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  • Title: Localized pustulosis induced by betalactams.
    Author: Novalbos A, Bombín C, Figueredo E, Lluch M, Sastre J.
    Journal: J Investig Allergol Clin Immunol; 2000; 10(3):178-9. PubMed ID: 10923595.
    Abstract:
    Localized forms of pustular drug eruptions related to antibiotics are uncommon and their mechanism is still unknown. We describe herein a patient who developed numerous pin-head pustules without erythema in the peribuccal area after ingestion of ceftibuten and amoxicillin. The relationship with these drugs was confirmed by single-blind oral challenges. The following tests were performed: prick and intradermal tests with benzylpenicilloyl polylysine, minor determinant mixture, benzylpenicillin and amoxicillin; patch tests were also carried out with benzylpenicillin, amoxicillin, cloxacillin, cefuroxime, ceftriaxone, cefazolin, ceftibuten and cefaclor. All cutaneous tests were negative. Controlled single-blind challenge tests were performed with amoxicillin, cefadroxil, ceftibuten, cefuroxime, cefaclor, erythromycin and ciprofloxacin. All betalactam antibiotics tested gave a positive reaction, with good tolerance of other antibiotics; this would appear to indicate a specific mechanism of hypersensitivity and not an unspecific reaction to wide spectrum antibiotics.
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