no arm swinging in rhythm with legs, Sialorrhea Oculogyric crisiseyes are held fixed for a variable length of time), Nervous depression, Involuntary tremors, Seborrhoea and Masked facial expression. Parkinson’s disease is a chronic, progressive, neurodegenerative disorder with an estimated prevalence of 31 to 328 per 100,000 people worldwide. It is estimated that more than 1 percent of the population over age 65 are afflicted with Parkinson’s disease; incidence and prevalence increase with age. There are numerous unanswered questions regarding the diagnosis and management of Parkinson’s disease. Surgical treatment for Parkinson’s disease is generally considered for patients who respond to medications but have intolerable side effects. Surgical options include ablative procedures, deep brain stimulation, and tissue transplantation. This review focused on History and management of Parkinson’s disease. The purpose of this literature review is to gain an understanding of the existing research relevant to history and pharmacotherapy of Parkinson’s disease. Conclusion: Pharmacological treatment of PD should be tailored to the individual patient. Drug therapy is not obligatory in early PD; many patients can be managed for a time with exercise and lifestyle interventions. For patients with mild symptoms, MAO-B inhibitors, amantadine, or (in younger patients) anticholinergics are reasonable choices.
- Published
- 2021
26. Seborrhoeic dermatitis and sebopsoriasis developing in patients on dupilumab: Two case reports.
- Author
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Al‐Janabi, Ali and Marsland, Alexander M.
- Subjects
- *
SKIN inflammation , *DIFFERENTIAL diagnosis , *DUPILUMAB - Abstract
Cutaneous adverse events to dupilumab can be varied; this necessitates keeping a broad differential diagnosis to identify seemingly paradoxical reactions. It may be possible to treat the adverse event concurrently without stopping dupilumab. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
27. Malassezia-Can it be ignored?
- Author
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Ambujavalli Balakrishnan Thayikkannu, Anupma Jyoti Kindo, and Mahalakshmi Veeraraghavan
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Malassezia ,pityriasis versicolor ,seborrhoeic dermatitis ,Dermatology ,RL1-803 - Abstract
Genus Malassezia comprises of 14 species of "yeast like fungi," 13 of which are lipophilic and 1 is nonlipophilic. They are known commensals and in predisposed individuals they commonly cause a spectrum of chronic recurrent infections. They rarely also cause serious illnesses like catheter-related blood stream infections, CAPD associated peritonitis etc., Though these fungi have been known to man for over 150 years, their fastidious nature and cumbersome culture and speciation techniques have restricted research. Since the last taxonomic revision, seven new species have been added to this genus. Their ability to evade the host immune system and virulence has increased the spectrum of the diseases caused by them. These agents have been implicated as causal agents in common diseases like atopic dermatitis recently. Though culture-based research is difficult, the new molecular analysis techniques and facilities have increased research in this field such that we can devote more attention to this genus to study in detail, their characteristics and their growing implications implications in the clinical scenario.
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- 2015
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28. Introduction: Malassezia Yeasts from a Historical Perspective
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Hay, Roderick J., Midgley, Gillian, Boekhout, Teun, editor, Mayser, Peter, editor, Guého-Kellermann, Eveline, editor, and Velegraki, Aristea, editor
- Published
- 2010
- Full Text
- View/download PDF
29. Pityriasis Versicolor and Other Malassezia Skin Diseases
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Erchiga, Vicente Crespo, Hay, Roderick J., Boekhout, Teun, editor, Mayser, Peter, editor, Guého-Kellermann, Eveline, editor, and Velegraki, Aristea, editor
- Published
- 2010
- Full Text
- View/download PDF
30. Malassezia Yeasts in Animal Disease
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Bond, Ross, Guillot, Jacques, Cabañes, F. Javier, Boekhout, Teun, editor, Mayser, Peter, editor, Guého-Kellermann, Eveline, editor, and Velegraki, Aristea, editor
- Published
- 2010
- Full Text
- View/download PDF
31. An HIV-Infected Man with Anal Pain, Anal Discharge, and Bleeding
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McMillan, Alexander and McMillan, Alexander
- Published
- 2010
- Full Text
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32. Comparative safety and efficacy of topical mometasone furoate with other topical corticosteroids.
- Author
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Spada, Fabrizio, Barnes, Tanya M., and Greive, Kerryn A.
