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Vaccinations01:51

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Immunological Memory01:23

Immunological Memory

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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
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Active versus Passive Immunity01:31

Active versus Passive Immunity

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Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
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Immune Response Against Viral Pathogens01:29

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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
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Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

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An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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The Immunological Basis for Vaccination.

Silke Rautenschlein1, Karel A Schat2

  • 1Clinic for Poultry, University of Veterinary Medicine Hannover, Clinic for Poultry, Hannover, Lower Saxony 30559, Germany, Silke.Rautenschlein@tiho-hannover.de.

Avian Diseases
|February 1, 2024
PubMed
Summary

Poultry vaccination relies on understanding bird immunity. Advances in avian immunology and new technologies like omics are improving vaccine efficacy for better flock health and production.

Keywords:
B cellsT cellsagegenotypeinnate immunityvaccinology

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Area of Science:

  • Avian immunology
  • Veterinary immunology
  • Vaccinology

Background:

  • Poultry vaccination is vital for flock health and production standards.
  • Understanding the avian immune system, including innate and acquired immunity, is key for effective vaccination strategies.
  • Despite similarities, avian and mammalian immune systems exhibit significant differences in signaling, antigen presentation, and cell repertoires.

Purpose of the Study:

  • To highlight the importance of avian immune system knowledge for poultry vaccination.
  • To discuss the impact of host factors like genotype, age, and microbiota on vaccination outcomes.
  • To explore how recent advancements, including trained immunity and omics technologies, can enhance vaccine efficacy.

Main Methods:

  • Review of current knowledge on avian innate and acquired immunity.
  • Discussion of factors influencing immune responses in poultry.
  • Exploration of emerging concepts like trained immunity and omics technologies in vaccinology.

Main Results:

  • Significant progress has been made in understanding avian immune systems, yet knowledge gaps persist.
  • Host factors such as bird genotype, age, and microbiota composition critically influence immune responses to vaccination.
  • Trained immunity and omics technologies offer promising avenues for improving vaccine efficacy beyond antigen-specific responses.

Conclusions:

  • A comprehensive understanding of avian immunology is essential for developing successful poultry vaccination strategies.
  • Future vaccine development should consider host-specific factors and leverage advancements in trained immunity and omics.
  • Improved vaccine efficacy will enhance poultry health, welfare, and production output.