HYPERSENSITIVITIES Meaning and
Definition
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Hypersensitivities refer to the enhanced or exaggerated reactions exhibited by an individual's immune system towards certain substances or stimuli that are typically harmless to most people. These reactions can occur when the immune system mistakes these substances, known as allergens, as potentially harmful invaders, prompting an immune response.
Hypersensitivity reactions can be classified into four main types, based on the immune system mechanisms involved. Type I hypersensitivity, also known as immediate hypersensitivity, occurs within seconds or minutes after exposure to an allergen, and is associated with the release of compounds such as histamine, leading to symptoms like sneezing, itching, or hives. Type II hypersensitivity involves the activation of immune system cells, resulting in damage to the body's own cells or tissues. Type III hypersensitivity occurs when immune complexes of antigen and antibodies are formed and deposited in various tissues, triggering inflammation. Type IV hypersensitivity is characterized by a delayed response, typically occurring hours or even days after being exposed to an allergen, and involves the activation of immune cells called T-lymphocytes.
Hypersensitivities can manifest in various forms, such as hay fever, asthma, eczema, food allergies, or drug allergies. Common triggers of hypersensitivity reactions include pollen, dust mites, certain foods (e.g., peanuts, dairy, shellfish), medications (e.g., penicillin, aspirin), insect venom, and certain chemicals. Treatment options for hypersensitivities depend on the severity of the reaction and may include allergen avoidance, medication (e.g., antihistamines, corticosteroids), or immunotherapy.
Top Common Misspellings for HYPERSENSITIVITIES *
* The statistics data for these misspellings percentages are collected from over 15,411,110 spell check sessions on www.spellchecker.net from Jan 2010 - Jun 2012.
Other Common Misspellings for HYPERSENSITIVITIES
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Etymology of HYPERSENSITIVITIES
The word "hypersensitivities" is derived from two root words: "hyper" and "sensitivities".
1. "Hyper":
The prefix "hyper-" is derived from the Greek word "huper" which means "above" or "beyond". In English, "hyper-" is used to indicate excessive or above-normal behavior or condition.
2. "Sensitivities":
The word "sensitivities" is derived from the Latin word "sensitivus" which means "capable of perception through the senses". It has roots in the Latin word "sensus", meaning "sense" or "feeling".
Combining these two root words, "hypersensitivities" refers to a condition where a person or organism has an excessive or heightened sensitivity towards certain stimuli or factors.
Similar spelling words for HYPERSENSITIVITIES
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