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Host resistance and the immune system.

A Ben-Yehuda¹, M E Weksler

¹Hadassah University Medical Center, Jersualem, Israel.

Clinics in Geriatric Medicine

|November 1, 1992

Summary

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Aging weakens the immune system, making elderly individuals more prone to infections. This decline affects various immune cells and functions, increasing vulnerability in older adults.

Area of Science:

Immunology
Gerontology
Infectious Diseases

Background:

Elderly individuals exhibit increased susceptibility to infections compared to younger adults.
This vulnerability is linked to a decline in host defense mechanisms and altered immune function with aging.

Purpose of the Study:

To discuss the impact of aging on the immune system.
To explore age-related changes in immune cell function and host resistance.

Main Methods:

Review of literature on aging and immune function.
Discussion of T- and B-lymphocyte function in the elderly.
Analysis of antigen-presenting cells, natural killer cells, and granulocytes in aging.

Main Results:

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Aging leads to diminished T- and B-lymphocyte responses.

Impaired function of antigen-presenting cells, natural killer cells, and granulocytes is observed in older adults.

Organ-specific host resistance is compromised due to immunosenescence.

Conclusions:

Immunosenescence, the aging of the immune system, underlies increased infection risk in the elderly.
Understanding these immune alterations is crucial for developing strategies to combat infections in older populations.