- Subjects
- *
CORTICOSTEROIDS , *DERMATOLOGY , *DRUG side effects , *ANTIFUNGAL agents , *PHARMACOKINETICS - Abstract
Abstract: Derivatives of hydrocortisone, such as mometasone furoate, a (2′) furoate‐17 ester with chlorine substitutions at positions 9 and 21, have been designed to improve efficacy and reduce the incidence of adverse effects. An extensive literature search of MEDLINE, Embase and other databases was conducted to review the safety and efficacy of various formulations of topical mometasone furoate. Mometasone furoate exhibits high potency with greater anti‐inflammatory activity and a longer duration of action than betamethasone. In clinical trials, mometasone furoate shows comparable or significantly better efficacy, depending on the comparator, in all indications studied in both adults and children. It is well tolerated with only transient, mild to moderate local adverse effects. It is characterised by low systemic availability due to its high lipophilicity, low percutaneous absorption and rapid hepatic biotransformation, and consequently has no significant effect on the hypothalamic‐pituitary‐adrenal axis. The molecular biotransformation of mometasone furoate in the skin results in a lower affinity with dermal cells than epidermal cells, which contributes to its low atrophogenicity. Sensitisation to mometasone furoate is low. Overall, mometasone furoate is a highly efficacious potent corticosteroid with a low risk of both local and systemic adverse effects. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
33. Beyond dry eye: how co-morbidities influence disease phenotype in dry eye disease
- Author
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Anat Galor, Yonghoon Lee, and Minji Kim
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medicine.medical_specialty ,Meibomian gland ,Lacrimal gland ,Disease ,Article ,Fibromyalgia ,medicine ,Humans ,business.industry ,Neurotrophic keratitis ,Meibomian Glands ,Seborrhoeic dermatitis ,medicine.disease ,Dermatology ,eye diseases ,Ophthalmology ,Phenotype ,medicine.anatomical_structure ,Rosacea ,Tears ,Dry Eye Syndromes ,sense organs ,Eyelid ,Morbidity ,business ,Optometry - Abstract
Dry Eye Disease (DED) is a complex and multifactorial disorder of tear homoeostasis that results in pain, visual disturbance, and ocular surface damage. It is highly prevalent around the world and is associated with many co-morbidities that may contribute to or exacerbate symptoms and signs of disease and affect disease phenotype. However, DED is not one disease and can manifest with a variety of symptoms and/or signs. In this review, we discuss relationships between various co-morbidities and DED phenotypes. For example, individuals with immune mediated diseases, like Sjögren's Syndrome and Graft versus Host Disease, often present with aqueous tear deficiency (ADDE) in the setting of lacrimal gland dysfunction. Individuals with disorders that affect the periocular skin, like rosacea and seborrhoeic dermatitis, often present with evaporative dry eye (EDE) in the setting of eyelid and/or meibomian gland abnormalities. Individuals with pain related disorders, such as chronic pain syndrome and migraine, often present with ocular pain out of proportion to tear film abnormalities, often with accompanying corneal nerve hypersensitivity. Individuals with diabetes mellitus often present with an epitheliopathy in the setting of decreased sensation (neurotrophic keratitis). While not absolute, understanding relationships between co-morbidities and DED phenotypes can help tailor a therapeutic plan to the individual patient.
- Published
- 2021
34. Comparison of the skin lesions in patients with coronary artery disease at the time of admission in coronary care unit (CCU) and at discharge
- Author
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Amirhossein Akbari, Gita Faghihi, Fariba Iraji, and Ali Asilian
- Subjects
medicine.medical_specialty ,integumentary system ,business.industry ,Pressure sores ,Seborrhoeic dermatitis ,medicine.disease ,Dermatology ,Coronary artery disease ,Rosacea ,Intensive care ,Coronary care unit ,Medicine ,In patient ,business ,Skin lesion - Abstract
Background: Patients admitted in especial units such as coronary care unit (CCU) require intensive care for different aspects including skin problems. Here in this report we aimed to perform a survey on different skin lesions in patients admitted in CCU by the time of admission and when discharging. Methods: In this cross-sectional study, we had a survey on 200 patients admitted in CCU in AL-Zahra hospital, Isfahan. A dermatologist observed and examined each patients for any skin lesions by the time of admission and when discharging from CCU. Results: Here we showed that 15 percent of patients admitted in CCU have at least one skin lesion and also we indicated that seborrhea dermatitis and then rosacea have the most prevalence by the time of admission in CCU. Other skin lesions were acute skin failure. We also showed that prevalence of bed sore and pressure sores increased amazingly during admission. Conclusion: Rosacea, seborrhea dermatitis and drug allergic reactions after pressure sores are the most frequent skin lesions in CCU and there might be an association between rosacea and cardiovascular diseases.
