Β-lactam antibiotic reactions to any β-lactam antibiotic may occur in up to 10% of patients receiving that agent (a small fraction of which are truly IgE-mediated allergic reactions, see amoxicillin rash). Anaphylaxis will occur in approximately 0.01% of patients. There is perhaps a 5%-10% cross-sensitivity between penicillin-derivatives, cephalosporins, and carbapenems; but this figure has been challenged by various investigators. Nevertheless, the risk of cross-reactivity is sufficient to warrant the contraindication of all β-lactam antibiotics in patients with a history of severe allergic reactions (urticaria, anaphylaxis, interstitial nephritis) to any β-lactam antibiotic. A Jarisch–Herxheimer reaction may occur after initial treatment of a spirochetal
The Teacher Who Was Not To Be of Music. In his letter Thommessen chastised Paus for his tonal music. A long monologue on why Paus has misunderstood everything about music ends with the words "I do not want any more verbal contact with you." At the time the opera monologue premiered, the "Teacher" in the monologue remained anonymous. The monologue played an important role in an extensive debate on musical aesthetics in the music journal "Ballade" in 2015, during which the formerly anonymous "Teacher" was revealed by Paus to be Olav Anton Thommessen. The Teacher Who Was Not To Be The Teacher Who Was Not To Be