What Are Primary Immunodeficiencies?
This booklet explains what primary immunodeficiencies (PIDs) are and outlines essential guidelines that PID patients should follow to stay healthy.
Understanding Primary Immunodeficiencies (PIDs)
Primary immunodeficiencies (PIDs) are a large group of disorders that occur when certain components of the immune system (mainly cells and proteins) fail to function properly. PIDs can range from mild to severe. While they are often diagnosed in childhood, they can also be identified in adults. PIDs are not related to acquired immunodeficiency syndrome (AIDS), which is caused by a viral infection (HIV).
Under normal circumstances, the immune system helps the body fight infections caused by microbes such as bacteria, viruses, fungi, and parasites. People with PIDs are more susceptible to these infections because of immune system dysfunction. These infections may occur more frequently, be more severe and harder to treat, or be caused by rare pathogens. They can also develop at any time of the year, including summer.
Treatment of PIDs
Many people with PIDs receive immunoglobulin therapy, which helps their bodies combat infections. For patients with severe forms of PID, treatment may include stem cell (or bone marrow) transplantation, granulocyte-colony stimulating factor, and gamma interferon therapy. More details on these treatments can be found in the IPOPI booklet “Treatment of Primary Immunodeficiencies: A Guide for Patients and Their Families.”
PIDs are caused by hereditary or genetic defects in the immune system. They are not contagious and cannot be “caught” or spread to others. However, children can inherit these conditions from their parents. People with PIDs should seek genetic counseling if they are planning a pregnancy.
Some PIDs can lead to immune responses against the body itself, known as “autoimmune processes.” These may cause joint pain and swelling (arthritis), skin rashes, loss of red blood cells (anemia), platelet deficiency (leading to bleeding issues), diarrhea, and kidney disease. Some PID patients may also be prone to allergies and asthma.
Living with PIDs
With proper treatment, many patients with PIDs can lead normal lives. There are several measures that adults, parents, and children with PIDs can take to stay healthy.
Preventing Infections
People with PIDs are more prone to infections affecting different parts of the body, including:
- Eyes
- Ears
- Skin
- Sinuses
- Bronchi
- Lungs
- Intestines
- Urinary tract
It is crucial to consult a doctor when infections arise.
Hygiene Practices
Personal hygiene plays a critical role in infection prevention and includes simple habits such as:
- Regular and thorough handwashing, especially before meals and after using the toilet, going outside, or handling animals.
- Cleaning and covering cuts and scratches.
- Proper dental hygiene and regular visits to the dentist.
- Safe food handling to prevent foodborne illnesses.
- Covering the mouth and nose when sneezing or coughing.
- Maintaining a clean home and controlling humidity to prevent lung issues.
- Regularly washing children’s toys.
- Avoiding smoky and crowded places.
Where possible, PID patients should minimize contact with individuals suffering from infectious diseases. Parents of children with severe PIDs should stay informed about infection outbreaks in schools and seek medical advice accordingly.
Some PID patients may require additional precautions when interacting with pets and other animals. If in doubt, consult a doctor.
For those requiring surgery, surgeons should be informed about the patient’s PID to take necessary infection prevention measures.
Many PID patients receive immunoglobulin replacement therapy to maintain adequate antibody levels for infection protection. They may also need antibiotics, antivirals, or antifungal medications for infection prevention and treatment. It is vital to follow the doctor’s instructions regarding these medications.
Vaccination
Vaccination involves administering small doses of bacteria or viruses to develop immunity. Some vaccines contain killed microorganisms, while others contain live ones.
Patients receiving immunoglobulin therapy generally do not require vaccinations. However, in most cases, they should not receive live vaccines, as these may cause infections. Live attenuated vaccines include rotavirus, oral polio, measles-mumps-rubella (MMR), varicella (chickenpox), and BCG (tuberculosis). Family members should also be vaccinated to prevent the spread of infections at home. Patients and parents should always consult a doctor regarding vaccinations.
Travel Precautions
Having PID does not mean that travel is prohibited, but certain precautions are necessary. Patients should discuss travel plans with an immunologist for safety advice and necessary vaccinations. Before traveling, PID patients should ensure they have appropriate medical and travel insurance.
It is advisable to carry a letter from a doctor explaining the condition, required medications, and medical equipment. If possible, this letter should be translated into the language of the destination country. Sample letters are available at www.ipopi.org.
Diet and Nutrition
A nutritious and balanced diet is crucial for overall health. People with PIDs should avoid raw or undercooked food, such as meat, eggs, and unpasteurized dairy products. Most patients do not require special diets or vitamin supplements, but they should consult an immunologist before taking any additional supplements.
It is also essential to avoid drinking water from unknown sources or water that has been stored for long periods.
Skin Care
Some PID patients may need to take special precautions for skin care, such as avoiding excessive sun exposure. Consult a doctor for personalized recommendations.
Physical Activity and Sports
PID patients can generally enjoy exercise and sports like anyone else. However, those with phagocyte deficiencies (such as chronic granulomatous disease) should avoid swimming in lakes or ponds, gardening, and contact with decaying plants or wooden materials. Some PIDs affect blood clotting, so patients should discuss safe sports options with their immunologist.
Sleep and Rest
Getting enough sleep is crucial for PID patients. The required amount of sleep varies by age. Parents should consult their doctor about appropriate sleep durations for their children.
Sexual Health
PID patients should take precautions to prevent sexually transmitted infections, such as using condoms.
Smoking and Environmental Factors
People with PIDs should avoid smoking, as it increases the risk of lung infections. When possible, they should also ask others not to smoke around them. Parents of children with PIDs should not smoke at all.
By following these guidelines and receiving appropriate treatment, many people with PIDs can lead fulfilling, healthy lives.