- Published
- 2021
35. Seborrhoeic dermatitis in infancy
- Author
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Štěpánka Čapková
- Subjects
medicine.medical_specialty ,Environmental Engineering ,business.industry ,Medicine ,Seborrhoeic dermatitis ,business ,Dermatology - Published
- 2021
36. Global Burden, Incidence and Disability-Adjusted Life-Years for Dermatitis: A Systematic Analysis Combined With Socioeconomic Development Status, 1990–2019
- Author
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Shu-Zhuang Hong, Peng Wang, Bai-Cheng Yang, Chi-Yu Jia, Qingliang Zhao, Yi Xue, Gang Liu, Wu Bao, Jun Ren, Bin Yin, Chengchao Chu, and Jie Zhou
- Subjects
Microbiology (medical) ,medicine.medical_specialty ,business.industry ,Incidence ,Incidence (epidemiology) ,Immunology ,Disability-Adjusted Life Years ,Seborrhoeic dermatitis ,Atopic dermatitis ,medicine.disease ,Mental health ,Microbiology ,Dermatitis, Seborrheic ,Distress ,Infectious Diseases ,Socioeconomic Factors ,Environmental health ,Epidemiology ,medicine ,Global health ,Humans ,Quality-Adjusted Life Years ,business ,Contact dermatitis - Abstract
BackgroundDermatitis is an important global health problem that not only affects social interaction and physical and mental health but also causes economic burden. Health problems or distress caused by dermatitis may be easily overlooked, and relevant epidemiological data are limited. Therefore, a better understanding of the burden of dermatitis is necessary for developing global intervention strategies.MethodsAll data on dermatitis, including atopic dermatitis (AD), contact dermatitis (CD) and seborrhoeic dermatitis (SD), were obtained from the Global Burden of Disease 2019 (GBD2019) database. The extracted age-standardized incidence rates (ASIR) and disability-adjusted life-years (DALYs) rates (ASDR) data were analysed by stratification, including by sex, country or region, and sociodemographic index (SDI) indicators. Finally, we analysed the correlation between the global burden of dermatitis and socioeconomic development status.ResultsAccording to the GBD 2019 estimate, the ASIR and ASDR for the three major types of dermatitis in 2019 were 5244.3988 (95% CI 4551.7244–5979.3176) per 100,000 person-years and 131.6711 (95% CI 77.5876–206.8796) per 100,000 person-years. The ASIR and ASDR of atopic dermatitis, contact dermatitis and seborrhoeic dermatitis are: Incidence (95%CI,per 100,000 person-years), 327.91 (312.76-343.67), 3066.04 (2405.38-3755.38), 1850.44 (1706.25- 1993.74); DALYs (95%CI, per 100,000 person-years), 99.69 (53.09-167.43), 28.06 (17.62-41.78), 3.93 (2.24-6.25). In addition, among the three dermatitis types, the greatest burden was associated with AD. According to the ASDR from 1990 to 2019, the burden of dermatitis has exhibited a slow downward trend in recent years. In 2019, the ASIR showed that the USA had the greatest burden, while the ASDR showed that Asian countries (such as Japan, Mongolia, Kazakhstan, and Uzbekistan) and some European countries (France, Estonia) had the greatest burden. According to SDI stratification and the three major dermatitis types, high ASIR and ASDR corresponded to high SDI areas (especially for AD).ConclusionThe burden of dermatitis is related to socioeconomic development status, especially for AD, which is positively correlated with the SDI. The results based on GBD2019 data are valuable for formulating policy, preventing and treating dermatitis and reducing the global burden of dermatitis.
- Published
- 2022
- Full Text
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37. Topical pine tar: History, properties and use as a treatment for common skin conditions.
