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Lung diseases at necropsy in African children dying from respiratory illnesses: a descriptive necropsy study
Chifumbe Chintu1, Victor Mudenda, Sebastian Lucas
1University of Zambia-University College London Medical School Research and Training Project, University Teaching Hospital, Lusaka, Zambia.
Insights
Most child deaths from respiratory illnesses in Zambia are due to preventable infections like pneumonia and tuberculosis. HIV-positive children face higher risks for Pneumocystis pneumonia and cytomegalovirus, necessitating updated WHO guidelines and better diagnostics.
Area of Science:
- Pediatric Infectious Diseases
- Respiratory Medicine
- Global Health
Background:
- Limited autopsy data exists on specific causes of death in African children with respiratory illnesses.
- A study was conducted at University Teaching Hospital, Lusaka, Zambia, to investigate respiratory disease mortality in children.
Purpose of the Study:
- To determine the specific lung diseases causing death in children presenting with respiratory illnesses.
- To stratify findings by age and Human Immunodeficiency Virus type 1 (HIV-1) status.
Main Methods:
- Autopsies were performed on the chest cavities of 264 children (137 boys, 127 girls) aged 1 month to 16 years.
- Children were categorized by age and HIV-1 status (positive or negative).
Main Results:
- Acute pyogenic pneumonia (39.1%), Pneumocystis carinii pneumonia (27.5%), tuberculosis (18.8%), and cytomegalovirus (CMV) infection (20.2%) were the most common findings.
- HIV-1-positive children had significantly higher rates of Pneumocystis carinii pneumonia (OR 5.28), CMV (OR 7.71), and shock lung (OR 4.15).
- Tuberculosis was prevalent across all age groups and HIV-1 statuses.
Conclusions:
- The majority of pediatric respiratory deaths result from treatable infectious agents.
- The frequent co-occurrence of multiple diseases complicates diagnosis.
- Updated World Health Organization guidelines and improved diagnostic tools for bacterial pathogens, tuberculosis, and Pneumocystis carinii pneumonia are crucial, especially for HIV-1-positive children.
Background:
Accurate information about specific causes of death in African children dying of respiratory illnesses is scarce, and can only be obtained by autopsy. We undertook a study of children who died from respiratory diseases at University Teaching Hospital, Lusaka, Zambia.
Methods:
137 boys (93 HIV-1-positive, 44 HIV-1-negative], and 127 girls (87 HIV-1-positive, 40 HIV-1-negative) aged between 1 month and younger than 16 years underwent autopsy restricted to the chest cavity. Outcome measures were specific lung diseases, stratified by age and HIV-1 status.
Findings:
The presence of multiple diseases was common. Acute pyogenic pneumonia (population-adjusted prevalence 39.1%, 116/264), Pneumocystis carinii pneumonia (27.5%, 58/264), tuberculosis (18.8%, 54/264), and cytomegalovirus infection (CMV, 20.2%, 43/264) were the four most common findings overall. The three most frequent findings in the HIV-1-negative group were acute pyogenic pneumonia (50%), tuberculosis (26%), and interstitial pneumonitis (18%); and in the HIV-1-positive group were acute pyogenic pneumonia (41%), P carinii pneumonia (29%), and CMV (22%). HIV-1-positive children more frequently had P carinii pneumonia (odds ratio 5.28, 95% CI 2.12-15.68, p=0.0001), CMV (7.71, 2.33-40.0, p=0.0002), and shock lung (4.15, 1.20-22.10, p=0.03) than did HIV-1-negative children. 51/58 (88%) cases of P carinii pneumonia were in children younger than 12 months, and five in children aged over 24 months. Tuberculosis was common in all age groups, irrespective of HIV-1 status.
Interpretation:
Most children dying from respiratory diseases have preventable or treatable infectious illnesses. The presence of multiple diseases might make diagnosis difficult. WHO recommendations should therefore be updated with mention of HIV-1-positive children. Improved diagnostic tests for bacterial pathogens, tuberculosis, and P carinii pneumonia are urgently needed.
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