Immunodeficiency, secondary

Secondary Immunodeficiency is a condition where the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. Unlike primary immunodeficiency, which is typically present from birth due to genetic abnormalities, secondary immunodeficiency is acquired later in life. This condition can result from a variety of sources, including environmental factors, diseases, and certain treatments or medications.

Causes

Secondary immunodeficiency can be caused by a wide range of factors, including but not limited to:

• Infections: Certain infectious agents, such as HIV, can directly impair the immune system.
• Chemotherapy and Radiation Therapy: These cancer treatments can temporarily weaken the immune system.
• Malnutrition: Inadequate nutrition can lead to a weakened immune response.
• Chronic Diseases: Diseases like diabetes and renal failure can impair the immune system.
• Immunosuppressive Medication: Drugs used to prevent organ rejection in transplant patients or to treat autoimmune diseases can suppress the immune system.

Symptoms

The symptoms of secondary immunodeficiency can vary widely depending on the underlying cause. Common symptoms include:

• Increased susceptibility to infections
• Infections that are more severe or harder to treat
• Delayed recovery from illness
• Fever and night sweats
• Weight loss

Diagnosis

Diagnosis of secondary immunodeficiency involves a comprehensive medical history, physical examination, and a variety of tests to assess immune function. These may include:

• Blood Tests: To check for low levels of immune cells or antibodies.
• Immunoglobulin Tests: To measure the levels of immunoglobulins in the blood.
• HIV Tests: To rule out HIV infection as a cause.

Treatment

Treatment for secondary immunodeficiency focuses on addressing the underlying cause, when possible, and managing symptoms. This may include:

• Antibiotic or Antifungal Medications: To treat infections.
• Immunoglobulin Therapy: To boost the levels of antibodies in the blood.
• Growth Factors: To stimulate the production of white blood cells.
• Adjusting Medications: Reducing or changing medications that are causing immunodeficiency, if possible.

Prevention

Preventing secondary immunodeficiency involves managing chronic conditions effectively, eating a balanced diet, avoiding exposure to infectious diseases, and following medical advice regarding the use of immunosuppressive medications.

See Also

• Primary Immunodeficiency
• Immune System
• HIV/AIDS
• Chemotherapy
• Radiation Therapy