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BackgroundDue to the COVID-19 outbreak, hygiene regulations have been intensified and hand sanitatio n has gained special attention. ObjectiveTo investigate the onset of hand eczema during the COVID-19 pandemic in health care workers (HCWs) directly involved in intensive care of COVID-19 patients and HCWs without direct contact. Hereby, we aim at increasing awareness with regard to occupational hand eczema and preventive measures that can be undertaken. MethodsA survey was distributed amongst 114 HCWs at a single surgical site and at a COVID-19 intensive care unit of the university hospital LMU Munich, Germany. Participants were questioned with regard to the daily frequency of hand hygiene prior to and during the pandemic.Participants self-reported onset of hand eczema and associated symptoms. ResultsOur study revealed a significant increase of hand washing, disinfection and use of hand cream across all participants (P-value<.001), regardless of having direct contact with COVID-19 patients. A high prevalence of symptoms associated with acute hand dermatitis was found in 90.4% across all HCWs, whereas hand eczema itself was underreported (14.9%). ConclusionThe increase of hand sanitation during the COVID-19 pandemic impairs the skin of the hands across all HCWs, independent of direct intensive care of affected patients.

Ionizing radiation is a known human carcinogen that can induce a variety of biological effects depending on the physical nature, duration, doses and dose-rates of exposure. However, the magnitude of health risks at low doses and dose-rates (below 100mSv and/or 0.1mSvmin(-1)) remains controversial due to a lack of direct human evidence. It is anticipated that significant insights will emerge from the integration of epidemiological and biological research, made possible by molecular epidemiology studies incorporating biomarkers and bioassays. A number of these have been used to investigate exposure, effects and susceptibility to ionizing radiation, albeit often at higher doses and dose rates, with each reflecting time-limited cellular or physiological alterations. This review summarises the multidisciplinary work undertaken in the framework of the European project DoReMi (Low Dose Research towards Multidisciplinary Integration) to identify the most appropriate biomarkers for use in population studies. In addition to logistical and ethical considerations for conducting large-scale epidemiological studies, we discuss the relevance of their use for assessing the effects of low dose ionizing radiation exposure at the cellular and physiological level. We also propose a temporal classification of biomarkers that may be relevant for molecular epidemiology studies which need to take into account the time elapsed since exposure. Finally, the integration of biology with epidemiology requires careful planning and enhanced discussions between the epidemiology, biology and dosimetry communities in order to determine the most important questions to be addressed in light of pragmatic considerations including the appropriate population to be investigated (occupationally, environmentally or medically exposed), and study design. The consideration of the logistics of biological sample collection, processing and storing and the choice of biomarker or bioassay, as well as awareness of potential confounding factors, are also essential.

Background Since the outbreak of SARS-CoV-2, authorities have preached the importance of personal hygiene, including hand washing and disinfection. Objective To evaluate changes in the frequency of hand washing and hand care, the onset of hand eczema (HE) and risk factors associated with HE since the outbreak of SARS-CoV-2 in Munich in January 2020. Materials & Methods All dermatologic outpatients at the university hospital between April 6 and April 19 were asked to complete a structured questionnaire. Results Data of 512 patients with a median age of 49 years (243 females, 267 males) were analysed. The frequency of hand washing and hand disinfection increased after the outbreak of SARS-CoV-2 ( p < 0.001, respectively). While symptoms associated with HE were reported by 29.9% (149/499) of patients, the actual diagnosis of HE was reported less frequently by 11.2% (53/473) with a median duration of 120 days. Frequent hand disinfection ( p = 0.039), atopic dermatitis ( p = 0.006) and young age ( p = 0.0499) were identified as risk factors for symptoms of HE. Hand care was performed more frequently during the pandemic than before ( p < 0.001). A high frequency of hand care during the pandemic was not significantly associated with symptoms of HE ( p = 0.172), but was associated with self-recognition of HE symptoms ( p = 0.002). Conclusion After the outbreak of SARS-CoV-2, the frequency of hand hygiene measures increased. A considerably high prevalence of HE symptoms was associated with frequent hand disinfection, atopic dermatitis and young age. Awareness of HE should be raised in order for preventive measures to be taken earlier.

An easy, fast and reliable method was developed to screen hundreds of Epstein-Barr virus-transformed cell lines (lymphoblastoid cell lines, LCLs) for radiation sensitivity that were generated from lymphocytes isolated from young lung cancer patients. The WST-1 test explores the metabolic activity of the mitochondria as an indicator for the vital status of cells. Cell proliferation as well as indirect cell death can be quantified by this method on a large scale in microtiter plates. Cell survival was measured at 24- and 48-h post-irradiation with 10 Gy ((137)Cs source) by the WST-1 assay and Trypan blue staining. To set up the experimental screening conditions and to establish a positive and a negative control, an ATM-mutated cell line from a radiation-sensitive ATM patient and an ATM proficient cell line from a healthy brother were compared. An optimal differentiation between the two cell lines was demonstrated for 10 Gy and 24- and 48-h cell growth after irradiation. Upon screening 120 LCLs of young lung cancer patients under these conditions, 5 of them were found to be radiation sensitive to a high degree of statistical significance. The results have been confirmed by a second laboratory by means of Trypan blue testing. The WST-1 test represents an efficient and reliable method by means of screening for radiation-sensitive cell lines.