- Author
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Barnes, Tanya M and Greive, Kerryn A
- Subjects
- *
WOOD tar , *PINE , *SKIN disease treatment , *MEDICINAL plants , *DNA synthesis , *CELL cycle , *THERAPEUTICS - Abstract
Pine tar is the end product of pine wood carbonisation following distillation using extreme heat. An extensive literature search was conducted back to the 1950s for this review. Pine tar has been used in medicine for more than 2000 years to treat a range of skin conditions because of its soothing and antiseptic properties. Pine tar should not be confused with coal tar, which has been produced from coal for approximately a hundred years. Pine tar is thought to exert its effect by reducing DNA synthesis and mitotic activity, which promotes a return to normal keratinisation. In addition, pine tar has been shown to be antipruritic, antiinflammatory, antibacterial and antifungal. These properties make pine tar suitable for the topical treatment of eczema, psoriasis, seborrhoeic dermatitis and other dry, itchy, flaky or inflamed skin conditions. Topical products available over-the-counter in Australia today contain up to 2.3% pine tar, and come in several different formulations that can be used on the entire body, including the face. Modern day pine tar is manufactured with increased purity to eliminate toxic phenol and carcinogenic components, which have been of concern in the past. Primary irritation is uncommon. In conclusion, the long experience with topical pine tar therapy and its worldwide usage, together with the evidence presented in this review, suggests that pine tar is an effective treatment with minimal safety risk. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
38. Two Consecutive Standardized Skin Surface Biopsies: An Improved Sampling Method to Evaluate Demodex Density as a Diagnostic Tool for Rosacea and Demodicosis.
- Author
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FORTON, Fabienne M. N. and DE MAERTELAER, Viviane
- Subjects
- *
BIOPSY , *DERMATOLOGY , *DERMATOLOGISTS , *PHYSICIAN practice patterns , *ROSACEA - Abstract
Diagnosing papulopustular rosacea is not always straightforward; no specific diagnostic test is currently available. A high density of Demodex mites is consistently observed in this condition. This retrospective study assesses an improved method for evaluating Demodex density among 1,044 patients presenting to our dermatology practice. The skin was cleaned with ether and Demodex densities were measured in 2 consecutive standardized skin surface biopsies taken from the same site. Mean densities in patients with rosacea and demodicosis were much higher than those in healthy controls and patients with other facial dermatoses. The optimal cut-off values for the 2 biopsies were combined and the resultant criterion (presence of a first biopsy density > 5 Demodex/cm2 or a second biopsy density > 10 Demodex/cm2) enabled confirmation of a diagnosis of rosacea or demodicosis with a sensitivity of 98.7% and specificity of 95.5%, making this a valuable diagnostic tool for dermatologists in routine clinical practice. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
39. Rosacea
- Author
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Powell, F. C., Katsambas, Andreas D., editor, and Lotti, Torello M., editor
- Published
- 2000
- Full Text
- View/download PDF
40. Pemphigus Foliaceus
- Author
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Harman, K. E., Black, M. M., Katsambas, Andreas D., editor, and Lotti, Torello M., editor
- Published
- 2000
- Full Text
- View/download PDF
41. Antidandruff
- Author
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Haustein, U.-F., Nenoff, P., Elsner, P., editor, Maibach, Howard I., editor, and Merk, Hans F., editor
- Published
- 1999
- Full Text
- View/download PDF
42. Seborrhoeic Dermatitis and Dandruff, and Its Treatment With Ciclopirox Shampoo
- Author
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Shuster, S. and Shuster, Sam, editor
- Published
- 1999
- Full Text
- View/download PDF
43. Ciclopirox Gel Treatment of Scalp Seborrheic Dermatitis
- Author
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Abrams, B. B., Cherill, R. J., Ramaswamy, R., Katz, H. I., and Shuster, Sam, editor
- Published
- 1999
- Full Text
- View/download PDF
44. Non-atopic dermatitis
- Author
-
David Orton
- Subjects
medicine.medical_specialty ,business.industry ,Patch test ,Seborrhoeic dermatitis ,General Medicine ,Atopic dermatitis ,medicine.disease ,Dermatology ,03 medical and health sciences ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Discoid eczema ,medicine ,Irritant contact dermatitis ,Non atopic ,030212 general & internal medicine ,business ,Allergic contact dermatitis - Abstract
The terms ‘eczema’ and ‘dermatitis’ are used interchangeably to describe an inflammatory skin disorder with different clinical and histological appearances according to duration (acute versus chronic) and cause. ‘Non-atopic dermatitis’ encompasses various kinds of dermatitis that are usually classified by appearance, such as discoid eczema, or body site, such as seborrhoeic dermatitis. Attempts at classification are often unsatisfactory and different kinds of dermatitis can coexist and overlap with atopic dermatitis. The role of irritant and allergic contact factors should be considered in all cases and patch tests undertaken where allergic contact dermatitis is suspected or cannot be excluded.
