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Type II hypersensitivity involves IgG and IgM antibodies targeting cell surface antigens, leading to cell destruction. This can occur through complement activation, antibody-dependent cell-mediated cytotoxicity (ADCC), or acting as opsonins for phagocytosis. When excessive, these reactions cause significant tissue damage.Drug-induced hemolytic anemia is a common example, where drugs like penicillin or cephalosporins bind to red blood cells, forming drug-protein complexes. These complexes...
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Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
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Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...
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Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
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Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
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The Use of a β-lactamase-based Conductimetric Biosensor Assay to Detect Biomolecular Interactions
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Beta-lactam hypersensitivity and cross-reactivity.

Adrienne T Terico1, Jason C Gallagher2

  • 1Post-Graduate Year 2 Infectious Diseases Pharmacotherapy Resident, Temple University Hospital, Philadelphia, PA, USA.

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|August 16, 2014
PubMed
Summary
This summary is machine-generated.

Penicillin allergy is common, but cross-reactivity with other beta-lactams like cephalosporins and carbapenems is lower than previously thought. Reconsider avoiding these antibiotics in penicillin-allergic patients.

Keywords:
beta-lactamcross-reactivityhypersensitivitypenicillin

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Area of Science:

  • Pharmacology
  • Immunology
  • Infectious Diseases

Background:

  • Penicillin is a frequent cause of drug allergies.
  • Cross-reactivity between penicillin and other beta-lactam antibiotics is debated.
  • Current clinical practice often avoids cephalosporins, carbapenems, and monobactams in penicillin-allergic patients.

Purpose of the Study:

  • To review available data on immunoglobulin E-mediated penicillin hypersensitivity.
  • To evaluate cross-reactivity between penicillin and cephalosporin, carbapenem, and monobactam antibiotics.
  • To inform clinical practice regarding beta-lactam antibiotic use in penicillin-allergic individuals.

Main Methods:

  • MEDLINE search from 1950 to October 2013.
  • Inclusion of selected references from review articles.
  • Evaluation of data on penicillin hypersensitivity and cross-reactivity.

Main Results:

  • Early studies reported high cross-reactivity rates (up to 41.7% with cephalosporins, 47.4% with carbapenems).
  • More recent prospective studies indicate lower cross-reactivity rates (<5% with cephalosporins, <1% with carbapenems).
  • Cross-reactivity with monobactams is negligible, though some interaction data exists for ceftazidime and aztreonam.

Conclusions:

  • Observed cross-reactivity between penicillin and other beta-lactams is lower than previously estimated.
  • Structural similarities in side chains may influence cross-reactivity.
  • Avoidance of cephalosporins, carbapenems, and monobactams in penicillin-allergic patients may be overly cautious and should be reconsidered.