Biomedical subjects

Eva Scharrer

Publications and source records attributed to Eva Scharrer.

4 recordsLinked to original sources

PubMed2005

Contact urticaria to giraffe hair.

BACKGROUND: Immediate-type hypersensitivity to animal proteins is a common problem in people occupationally exposed to animals. METHODS: A 19-year-old female working as a voluntary zookeeper in her off-time suffered from hives on her forearms following contact to the fur of a giraffe. For diagnostic evaluation, skin prick tests, assessment of specific serum IgE antibodies, and basophil activation tests were performed. RESULTS: Skin prick tests with a standard series of common aeroallergens were positive for various pollens. Prick testing with native materials was positive for extracts of hair from two different giraffe subspecies in the patient, but not in control subjects. By CAP-FEIA, no specific serum IgE antibodies to dander of a large variety of animals were found in the patient. In the basophil activation test, expression of the activation marker CD63 was induced by extract of giraffe hair on the cells from the patient, but not on those from unaffected controls. CONCLUSIONS: This patient suffers from an 'exotic' immediate-type contact allergy to giraffe hair.

Adult↗

PubMed2005

The physical and biological doses of methacholine are different for Mefar MB3 and Jaeger APS sidestream nebulizers.

BACKGROUND: Within a study on respiratory symptoms in rural areas, we used the European Community Respiratory Health Survey methacholine challenge protocol. For quicker and more reliable handling, we had to change the nebulizer in the bronchial challenge system from Mefar model MB3 (Bovezzo, Italy) to Jaeger APS Sidestream (similar to Mefar; Würzburg, Germany). Therefore, we compared the physical properties of the two systems, adapted the challenge protocol, and compared the results of both systems in subjects with and without airway hyperresponsiveness to methacholine. METHOD: The physical properties of both systems were characterized by the residual method indicating a similar particle size distribution and an average output of 6 muL/s for Mefar MB3 and 1.25 muL/s for APS Sidestream. In the comparison study, 34 subjects were included. Airway responsiveness was quantified by provocative dose of methacholine causing a 20% fall in FEV(1). RESULTS: A significant difference was found between the two challenge systems (p =0.004, McNemar test). Nine subjects reached a 20% drop in FEV(1) with the APS Sidestream only. The FEV(1) dropped by > 20% using either system in eight subjects. In 17 subjects, none of the two systems caused a 20% decrease in FEV(1). CONCLUSION: Even if the physical dose is determined with elaborate methods, the biological dose may vary between two nebulizer systems, causing incomparable outcomes for subjects tested with different systems.

Adult↗

PubMed2005

Concentrations of dust, allergens and endotoxin in stables, living rooms and mattresses from cattle farmers in southern Bavaria.

Agricultural work is considered to be a major risk factor for occupational diseases. In particular, allergic reactions to cow dander cause numerous cases of airway disorders. We measured the concentration of allergens (e.g. Bos d2, Der p1) and endotoxin in the stables, living-rooms and mattresses of 46 farmers with a diagnosis of occupational asthma or allergic rhinitis caused by cow dander allergen. The concentration of cow dander allergen was highest in stables (median 20,400 microg/g) but also noticeable in dust samples from living-rooms (median 155 microg/g) and mattresses (median 195 microg/g). The sensitization threshold (20-50 microg/g) was exceeded in most cases. Thus, allergen transport from the stables to bed must be prevented by optimizing the hygiene of farmers and family members.

Adult↗

PubMed2002

Web-based training in occupational medicine.

OBJECTIVES: The aim of our project was to develop and evaluate an interactive computer-based approach to teach medical students in occupational medicine. To enhance interest in occupational medicine the major focus was on clinical and practical aspects of occupational medicine. METHODS: The computer program was designed in HTML and JavaScript. It presents a guided tour of the patient's case history followed by information on practice and theory of occupational medicine. The program was integrated into the curriculum during the summer term of 1999 and the following winter term. To assess the effectiveness and acceptability of the program we asked students to rate the program on an 18-item questionnaire. RESULTS: Overall, 287 students participated in the evaluation of the program. The participants highly recommended the program structure and had no difficulties in handling the program. This was independent of the computer experience of the students. The evaluation showed that it was possible to enhance interest in occupational medicine by using "virtual patients". CONCLUSION: The program represents a student-orientated learning tool that points out clinical and practical aspects of occupational medicine. The availability via the Internet allows the application as a self-learning tool as well as a teaching tool for the medical curriculum.

Humans↗