- Published
- 2021
45. Sociodemographic characteristics and spectrum of Malassezia species in individuals with and without seborrhoeic dermatitis/dandruff: A comparison of residents of the urban and rural populations
- Author
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Sanjeev Handa, P V M Lakshmi, Manpreet Dhaliwal, Sunil Dogra, Arunaloke Chakrabarti, Prasanna Honnavar, and Shivaprakash M Rudramurthy
- Subjects
Adult ,Male ,Rural Population ,medicine.medical_specialty ,Adolescent ,Urban Population ,Population ,India ,Severity of Illness Index ,Young Adult ,030207 dermatology & venereal diseases ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Dermatomycoses ,Humans ,Prospective Studies ,Child ,education ,Demography ,0303 health sciences ,education.field_of_study ,Malassezia ,Geography ,integumentary system ,biology ,030306 microbiology ,business.industry ,Seborrhoeic dermatitis ,General Medicine ,Dandruff ,biology.organism_classification ,medicine.disease ,Dermatology ,Shampoo ,Infectious Diseases ,medicine.anatomical_structure ,Hair loss ,Scalp ,Itching ,Female ,medicine.symptom ,business - Abstract
Seborrhoeic dermatitis/dandruff (SD/D) is a common, persistent, relapsing inflammatory condition affecting the areas rich in sebaceous glands. SD/D is widely prevalent in India but Malassezia species implicated are not well studied. To estimate the prevalence and spectrum of Malassezia species causing SD/D and understand the sociodemographic characteristics of SD/D in rural and urban populations, a total of 200 SD/D patients and 100 healthy controls (HC) from both rural and urban backgrounds were enrolled in this study. SD/D severity was clinically graded as mild, moderate, severe, and very severe. The isolates were identified by phenotypic characters and confirmed by ITS2 PCR-RFLP and sequencing of the ITS region of rDNA. Severe (59%) and very severe (71%) form of SD/D was higher in the rural population compared to the urban population (P = .004). The isolation rate of Malassezia was significantly higher in overall SD/D patients scalp (82%) compared to HC (67%) (P = .005). From the scalp of SD/D patients, M. globosa (36.2%) was predominantly isolated followed by M. restricta (31.3%), M. furfur (15.7%), a mixture of M. globosa and M. restricta (12%) or M. arunalokei (4.8%). Similarly, M. globosa (49.3%) was predominately isolated from the scalp of HC followed by M. restricta (22.4%). M. restricta was significantly higher in the scalp of SD/D patients compared to HC and/or nasolabial fold of both SD/D patients and HC (P = .0001). Our findings indicate that M. restricta has a high association with SD/D. More severe disease frequency was observed in the rural population. Precis Dandruff is associated with Malassezia restricta and very severe cases are higher in rural population, probably due the poor hygiene. Moderate to severe hair loss and itching were strongly associated with dandruff. Use of soaps to cleanse scalp appears to be better than shampoo in preventing dandruff.
