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Cell-mediated Immune Responses01:40

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Factors Affecting the Risk of Infection01:26

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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.
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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
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Peptide-based Identification of Functional Motifs and their Binding Partners
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Secondary immunodeficiencies, including HIV infection.

Javier Chinen1, William T Shearer

  • 1Department of Pediatrics, Allergy and Immunology Section, Baylor College of Medicine, Houston, TX 77030, USA. jxchinen@texaschildrenshospital.org

The Journal of Allergy and Clinical Immunology
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PubMed
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Secondary immunodeficiency, often caused by malnutrition or medications, increases infection risk. Addressing the underlying cause can improve immune function and reduce infection susceptibility.

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Area of Science:

  • Immunology
  • Clinical Medicine

Background:

  • Extrinsic factors can lead to secondary immunodeficiency, increasing infection risk.
  • Common causes include medications (glucocorticoids, immunomodulatory drugs), surgery, trauma, environmental extremes, chronic infections (e.g., HIV), and malnutrition.
  • Nutritional deficiencies, particularly protein-calorie and micronutrient deficits, significantly impact immune responses, with vitamin D deficiency affecting immune activation.

Purpose of the Study:

  • To review the causes, clinical presentation, and management of secondary immunodeficiency.
  • To highlight the impact of extrinsic factors on immune system function.
  • To emphasize the link between secondary immunodeficiency and increased infection risk.

Main Methods:

  • Literature review of conditions causing secondary immunodeficiency.
  • Analysis of the impact of various extrinsic factors on immune responses.
  • Discussion of clinical presentation and management strategies.

Main Results:

  • Secondary immunodeficiencies are heterogeneous and clinically variable.
  • Prognosis is linked to the severity of the immune defect.
  • Management of the primary condition is key to improving immunodeficiency.

Conclusions:

  • Secondary immunodeficiency arises from diverse extrinsic factors, necessitating identification and management of the underlying cause.
  • Prompt antimicrobial treatment and prophylaxis are crucial for managing infection risk.
  • Understanding these factors is vital for clinical practice and patient outcomes.