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Related Concept Videos

Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

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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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Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

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Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin,...
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Hypersensitivity Reactions: Cytolytic Reactions01:01

Hypersensitivity Reactions: Cytolytic Reactions

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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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Pharmacokinetics in Pediatric Patients: Drug Excretion01:26

Pharmacokinetics in Pediatric Patients: Drug Excretion

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In pediatric medicine, understanding the renal function and drug elimination nuances is crucial for administering safe and effective treatments. Newborns, in particular, display markedly slower renal functions than adults, profoundly affecting how drugs are cleared from their bodies. This slower drug clearance requires clinicians to extend the dosing intervals for many medications to prevent drug accumulation and toxicity while ensuring therapeutic efficacy.One key area where these adjustments...
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Hypersensitivities01:30

Hypersensitivities

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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.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
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Allergic Drug Reactions01:27

Allergic Drug Reactions

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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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Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
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Recognising antibacterial hypersensitivity in children.

A Romano1

  • 1Department of Internal Medicine and Geriatrics, UCSC, CI Columbus, Rome, Italy. columbus.allerg@linet.it

Paediatric Drugs
|August 11, 2000
PubMed
Summary
This summary is machine-generated.

Adverse reactions to antibacterial drugs in children can be immediate or nonimmediate. Diagnosis involves a combination of patient history, in vivo tests like skin testing, and in vitro tests such as IgE assays.

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Area of Science:

  • Pediatric Allergy and Immunology
  • Pharmacology
  • Clinical Diagnostics

Background:

  • Adverse reactions to antibacterial agents are common in children.
  • Reactions are classified as immediate (within 1 hour) or nonimmediate (after 1 hour).
  • Immediate reactions involve IgE antibodies, while nonimmediate reactions may involve T lymphocytes.

Purpose of the Study:

  • To outline the clinical assessment and diagnostic approaches for adverse reactions to antibacterial agents in children.
  • To differentiate between immediate and nonimmediate reaction types and their diagnostic methods.
  • To highlight the utility of various in vivo and in vitro tests in diagnosing these reactions.

Main Methods:

  • Clinical assessment based on patient history.
  • In vivo diagnostic tests: prick tests, intradermal tests (immediate and delayed reading), patch testing.
  • In vitro diagnostic tests: specific IgE level determination, serum tryptase, urinary N-methylhistamine assays.
  • Provocation tests in selected cases.

Main Results:

  • Immediate reactions (urticaria, angioedema, bronchospasm, anaphylaxis) are often IgE-mediated.
  • Nonimmediate reactions include maculopapular rash, urticaria, and serum sickness.
  • Prick and intradermal tests are sensitive for beta-lactam allergy.
  • Patch testing aids in diagnosing maculopapular reactions to aminopenicillins.
  • Specific IgE, serum tryptase, and N-methylhistamine assays are valuable for immediate reactions.

Conclusions:

  • Diagnosing antibacterial adverse reactions in children requires a comprehensive approach combining clinical evaluation and appropriate testing.
  • Skin tests are crucial for evaluating immediate and delayed hypersensitivity.
  • While in vitro tests for immediate reactions are established, further validation is needed for other reaction types.