- Published
- 2020
46. Melanocortin 5 receptor signaling pathway in health and disease
- Author
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Rujun Gong, Xuejing Guan, Yahong Xu, and Rong Zhou
- Subjects
Central Nervous System ,Article ,Energy homeostasis ,Uveitis ,Cellular and Molecular Neuroscience ,Melanocortin receptor ,Acne Vulgaris ,Animals ,Humans ,Medicine ,Receptor ,Molecular Biology ,Melanocortin 5 receptor ,Melanocortins ,Pharmacology ,business.industry ,Receptors, Melanocortin ,Seborrhoeic dermatitis ,Cell Biology ,Dermatitis, Seborrheic ,Molecular Medicine ,Melanocortin ,Signal transduction ,business ,Neuroscience ,Signal Transduction - Abstract
Melanocortin hormone system plays a key role in maintaining the homeostasis of our body via their neuro-immune-endocrine activities and regulates a diverse array of physiological functions, including melanogenesis, inflammation, immunomodulation, adrenocortical steroidogenesis, hemodynamics, natriuresis, energy homeostasis, sexual function, and exocrine secretion. The pathobiologic actions of all melanocortins are conveyed by melanocortin receptors. As the last melanocortin receptor to be cloned and characterized, melanocortin receptor 5 (MC5R) is widely expressed in both central nervous system and a number of peripheral organ systems in man. However, the exact effect of the MC5R mediated melanocortinergic signaling remains largely uncertain. Owing to the recent advances in developing highly selective peptidomimetic agonists and antagonists of MC5R and also to studies in MC5R knockout animals, our understanding of MC5R pathobiology has been greatly expanded and strengthened. Evidence suggests that MC5R plays a key role in governing immune reaction and inflammatory response, and is pivotal for the regulation of sexual behavior, thermoregulation, and exocrine secretion, like sebogenesis, lacrimal secretion and release of sex pheromones. As such, recent translational efforts have focused on developing novel sebum-suppressive therapies for seborrhoea and acne vulgaris based on antagonizing MC5R. Conversely, selective MC5R agonists have demonstrated promising beneficial effects in immune-mediated diseases, metabolic endocrinopathies and other disease conditions, such as glomerular diseases and dry eyes, skin and mouth. Thus, MC5R-mediated signaling is essential for health. Therapeutic targeting of MC5R represents a promising and pragmatic therapeutic strategy for diverse diseases. This review article delineates the biophysiology of MC5R-mediated biophysiology of the melanocortin hormone system, discusses the existing data on MC5R-targeted therapy in experimental disease models, and envisages the translational potential for treating human diseases.
- Published
- 2020
47. Neuroendocrinology and neurobiology of sebaceous glands
- Author
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Marlon R. Schneider, Xinhong Lim, Ewan A. Langan, Maurice A.M. van Steensel, Klaus Göbel, Ralf Paus, R. Clayton, David M. Ansell, Mauro Picardo, and Ivo J. H. M. de Vos
- Subjects
0106 biological sciences ,Nervous system ,Sebaceous gland ,Hypothalamo-Hypophyseal System ,medicine.medical_specialty ,Dopamine ,Thyroid Gland ,Adrenocorticotropic hormone ,Neuroendocrinology ,Biology ,010603 evolutionary biology ,01 natural sciences ,General Biochemistry, Genetics and Molecular Biology ,Sebaceous Glands ,03 medical and health sciences ,Somatomedins ,Skin Physiological Phenomena ,Internal medicine ,Peripheral Nervous System ,medicine ,Animals ,Humans ,Skin ,030304 developmental biology ,0303 health sciences ,Stem Cells ,Brain ,Seborrhoeic dermatitis ,Skin appendage ,Neurosecretory Systems ,Prolactin ,Sebum ,medicine.anatomical_structure ,Endocrinology ,Growth Hormone ,General Agricultural and Biological Sciences ,Neurohormones - Abstract
The nervous system communicates with peripheral tissues through nerve fibres and the systemic release of hypothalamic and pituitary neurohormones. Communication between the nervous system and the largest human organ, skin, has traditionally received little attention. In particular, the neuro-regulation of sebaceous glands (SGs), a major skin appendage, is rarely considered. Yet, it is clear that the SG is under stringent pituitary control, and forms a fascinating, clinically relevant peripheral target organ in which to study the neuroendocrine and neural regulation of epithelia. Sebum, the major secretory product of the SG, is composed of a complex mixture of lipids resulting from the holocrine secretion of specialised epithelial cells (sebocytes). It is indicative of a role of the neuroendocrine system in SG function that excess circulating levels of growth hormone, thyroxine or prolactin result in increased sebum production (seborrhoea). Conversely, growth hormone deficiency, hypothyroidism, and adrenal insufficiency result in reduced sebum production and dry skin. Furthermore, the androgen sensitivity of SGs appears to be under neuroendocrine control, as hypophysectomy (removal of the pituitary) renders SGs largely insensitive to stimulation by testosterone, which is crucial for maintaining SG homeostasis. However, several neurohormones, such as adrenocorticotropic hormone and α-melanocyte-stimulating hormone, can stimulate sebum production independently of either the testes or the adrenal glands, further underscoring the importance of neuroendocrine control in SG biology. Moreover, sebocytes synthesise several neurohormones and express their receptors, suggestive of the presence of neuro-autocrine mechanisms of sebocyte modulation. Aside from the neuroendocrine system, it is conceivable that secretion of neuropeptides and neurotransmitters from cutaneous nerve endings may also act on sebocytes or their progenitors, given that the skin is richly innervated. However, to date, the neural controls of SG development and function remain poorly investigated and incompletely understood. Botulinum toxin-mediated or facial paresis-associated reduction of human sebum secretion suggests that cutaneous nerve-derived substances modulate lipid and inflammatory cytokine synthesis by sebocytes, possibly implicating the nervous system in acne pathogenesis. Additionally, evidence suggests that cutaneous denervation in mice alters the expression of key regulators of SG homeostasis. In this review, we examine the current evidence regarding neuroendocrine and neurobiological regulation of human SG function in physiology and pathology. We further call attention to this line of research as an instructive model for probing and therapeutically manipulating the mechanistic links between the nervous system and mammalian skin.
