[Renaissance of mouse favus : Retrospective analysis of Trichophyton quinckeanum infections at Jena University Hospital in the period 2015-2020]

The number of Trichophyton quinckeanum infections has increased significantly in recent years. In 2020 in particular, the number of cases increased fivefold compared to 2015. Infections multiplied, especially in the second half of the year, which correlated with the upsurge in field mouse populations. Typical vectors are mice and rats as well as dogs and cats, which hunt the rodents. The animals are usually asymptomatic. In humans, on the other hand, the course is usually more inflammatory corresponding to other zoophilic mycoses. Typical clinical manifestations of the infections are tinea corporis and tinea capitis. Treatment of T. quinckeanum infections is similar to other dermatophyte infections, depending on the severity, location and age of the patient as well as the immune status, previous illnesses and medication. The duration of local therapy should be at least 4 weeks and continued for up to 14 days after the normalization of the skin presentation. Systemic treatment should take place with terbinafine 250 mg once a day orally (in adults). Alternatives are itraconazole, fluconazole and griseofulvin. Only the preparation griseofulvin, which is no longer available in Germany, is approved for children. Alternatively, terbinafine, itraconazole or fluconazole can also be used in children as an "off-label" treatment in an individual healing attempt.

95 Jahre Universitäts-Hautklinik Jena: Geschichte und Gegenwart

Anlässlich des 95-jährigen Jubiläums der Universitäts-Hautklinik Jena beleuchtet dieser Beitrag die historische Entwicklung des Hauses in den verschiedenen politischen Systemen des letzten Jahrhunderts sowie die aktuelle Situation der Klinik als Teil des Universitätsklinikums Jena. Verschiedene Klinikleitungen in der Vergangenheit prägten die Ausrichtung des Hauses in Bezug auf Therapie und Forschung und setzten Schwerpunkte auf Themen wie Phototherapie, Autoimmunerkrankungen, Dermatoonkologie, Andrologie und Biomaterialforschung. Die Universitäts-Hautklinik vereint neben hochqualitativer Patientenversorgung und Lehre umfangreiche Forschungsaktivitäten.

[When sunscreens do not help: allergic contact dermatitis to UV filters]

Ultraviolet (UV) filters may cause allergic and more frequently photoallergic contact dermatitis. Therefore, a photopach test should always be performed in case of a suspected contact sensitivity to UV filters. We report a case of a 65-year-old woman with a recurrent erythema of the face and décolleté after sun exposure despite application of a sunscreen. The (photo)patch test revealed a contact sensitivity to the UV filter butyl-methoxybenzoylmethane. Treatment with a topical glucocorticoid and avoidance of the particular UV filter led to a rapid improvement.

Noninvasive monitoring of plant-based formulations on skin barrier properties in infants with dry skin and risk for atopic dermatitis

Background

Dry skin and the associated impaired epidermal barrier function are postulated to constitute a major element in the development of atopic dermatitis.

Objective

The aim of this study was to evaluate the effect of two plant-based formulations on the epidermal barrier function in a defined cohort of infants with a predisposition for atopic dermatitis.

Methods

Over a period of 16 weeks, 25 infants who were ages 3 to 12 months and had an atopic predisposition and dry skin received two emollients that contained pressed juice of the ice plant. The infants received both cream and lotion on the forearm, only cream on the face, and only lotion on the leg. Stratum corneum hydration (SCH), transepidermal water loss (TEWL), skin surface pH, and sebum were assessed on the infants’ forehead, leg, and forearm. The Scoring Atopic Dermatitis (SCORAD) index was used for the clinical assessment.

Results

SCH significantly increased in all body regions that were assessed. The forearm and leg revealed stable levels of pH and TEWL, but a decline in pH (week 16) and TEWL (week 4) was noted on the forehead. At week 16, sebum levels were lower on the forehead compared with those at baseline. SCORAD scores improved significantly during the study.

Conclusion

A daily application of both emollients was associated with increased SCH levels and a stable course of TEWL, pH, and sebum on the forehead except for the forehead when compared with the forearm and leg. Clinically, improved SCORAD scores were noted.

Relation between skin micro-topography, roughness, and skin age

BACKGROUND

The topography of the skin surface consists of lines, wrinkles, and scales. Primary and secondary lines form a network like structure that may be identified as polygons. Skin surface roughness measurements are widely applied in dermatological research and practice but the relation between roughness parameters and their anatomical equivalents are unclear. This study aimed to investigate whether the number of closed polygons (NCP) per measurement field can be used as a reliable parameter to measure skin surface topography. For this purpose, we analysed the relation between skin surface roughness parameters and NCP in different age groups.

METHODS

Images of the volar forearm skin of 38 subjects (14 children, 12 younger, and 12 older adults) were obtained with the VisioScan VC98. The NCP was counted by three independent researchers and selected roughness parameters were measured. Interrater reliability of counting the number of closed polygons and correlations between NCP, roughness parameters, and age were calculated.

RESULTS

The mean NCP/mm² in children was 3.1 (SD 1.1), in younger adults 1.0 (SD 0.7), and in older adults 1.0 (SD 0.9). The interrater reliability was 0.9. A negative correlation of NCP/mm² with age was observed, whereas measured roughness parameters were positively associated with age. NCP/mm² was weakly related to skin roughness.

CONCLUSION

The NCP/mm² is a reproducible parameter for characterizing the skin surface topography. It is proposed as an additional parameter in dermatological research and practice because it represents distinct aspects of the cutaneous profile not covered by established roughness parameters.