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Ch. 17 - Adaptive Immunity: Specific Defenses of the Host
Tortora - Microbiology: An Introduction 14th Edition
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTortora 14th EditionCh. 17 - Adaptive Immunity: Specific Defenses of the HostProblema 8
Capitolo 13, Problema 8

Explain why a person who recovers from a disease can attend others with the disease without fear of contracting it.

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Understand that when a person recovers from a disease, their immune system has been exposed to the pathogen responsible for that disease.
During the infection, the immune system produces specific antibodies and memory cells that recognize and respond quickly to the pathogen if it enters the body again.
These memory cells provide long-lasting immunity by enabling the immune system to mount a faster and stronger response upon re-exposure to the same pathogen.
Because of this immune memory, the recovered person is generally protected from reinfection by the same disease-causing organism.
Therefore, the recovered person can safely attend to others with the disease without fear of contracting it again, as their immune system effectively prevents the pathogen from causing illness.

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Immunity Development

When a person recovers from a disease, their immune system has produced specific antibodies and memory cells against the pathogen. This immune memory allows the body to recognize and respond quickly to future exposures, preventing reinfection or reducing disease severity.
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Immune Tolerance

Adaptive Immune Response

The adaptive immune response involves the activation of lymphocytes that target specific pathogens. After initial infection, these cells remain in the body, providing long-term protection by rapidly neutralizing the pathogen upon re-exposure.
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Primary and Secondary Response of Adaptive Immunity

Herd Immunity and Exposure Risk

Recovered individuals often have reduced susceptibility to the disease, lowering their risk of contracting it again. This concept also contributes to herd immunity, where immune individuals help limit disease spread within a population.
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1) Exposure to Pathogen
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a. IgA

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(3) antigen fragment goes to surface of the B cell

(4) TH recognizes antigen fragment and MHC

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