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Indicators of life-threatening malaria in African children
K Marsh1, D Forster, C Waruiru
1Kenya Medical Research Institute-Clinical Research Centre, Kilifi Unit, Kenya.
Insights
In African children, impaired consciousness and respiratory distress are key indicators of severe malaria, significantly increasing the risk of death. These simple bedside signs help identify high-risk malaria cases more effectively.
Area of Science:
- Pediatric Infectious Diseases
- Global Health Epidemiology
Background:
- Malaria causes a high mortality rate in African children, yet diagnostic criteria for severe malaria are not validated for this population.
- Existing World Health Organization (WHO) criteria for severe malaria require validation in African children.
Purpose of the Study:
- To validate and identify key prognostic indicators for severe malaria in African children.
- To improve the recognition and management of severe malaria in pediatric populations in Africa.
Main Methods:
- A prospective study was conducted on 1844 children admitted with malaria to a Kenyan district hospital.
- Logistic-regression analysis was used to identify prognostic variables for severe malaria.
- Clinical and laboratory criteria from the WHO definition were assessed for frequency and mortality rates.
Main Results:
- The overall mortality rate for pediatric malaria was 3.5%, with 84% of deaths occurring within 24 hours of admission.
- Impaired consciousness, respiratory distress, hypoglycemia, and jaundice were identified as key prognostic indicators.
- A simple bedside index using impaired consciousness and respiratory distress identified 84.4% of fatal cases, outperforming current WHO criteria (79.7%).
Conclusions:
- Impaired consciousness and respiratory distress are critical indicators for identifying African children at high risk of death from malaria.
- These findings support the use of a simplified bedside index for rapid risk assessment in pediatric malaria cases.
- The study highlights the need for improved diagnostic and management strategies for severe malaria in African children.
Background:
About 90 percent of the deaths from malaria are in African children, but criteria to guide the recognition and management of severe malaria have not been validated in them.
Methods:
We conducted a prospective study of all children admitted to the pediatric ward of a Kenyan district hospital with a primary diagnosis of malaria. We calculated the frequency and mortality rate for each of the clinical and laboratory criteria in the current World Health Organization (WHO) definition of severe malaria, and then used logistic-regression analysis to identify the variables with the greatest prognostic value.
Results:
We studied 1844 children (mean age, 26.4 months) with a primary diagnosis of malaria. Not included were 18 children who died on arrival and 4 who died of other causes. The mortality rate was 3.5 percent (95 percent confidence interval, 2.7 to 4.3 percent), and 84 percent of the deaths occurred within 24 hours of admission. Logistic-regression analysis identified four key prognostic indicators: impaired consciousness (relative risk, 3.3; 95 percent confidence interval, 1.6 to 7.0), respiratory distress (relative risk, 3.9; 95 percent confidence interval, 2.0 to 7.7), hypoglycemia (relative risk, 3.3; 95 percent confidence interval, 1.6 to 6.7), and jaundice (relative risk, 2.6; 95 percent confidence interval, 1.1 to 6.3). Of the 64 children who died, 54 were among those with impaired consciousness (n = 336; case fatality rate, 11.9 percent) or respiratory distress (n = 251; case fatality rate, 13.9 percent), or both. Hence, this simple bedside index identified 84.4 percent of the fatal cases, as compared with the 79.7 percent identified by the current WHO criteria.
Conclusions:
In African children with malaria, the presence of impaired consciousness or respiratory distress can identify those at high risk for death.