Related Experiment Video
Updated: Mar 11, 2026
Author Spotlight: Developing a Point-of-Care Hemoglobin Estimation Method for Anemia Management
Published on: January 19, 2024
Severe anemia in Malawian children
Job Cj Calis1, Kamija S Phiri2, E Brian Faragher3
1Malawi-Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi; College of Medicine, University of Malawi, Blantyre, Malawi; Emma Children's Hospital, the Global Child Health Group, Academic Medical Center, Amsterdam, The Netherlands.
Insights
Severe anemia in Malawian children has multiple causes including infections and vitamin deficiencies. Iron and folate deficiencies are not primary drivers, even with malaria present.
Area of Science:
- Pediatric infectious diseases
- Nutritional deficiencies
- Hematology
Background:
- Severe anemia significantly contributes to morbidity and mortality in African children.
- The etiological factors underlying severe anemia in this vulnerable population remain understudied.
Purpose of the Study:
- To investigate the diverse causes of severe anemia in preschool children in Malawi.
- To identify associated risk factors using robust statistical methods.
Main Methods:
- A case-control study involving 381 children with severe anemia and 757 controls.
- Multivariate analysis and structural equation modeling were employed to analyze causal factors.
Main Results:
- Bacteremia, malaria, hookworm, HIV, G6PD deficiency, vitamin A, and vitamin B12 deficiencies were significantly associated with severe anemia.
- Iron deficiency was not prevalent and showed a negative association with bacteremia. Hookworm infections were common in children under two.
Conclusions:
- Multiple factors contribute to severe anemia in Malawian children.
- Folate and iron deficiencies are not prominent causes; alternative factors should be considered, even in malaria-endemic areas.
Background:
Severe anemia is a major cause of sickness and death in African children, yet the causes of anemia in this population have been inadequately studied.
Methods:
We conducted a case-control study of 381 preschool children with severe anemia (hemoglobin concentration, <5.0 g per deciliter) and 757 preschool children without severe anemia in urban and rural settings in Malawi. Causal factors previously associated with severe anemia were studied. The data were examined by multivariate analysis and structural equation modeling.
Results:
Bacteremia (adjusted odds ratio, 5.3; 95% confidence interval [CI], 2.6 to 10.9), malaria (adjusted odds ratio, 2.3; 95% CI, 1.6 to 3.3), hookworm (adjusted odds ratio, 4.8; 95% CI, 2.0 to 11.8), human immunodeficiency virus infection (adjusted odds ratio, 2.0; 95% CI, 1.0 to 3.8), the G6PD-202/-376 genetic disorder (adjusted odds ratio, 2.4; 95% CI, 1.3 to 4.4), vitamin A deficiency (adjusted odds ratio, 2.8; 95% CI, 1.3 to 5.8), and vitamin B12 deficiency (adjusted odds ratio, 2.2; 95% CI, 1.4 to 3.6) were associated with severe anemia. Folate deficiency, sickle cell disease, and laboratory signs of an abnormal inflammatory response were uncommon. Iron deficiency was not prevalent in case patients (adjusted odds ratio, 0.37; 95% CI, 0.22 to 0.60) and was negatively associated with bacteremia. Malaria was associated with severe anemia in the urban site (with seasonal transmission) but not in the rural site (where malaria was holoendemic). Seventy-six percent of hookworm infections were found in children under 2 years of age.
Conclusions:
There are multiple causes of severe anemia in Malawian preschool children, but folate and iron deficiencies are not prominent among them. Even in the presence of malaria parasites, additional or alternative causes of severe anemia should be considered.
More Related Videos
07:27A Simple Protocol for Platelet-mediated Clumping of Plasmodium falciparum-infected Erythrocytes in a Resource Poor Setting
Published on: May 16, 2013
05:23Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload
Published on: March 14, 2017
