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Alkali-treated penicillin G solution is a better option than penicillin G as an alternative source of minor determinants for penicillin skin test

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Both benzylpenicilloyl-polylysine (PPL) and minor determinant mixture (MDM) are the recommended standard reagents for penicillin skin testing. However, penicillin G is commonly suggested as an alternative source of minor determinants. This study evaluated the accuracy of penicillin G and alkali-treated penicillin G compared with the standardized MDM for skin testing. Sixty-eight patients with histories of allergies to penicillin or semisynthetic penicillins were skin tested with commercial Kit penicillin allergenic determinants (DAP) (PPL and DAP-MDM; Diater Laboratorios, Madrid, Spain). The in-house MDM (IH-MDM), prepared by alkali-treated aged penicillin, and fresh penicillin G sodium (PGs) were tested alongside DAP-MDM. Positive penicillin skin test results were identified in 22 patients (32.4%) using commercial reagents (PPL+ DAP-MDM) and 19 of them reacted to DAP-MDM alone or together with PPL. The accuracy of IH-MDM and PGs compared with DAP-MDM was 89.7 and 76.5%, respectively. Our study shows that alkali-treated penicillin G is a better option than penicillin G as an alternative source of MDM for skin testing in case the commercialized MDM is not available. Minor determinants play a significant role for penicillin allergy in Thailand and should be included in the penicillin skin test panel to verify suspected cases of penicillin allergy. (ClinicalTrials.gov number: NCT00789217)
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Keywords: Adverse drug reactions; drug allergy; drug hypersensitivity; minor determinants; penicillin allergy; penicillin skin testing; skin test

Document Type: Research Article

Publication date: 2012-03-01

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  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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