Lack of energy; inactivity.

Lack of response to the injection of a certain foreign substance. This may indicate the inability of the immune system to mount a normal allergic response.

Absence of immune response to particular substances.

The absence of an expected cell-mediated immune reaction in sensitized organisms, caused by inactivated B and T cells. Also used to describe inactivated T or B cells.

Lack of response by the immune system. A T-cell that meets a foreign molecule (antigen) and doesn't respond is described as anergic.

State of induced lymphocyte non-responsiveness to antigen.

reduction or lack of an immune response to a specific antigen

A condition wherein a person has diminished ability to exhibit delayed T-cell hypersensitivity reaction to antigens because of a condition or situation resulting in altered immune function. When referring to inability to react to a skin test, the correct term is cutaneous anergy. Skin tests for anergy (i.e., control antigens) have poor predictive value and are not recommended.

the inability to react to a skin test because of a weakened immune system, often caused by HIV infection or severe illness (see anergy testing)

the lack of an immune response to a foreign antigen. Anergy may indicate an inability to mount a normal allergic or immune reaction, and may be a sign of immunocompromise.

The loss or weakening of the body's immunity to an irritating agent or antigen.

the loss or weakening of immune response to an irritating agent or antigen. Anergy can be thought of as the opposite of allergy, which is an overreaction to a substance. The strength of the immune response is often quantitatively evaluated by standardized skin tests. A small amount of solution containing an antigen known to cause a response, such as tetanus, mumps, or candida, is injected under the skin and the area checked for a localized skin reaction after 48 to 72 hours. Healthy people will develop a measurable area of redness at the injection site; people who are immune suppressed, such as people with AIDS, will have no measurable response to these skin tests.

A potentially reversible form of immunologic tolerance in which lymphocytes become functionally unresponsive.

A state of immune unresponsiveness. Induced when the T cell's antigen receptor is stimulated, effectively freezing T cell responses pending a "second signal" from the antigen-presenting cell. The delivery of the second signal by the antigen-presenting cell rescues the activated T cell from anergy, allowing it to produce the lymphokines necessary for the growth of additional T cells. See the entire definition of Anergy

A state of unresponsiveness, induced when the T cell's antigen receptor is stimulated, that effectively freezes T cell responses pending a "second signal" from the antigen-presenting cell ( co-stimulation).

Loss of skin reactivity to an antigen.

1) Lack of energy. 2) diminished reactivity to all antigens.

Inactivation of lymphocytes leading to an absence of an immune response and producing immune tolerance

Failure to make an immune response following stimulation with a potential antigen.

Anergy is a theory in immunobiology that describes a lack of reaction by the body's defence mechanisms to foreign substances, and consists of a direct induction of peripheral lymphocyte tolerance. A state of anergy often indicates that the immune system is unable to mount a normal immune response against a specific antigen, usually a self-antigen.