Question 1

what are the common types of hypersensitivity reactions?

Accepted Answer

Many possibilities: The word "hypersensitivity" often is used to describe an allergic reaction. Possible causes of allergic reactions are sensitivities to foods, insects, medications, etc...

Question 2

what is the definition or description of: hypersensitivity?

Accepted Answer

Hypersensitivity: Hypersensitivity reactions = adverse reactions produced by a normal immune system. (i.e.,  allergies or autoimmunity)

Question 3

what causes viseral hypersensitivity? what can make it go away?

Accepted Answer

: Visceral hypersensitivity has been a cause of many symptoms and occurs in the absence of pathology. However,we have to first carefully evaluate a patient before we can be sure that there is no pathology to explain symptoms. If am sure, referral to a mental health professional for cognitive behavioral therapy would be my recommendation. Stress management therapy or forms of.meditation could help

Question 4

what is the difference between type i hypersensitivity and type ii?

Accepted Answer

Big difference: Type 1 is mediated by the IgE antibody and responsible for anaphylaxis, hay fever, allerg etc. Allergy skin test can identify these. 
 Type 2 is mediated by IgG or IgM antibody and complement proteins that are "cytotoxic" that ends up killing the target cell.  Examples of  this are hemolytic anemia, Graves disease, Myasthenia gravis, Rheumatic heart disease, etc.  For anemia, a Coombs test is used

Question 5

help please? what is the difference between type i hypersensitivity to type ii?

Accepted Answer

Type I is immediate: hypersensitivity reactions, involves IgE with histamine and other mediators release from mast cells, while type II is cytotoxic hypersensitivity reactions involving IgG or IgM bound to cell surface antigens, with subsequent complement (a protein in the blood) fixation, there are also type III and type IV reactions, type I reactions are responsible for immediate allergic symptoms to foods or drugs

Question 6

i have a friend who drank on friday and is having hypersensitivity reactions in his body?

Accepted Answer

What did he drink?: It is not at all clear to me what he drank or how much he drank? was it laced with some other drug etc?
Needs to see his doctor for treatment of symptoms and maybe the allergic type symptoms.

Question 7

intense nerve hypersensitivity to touch. do tricyclics reduce this? or do they just attenuate feelings of pain?

Accepted Answer

Yes: Tricyclics can  decrease nerve pain

Question 8

hypersensitive to noise. what can i do?

Accepted Answer

Not an allergy: Consult an ENT surgeon to find out if there is anything wrong with your hearing or ears and follow his/her advice. Until you have been examined, you may use ear protectants.

Question 9

what is a type 4 hypersensitivity reaction?

Accepted Answer

Delayed reaction: Type 4 reactions are delayed reactions involving t cells (i.e. Poison ivy).

Question 10

what is cytotoxic hypersensitivity (type 2)?

Accepted Answer

Type II hypersensitivity: Or cytotoxic reactions, are antibody dependent, IgG or IgM binds to the own body cell surface  after being altered by a protein, so the immune system recognizes as non-self (foreign) attacks and destroys the cell by fixing a protein called complement, which in turn forms the Membrane Attack Complex and destroy the cell, the most famous is hemolytic anemias and some auto immune diseases

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Doctor answers about:

Hypersensitivity

A member asked:

What are the common types of hypersensitivity reactions?

A member asked:

What is the definition or description of: hypersensitivity?

A member asked:

What causes viseral hypersensitivity? what can make it go away?

A member asked:

What is the difference between type i hypersensitivity and type ii?

A member asked:

Help please? what is the difference between type i hypersensitivity to type ii?

A member asked:

I have a friend who drank on friday and is having hypersensitivity reactions in his body?

A member asked:

Intense nerve hypersensitivity to touch. do tricyclics reduce this? or do they just attenuate feelings of pain?

A member asked:

Hypersensitive to noise. what can i do?

A member asked:

What is a type 4 hypersensitivity reaction?

A member asked:

What is cytotoxic hypersensitivity (type 2)?

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