Staphylococcus aureus strain CH-91, isolated from a broiler chicken with atopic dermatitis, has a highly proteolytic phenotype that is correlated with the disease. We describe the isolation and biochemical and molecular characterization of the AI-type lantibiotic BacCH91 from S. aureus CH-91 culture medium. The bacteriocin was purified using a three-stage procedure comprising precipitation with ammonium sulfate, extraction with organic solvents, and reversed-phase HPLC. The BacCH91 peptide is thermostable and highly resistant to cleavage by both prokaryotic and eukaryotic peptidases. The MIC for the Gram-positive bacteria ranged from 2.5 nM for Microococcus luteus through 1.3–6.0 μM for staphylococcal strains up to more than 100 μM for Lactococcus lactis. BacCH91 was ineffective against the Gram-negative strains tested at the maximal concentration (100 μM). The amino acid sequence of BacCH91 is similar to that of epidermin and gallidermin. The encoding gene (bacCH91) occurred in two allelic variants distinguishable in the restriction fragment length polymorphism assay. Variant I, identified in S. aureus CH-91, dominated in S. aureus strains of poultry origin, although strains with variant II were also identified in this group. S. aureus strains of human origin were characterized exclusively by variant II.Electronic supplementary materialThe online version of this article (doi:10.1007/s00253-012-4578-y) contains supplementary material, which is available to authorized users.

Love is a universal experience that most people desire. A serious, long-term, and stigmatized illness makes entering and maintaining close relationships difficult, however. Ten persons, who have been diagnosed with schizophrenia, and lived with their illness for between years and decades of their lifetimes, shared their stories. They reported how the illness has influenced their emotional experiences regarding love and their intimate relationship experiences. We present here a qualitative interpretative phenomenological analysis (IPA) of their narratives. This analysis has been done with an explicit intention to give voice to the patient's perspective. The results highlight how illness adjustment and hospitalizations have an alienating effect on relationships through stigmatization and self-stigmatization; how illness creates psychological obstacles to love, such as diminished trust toward oneself and others; and how long-term patients experience practical difficulties in creating and sustaining relationships, such as poverty. Moreover, we show how patients experience changes in sexuality and the risks involved in it and discuss possible coping strategies from their perspectives.