B2 noun フォーマル

antigen

/ˈæntɪdʒən/

An antigen is any substance, such as a toxin, virus, or bacterium, that causes the body's immune system to produce antibodies against it. It is essentially a chemical marker that the body recognizes as foreign or harmful.

例文

3 / 5
1

The doctor explained that the antigen in the vaccine would help my body prepare for future infections.

The physician clarified that the substance in the shot triggers the body to prepare for later illnesses.

2

The presence of a specific viral antigen indicates an active infection within the patient.

Finding a particular viral marker shows the patient currently has the disease.

3

Think of an antigen as a 'wanted poster' that tells your immune system who the bad guys are.

Consider this substance a signal that identifies threats to your body's defenses.

語族

名詞
antigen, antigenicity
副詞
antigenically
形容詞
antigenic
関連
antibody
💡

覚え方のコツ

Think of 'Anti-gen' as an 'Antibody Generator'. It is the substance that generates the need for antibodies.

クイックテスト

The patient tested positive for the viral _______, meaning they are likely currently infected.

正解!

正解は: antigen

例文

1

The doctor explained that the antigen in the vaccine would help my body prepare for future infections.

everyday

The physician clarified that the substance in the shot triggers the body to prepare for later illnesses.

2

The presence of a specific viral antigen indicates an active infection within the patient.

formal

Finding a particular viral marker shows the patient currently has the disease.

3

Think of an antigen as a 'wanted poster' that tells your immune system who the bad guys are.

informal

Consider this substance a signal that identifies threats to your body's defenses.

4

The study focused on the structural characteristics of the surface antigen of the influenza virus.

academic

The research analyzed the physical traits of the outer markers on the flu virus.

5

The pharmaceutical company is investing heavily in the development of new antigen-based diagnostic kits.

business

The drug firm is funding the creation of testing tools that detect specific biological markers.

語族

名詞
antigen, antigenicity
副詞
antigenically
形容詞
antigenic
関連
antibody

よく使う組み合わせ

antigen test a diagnostic procedure to detect viral proteins
surface antigen proteins found on the outer layer of a cell or virus
antigen response the reaction of the immune system to a foreign substance
specific antigen a unique marker belonging to a particular pathogen
antigenic drift the process of small changes in virus genes over time

よく使うフレーズ

antigen-presenting cell

a cell that displays foreign markers to help the immune system recognize them

rapid antigen test

a quick medical test used to detect the presence of specific proteins

antigen-antibody complex

the molecule formed when an antibody binds to its target

よく混同される語

antigen vs antibody

An antigen is the 'invader' or trigger, while an antibody is the 'soldier' produced by the body to neutralize it.

antigen vs pathogen

A pathogen is the entire harmful organism (like a germ), whereas an antigen is a specific part of that pathogen.

📝

使い方のコツ

The word is primarily used in medical and biological contexts. While it technically refers to any substance that triggers immunity, in general conversation it is most often used regarding diagnostic tests.

⚠️

よくある間違い

Learners often use 'antigen' and 'antibody' interchangeably; remember that 'gen' in antigen implies it 'generates' an immune response.

💡

覚え方のコツ

Think of 'Anti-gen' as an 'Antibody Generator'. It is the substance that generates the need for antibodies.

📖

語源

Derived from the French 'antigène', a contraction of 'antisérum' and 'gène' (producing).

文法パターン

Countable noun (plural: antigens) Often used as a noun adjunct (e.g., antigen detection)
🌍

文化的な背景

The term became widely known by the general public globally during the COVID-19 pandemic due to the prevalence of 'rapid antigen tests'.

クイックテスト

The patient tested positive for the viral _______, meaning they are likely currently infected.

正解!

正解は: antigen

関連単語

circumgrator

C1

Describing a movement or path that wanders in a circular or roundabout fashion rather than following a direct line. It often characterizes physical motion that encompasses a central area or an indirect approach to a task or problem.

micromerctude

C1

The state or quality of being excessively focused on minute, often trivial details within a mercantile or commercial context. It describes a meticulous precision that borderlines on pedantry, usually regarding small-scale financial transactions or specific trade conditions.

comvertant

C1

A comvertant refers to an entity, proposition, or individual currently undergoing a process of transformation or conversion. It is often used in specialized academic or technical contexts to denote the specific subject being changed from one state or category to another.

subgravate

C1

To aggravate or worsen a situation, condition, or feeling in a subtle or minor degree. It often implies exerting a gradual downward pressure or adding a slight burden to an already difficult circumstance.

dispetize

C1

A dispetize is a formal process or systematic act of resolving minor grievances and petty disputes within a professional or social organization. It serves as a clearinghouse for small-scale conflicts to ensure they do not escalate into significant structural issues.

ultrademation

C1

Ultrademation refers to the state or process of extreme, total automation where human intervention is entirely replaced by autonomous systems and decision-making algorithms. It represents the highest possible tier of technological autonomy within an industrial or digital framework.

semipulsate

C1

A state or instance of partial or intermittent rhythmic throbbing or beating, often occurring at irregular intervals or with reduced intensity. In technical contexts, it refers to a cycle that does not reach the full amplitude of a standard pulse.

adsontion

C1

To undergo or facilitate the process of molecular adhesion where molecules of a gas, liquid, or dissolved solid accumulate on the surface of a solid or liquid. Unlike absorption, this process is strictly a surface phenomenon and does not involve the substance being taken into the body of the material.

intrarogship

C1

Relating to the internal state or quality of inquiry and mutual accountability within a specific group or institution. It describes the dynamics of procedural questioning that remain within a single organizational hierarchy rather than involving external parties.

underpacant

C1

To perform a task or meet a requirement at a rate or quality lower than what was previously established or expected. It is often used in technical or administrative contexts to describe a failure to keep pace with a specific standard or quota.

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