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Basophil Activation Test for Investigation of IgE-Mediated Mechanisms in Drug Hypersensitivity
Published on: September 16, 2011
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Immediate hypersensitivity reactions to beta-lactam antibiotics
Annals of Internal Medicine
|August 1, 1987
Summary
Allergic reactions to beta-lactam antibiotics like penicillin can be identified using skin tests. Many penicillin-allergic patients tolerate cephalosporins, but carbapenems show cross-reactivity.
Area of Science:
- Immunology
- Pharmacology
- Clinical Medicine
Background:
- Beta-lactam antibiotics are crucial but limited by allergic reactions.
- Immediate hypersensitivity to penicillins involves IgE antibodies to specific determinants.
- Cross-reactivity among beta-lactam subclasses is a significant clinical concern.
Purpose of the Study:
- To define the allergenic determinants of beta-lactam antibiotics.
- To assess cross-reactivity between penicillin and other beta-lactam classes.
- To improve patient selection for antibiotic therapy and reduce risks of allergic reactions.
Main Methods:
- In-vivo skin testing with penicillin determinants.
- In-vivo challenge studies with cephalosporins in penicillin-allergic patients.
- Evaluation of immune reactivity to monobactams (aztreonam) and carbapenems (imipenem).
Main Results:
- Penicillin determinants can identify patients at risk for immediate allergic reactions.
- Cephalosporin reactivity in penicillin-allergic patients is lower than commonly believed.
- Aztreonam (monobactam) shows no cross-reactivity with penicillin antibodies due to side-chain specificity.
- Imipenem (carbapenem) exhibits significant in-vivo cross-reactivity with penicillins.
Conclusions:
- Skin testing with penicillin determinants is valuable for predicting immediate hypersensitivity.
- Clinicians should consider the low cross-reactivity of cephalosporins in penicillin-allergic individuals.
- Carbapenems pose a significant risk of cross-reactivity in penicillin-allergic patients, unlike monobactams.
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