AG meaning in Medical ?

Answer:

What is Antigen mean?

In immunology, an antigen (Ag) is a molecule or molecular structure that can bind to a specific antibody or T-cell receptor. The presence of antigens in the body may trigger an immune response. The term antigen originally referred to a substance that is an antibody generator. Antigens can be proteins, peptides (amino acid chains), polysaccharides (chains of monosaccharides/simple sugars), lipids, nucleic acids, or other biomolecules.

Antigens are recognized by antigen receptors, including antibodies and T-cell receptors. Diverse antigen receptors are made by cells of the immune system so that each cell has a specificity for a single antigen. Upon exposure to an antigen, only the lymphocytes that recognize that antigen are activated and expanded, a process known as clonal selection. In most cases, an antibody can only react to and bind one specific antigen; in some instances, however, antibodies may cross-react and bind more than one antigen.

The antigen may originate from within the body ("self-protein") or from the external environment ("non-self"). The immune system identifies and attacks "non-self" external antigens and usually does not react to self-protein due to negative selection of T cells in the thymus and B cells in the bone marrow.

Vaccines are examples of antigens in an immunogenic form, which are intentionally administered to a recipient to induce the memory function of the adaptive immune system towards antigens of the pathogen invading that recipient. The vaccine for seasonal influenza is a common example.

reference

Full Form	Category
attogram	Academic & Science
Anno Graecorum	Academic & Science
Amplitude Gate	Academic & Science
Accredited Genealogist	Academic & Science
Articulated Girder	Academic & Science
Attribute Grammar	Academic & Science
Author's Guide	Academic & Science
Astronomische Gesellschaft	Academic & Science
Anatomische Gesellschaft	Academic & Science
Actuarial Society	Academic & Science
Actuarieel Genootschap	Academic & Science
Applied Geomechanics	Academic & Science
Abstract Geometry	Academic & Science
Anastomosis Group	Academic & Science
Agriculture General	Business
Arctic Glacier Income Fund	Business
Affiliated Group	Business
After Guild	Business
Atri Graphics	Business
Actien Gesellschaft	Business
Automotive Group	Business
Aktien Gesellschaft	Business
Australia Group	Business
Agco Corporation	Business
Associated Group	Business
Assist Gate	Business
Architectural Group	Business
Silver	Chemistry
Silver (argentum)	Chemistry
Alan Greenspan	Community
Age Group	Community
Avant Garde	Community
All the Gospel	Community
Auxiliary Gymnasium	Community
Aging Gracefully	Community
Acoustic Guitar	Community
Average Gypsy	Community
Axtin Glenny	Community
After Golgotha	Community
Adventure Guide	Community
Academically Gifted	Community
Agriculture	Community
Action Group	Community
Al Gore	Community
Access Grant	Computer and Networking
Allocation Group	Computing
Astonishing Greatness	Computing
Adiccted Gamer	Computing
Arnold and Gosling	Computing
Antigua and Barbuda (TLD)	Computing
Amercian Gunners	Computing
Accepted Games	Computing
Anime Genisis	Computing
Antigua and Barbuda	Country Names
All Good	General
Albertu Ghraibzales	General
Acapulco Gold	General
Aipermon GmbH	General
Agent Group	General
General Auxiliary (Auxiliary, General)	General
Aktiengesellschaft the german	General
Ayer Guerra	General
After Goddess	General
Area Governor	General
Annoying Git	General
Animal Girl	General
All Gundam	General
Amazing Guy	General
Allocated Greenbacks	General
Aktiengesellschaft German	General
and AG	General
Au Ag	General
Allied Grocers	General
Associated Grocers	General
Abbreviations German	General
Auxiliary Grants	General
Arnaud Guera	General
American Girl	General
All Grain	General
Antigen Ag	General
About Good	General
Aggregate Grizzly	General
Acrobatic Gardener	General
Anime Genesis	General
Almost Good	General
After Garcia	General
America Gila	General
Administrator General	Governmental
Aerojet	Governmental
Auditor General	Governmental
Accountant General	Governmental
Aspiring Governor	Governmental
Amtsgericht	Governmental
Allen Grove	Governmental
ARANGHATA	Indian Railway Station
American Gebi	International
Argovia	International
Agrigento (Province)	International
Amcha Ghar	International
Asamblea General	International
Annus Gatesis	International
Ayatollah General	Jobs
Almost Governor	Jobs
Alpha Geek	Jobs
Always Generally	Maths
Algebraic Graph	Maths
Anion Gap	Medical
Antigen	Medical
Aspiration Goal	Medical
AGAMOUS	Medical
Association for Gnotobiotics	Medical
Awesome Guy	Messaging
Anything Goes	Messaging
Attorney General	Military and Defence
Adjutant General	Military and Defence
Application Gateway	Military and Defence
Army Group	Military and Defence
Army Guidance	Military and Defence
Air-ground	Military and Defence
Atuagagdliutit/Grønlandsposten	News & Entertainment
Anti-gravity	Physics Related
Galveston Railroad L. P.	Regional
Abbeville-Grimes Railway (Bay Line Railroad)	Regional
Aargau	Regional
Province of Agrigento	Regional
Arabian Gulf	Regional
Aurela Gaçe	Society & Culture
Adrianne Gonzalez	Society & Culture
Adriano Goldschmied	Society & Culture
Audio Graphics	Softwares
Artificial Gravity	Space Science
Attitude Gyroscope	Space Science
Aggravating Grunt	Sports
Anime Gamers	Sports
Abbeville–Grimes	Transport & Travel
Aruba Airlines	Transport & Travel