Related Experiment Videos
Pneumocystis carinii pneumonia and primary immune deficiency diseases
Insights
Pneumocystis carinii pneumonia in young children is often linked to immune deficiencies. Acute lymphatic leukemia is common in older children, while severe combined immunodeficiency affects infants, highlighting varied underlying causes.
Area of Science:
- Pediatric Infectious Diseases
- Immunology
- Hematology Oncology
Background:
- Pneumocystis carinii pneumonia (PCP) is a significant opportunistic infection in immunocompromised individuals.
- In children, underlying conditions play a crucial role in susceptibility to PCP.
- Understanding these associations is vital for early diagnosis and management.
Purpose of the Study:
- To analyze the underlying diseases associated with Pneumocystis carinii pneumonia in children under 5 years old.
- To identify patterns of underlying conditions based on age groups.
- To investigate familial links in cases of immunodeficiency and PCP.
Main Methods:
- Retrospective analysis of 50 reported cases of Pneumocystis carinii pneumonia in children under 5 years.
- Categorization of underlying diseases by age (less than 1 year vs. 1-4 years).
- Detailed review of specific immune deficiency types and familial history.
Main Results:
- Primary immune deficiency diseases were most frequent in infants (83%), with severe combined immunodeficiency being the most common type (60%).
- Acute lymphatic leukemia was the predominant underlying disease in children aged 1-4 years (81%).
- A notable percentage of immunodeficient patients (24%) had siblings who died from similar conditions.
Conclusions:
- Pneumocystis carinii pneumonia in young children is strongly associated with underlying immune system defects or malignancies.
- Age-specific patterns exist, with primary immunodeficiencies in infants and leukemia in older children.
- The findings suggest a potential genetic component in some cases, warranting further investigation into the pathogenesis.
Abstract:
During a 3-year period, 50 cases of Pneumocystis carinii pneumonia in children less than 5 years old were reported to the Parasitic Disease Drug Service, Center for disease Control. Primary immune deficiency diseses constituted the most frequent underlying diseases in patients less than 1 year old (24/29 cases, 83%), whereas acute lymphatic leukemia was the most common underlying diseases in children 1-4 years old (17/21 cases, 81%). Severe combined immunodeficiency was the most common type of immune deficiency disease (15/25 cases, 60%). Six (24%) of the immunodeficient patients each had a sibling who died during infancy of an immunologic deficiency disease and P. carinii penumonia. Although the pathogenesis of the association between immune deficiency and P. carinii pneumonia is poorly understood, defects in both humora and cellular immunity appear to be operative.--Natl Cancer lst Monogr 43: 65-72, 1976.