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Related Concept Videos

Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
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Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
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Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

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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.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
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Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
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Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

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Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
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Humoral Immune Responses01:36

Humoral Immune Responses

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Overview
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Immunodeficiency: A Protective Factor for COVID-19?

Zain AlShanableh1, Mohammad Haidous1, Krista M Wong1

  • 1Internal Medicine, Saint Vincent Charity Medical Center, Cleveland, USA.

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Summary

This study details a patient with idiopathic CD4+ lymphocytopenia who experienced severe COVID-19. Despite the risk factor, the patient showed an unexpected, full recovery from the respiratory infection.

Keywords:
ardscd4+ lymphocytopeniacovid-19cytokine stormimmunodeficiency

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Virology

Background:

  • Coronavirus disease 2019 (COVID-19) is a significant global health concern caused by SARS-CoV-2.
  • While most cases are mild, a substantial percentage develop severe or critical illness requiring hospitalization and respiratory support.
  • Immunodeficiency is a known risk factor for severe COVID-19 outcomes.

Observation:

  • The case involves a patient diagnosed with idiopathic CD4+ lymphocytopenia, a condition characterized by a low count of CD4+ T-lymphocytes without a known cause.
  • This patient contracted COVID-19 and presented with severe disease symptoms.

Findings:

  • The patient with idiopathic CD4+ lymphocytopenia exhibited an unexpected clinical course during severe COVID-19.
  • Despite the underlying immunodeficiency, the patient achieved complete recovery from the severe illness.

Implications:

  • This case highlights that individuals with idiopathic CD4+ lymphocytopenia may not always follow the predicted trajectory for severe COVID-19.
  • Further research is warranted to understand the immunological factors influencing COVID-19 severity in patients with lymphocytopenia.
  • The findings suggest potential resilience or alternative immune responses in certain immunodeficient states against SARS-CoV-2 infection.