- Published
- 2020
48. Occurrence of Malassezia Spp. on Healthy Human Skin
- Author
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E. Böhmová, M. Harčárová, E. Čonková, P. Váczi, and Z. Malinovská
- Subjects
Veterinary medicine ,healthy skin ,yeasts ,Folliculitis ,Human skin ,Disease distribution ,occurrence ,Microbiology ,03 medical and health sciences ,Age groups ,malassezia ,man ,Psoriasis ,SF600-1100 ,medicine ,030304 developmental biology ,0303 health sciences ,biology ,integumentary system ,030306 microbiology ,Seborrhoeic dermatitis ,General Medicine ,Atopic dermatitis ,medicine.disease ,biology.organism_classification ,Malassezia - Abstract
The genus Malassezia currently includes seventeen species that have been isolated from healthy and diseased human and other animal skin. Malassezia are implicated in a range of cutaneous diseases in humans: pityriasis versicolor, atopic or seborrheic dermatitis, dandruff, folliculitis and psoriasis. The outbreak of the disease depends on the interaction between the host immune system and Malassezia species. Malassezia stimulates both the cellular and humoral immune response in humans. Although Malassezia species have been associated with various dermatological diseases in people, the detailed pathological role of Malassezia remains obscured. Malassezia yeasts require lipids for their growth and therefore to a greater extent they colonize the sites with more sebaceous glands. The ecosystem on skin is complex and its balance depends on several factors. The aim of this study was to determine the presence of Malassezia yeasts in clinically normal skin of 42 healthy, randomly selected individuals of different ages. In the group of people examined, up to 30 persons (71.4 %) represented by children, adults and the elderly were positive to Malassezia yeasts. It has been shown that the back is an area with a higher incidence (66.7 %) of observed yeast compared to the head (40.5 %).
- Published
- 2019
49. The Evolution of Lid Margin Changes in Blepharitis
- Author
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Bron, A. J., Tiffany, J. M., and Lass, Jonathan H., editor
- Published
- 1997
- Full Text
- View/download PDF
50. Pattern of skin diseases among dental and nursing students in a tertiary care centre
- Author
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S. Sakthivel Murugan, Vijaya Bharathi, Nivin Simon, Neetha Latha, and S. Rajagopal
- Subjects
education.field_of_study ,integumentary system ,business.industry ,Cross-sectional study ,media_common.quotation_subject ,Population ,Seborrhoeic dermatitis ,medicine.disease ,Tertiary care ,medicine.anatomical_structure ,Nursing ,Scalp ,Seborrheic dermatitis ,medicine ,Worry ,business ,education ,Acne ,media_common - Abstract
Introduction: Adolescents bother more about their appearance. Certain skin diseases are common in this particular population (seborrheic dermatitis, acne vulgaris and hair fall etc.) which led them to worry and upset. To assess the integrity of the problem we conducted a study among the students of dental and nursing college adjacent to our institution. Aims and Objectives: To find out the pattern of occurrence of skin diseases among dental and nursing students in a tertiary care centre. Materials and Methods: A cross sectional study was conducted among nursing and dental students adjacent to our institution. Full screening for skin lesion was done among the study subjects. Results: Out of the 561 study subjects 423 had skin lesions: In these majority of the subjects had seborrhoeic dermatitis (including scalp and face). Conclusion: This study help to assess their general health status as skin is the mirror of systemic diseases and also to frame the guidelines and hygienic measures be followed by the students in similar situation in future. Keywords: Seborrheic dermatitis, Screening, Acne vulgaris.
- Published
- 2021
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