Pathophysiology of Anemia in HIV-Infected Children Exposed to Malaria

Cinta Moraleda ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain;
Manhiça Health Research Center (CISM), Manhiça, Mozambique;

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Ruth Aguilar ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain;
Manhiça Health Research Center (CISM), Manhiça, Mozambique;
CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain;

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Llorenç Quintó ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain;

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Tacilta Nhampossa Manhiça Health Research Center (CISM), Manhiça, Mozambique;

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Montserrat Renom ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain;
Manhiça Health Research Center (CISM), Manhiça, Mozambique;

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Augusto Nhabomba Manhiça Health Research Center (CISM), Manhiça, Mozambique;

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María Ruperez ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain;
Manhiça Health Research Center (CISM), Manhiça, Mozambique;

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John J. Aponte ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain;
Manhiça Health Research Center (CISM), Manhiça, Mozambique;

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Ariel H. Achtman Walter and Eliza Hall Institute for Medical Research, Victoria, Australia;
Department of Medical Biology, The University of Melbourne, Victoria, Australia;

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María del Mar Mañú Pereira Red Blood Cell Pathology- Centre for Rare Diseases, Vall d’Hebron Research Institute, University Hospital Vall d’Hebron, Barcelona, Spain;

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Louis Schofield Walter and Eliza Hall Institute for Medical Research, Victoria, Australia;
Department of Medical Biology, The University of Melbourne, Victoria, Australia;
Australian Institute of Tropical Health and Medicine, James Cook University, Douglas, Australia;

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Pedro L. Alonso ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain;
Manhiça Health Research Center (CISM), Manhiça, Mozambique;

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Eusebio Macete Manhiça Health Research Center (CISM), Manhiça, Mozambique;
National Directorate of Health, Ministry of Health, Maputo, Mozambique

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Clara Menéndez ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain;
Manhiça Health Research Center (CISM), Manhiça, Mozambique;
CIBER Epidemiology and Public Health (CIBERESP), Barcelona, Spain;

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ABSTRACT

Anemia is a common condition in HIV-infected children; however, its pathophysiology and the contribution of frequent causes of anemia such as iron deficiency (ID) and malaria are poorly understood. We carried out an ancillary study on the effect of HIV on anemia as part of a case–control study on risk factors of anemia among Mozambican children aged 1–59 months with documented HIV status. Of them, 390 children were admitted to the hospital with anemia (hemoglobin [Hb] < 11 g/dL), whereas 272 children without anemia (Hb ≥ 11 g/dL) were recruited in the community. We assessed differences by HIV status in the presentation of anemia etiological factors and the effect of HIV infection on the association of each factor with anemia. Among the 99 HIV-infected and 563 uninfected children included, HIV-infected anemic children had an increased risk of undernutrition (P < 0.0001), Epstein–Barr virus infection (P < 0.0001), bacteremia (P = 0.0060), a decreased risk of malaria (P < 0.0001), and a similar risk of ID (P = 0.7371) compared with anemic-uninfected children. HIV-infected children were significantly less likely to have anemia associated with Plasmodium falciparum hyperparasitemia (P = 0.0444) and had a lower prevalence of parasitemia in the bone marrow (BM) (P < 0.0001) than anemic-uninfected children. Levels of BM erythropoiesis and dyserythropoiesis were comparable between groups. These findings suggest that the pathophysiology of anemia among HIV-infected malaria-exposed children is not related to HIV-specific effects. For unclear reasons, HIV-infected children had reduced risk of malaria infection, whereas ID prevalence was comparable in HIV-infected and uninfected children, suggesting that iron supplementation recommendations should not be different in HIV-infected children.

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Author Notes

Address correspondence to Cinta Moraleda, ISGlobal, Hospital Clínic - Universitat de Barcelona, Rosselló 132, 5th floor, Barcelona E-08036, Spain. E-mail: cinta.moraleda@isglobal.org

Financial support: This study was funded by the Agencia de Cooperación Internacional de Las Illes Balears, Spain, and the Fundación Ramón Areces. The Centro de Investigaçaõ em Saúde de Manhiça receives core funding from the Spanish Agency for International Cooperation and Development (AECID). The Walter and Eliza Hall Institute receives Victorian State Government Operational Infrastructure Support and Australian Government NHMRC IRIISS. L. S. received support as an International Research Scholars of the Howard Hughes Medical Institute and from NHMRC program grant #637406. AHA received support from the Victorian Community Foundation-the George Perry Fund.

Authors’ addresses: Cinta Moraleda, ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain, and Pediatric Infectious Diseases Unit, Instituto de investigación Hospital, RiTiP, Hospital Universitario, Universidad Complutense, Madrid, Spain, E-mail: cinta.moraleda@isglobal.org. Ruth Aguilar, Llorenç Quintó, Montserrat Renom, John J. Aponte, and Clara Menéndez, ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain, E-mails: ruth.aguilar@isglobal.org, llorenc.quinto@isglobal.org, montse.renom034@gmail.com, john.aponte@isglobal.org, and clara.menendez@isglobal.org. Tacilta Nhampossa, Augusto Nhabomba, and Eusebio Macete, Manhiça Health Research Center (CISM), Manhiça, Mozambique, E-mails: tacilta.nhampossa@manhica.net, augusto.nhabomba@gmail.com, and eusebio.macete@manhica.net. María Ruperez, London School of Hygiene and Tropical Medicine, London, United Kingdom, E-mail: maria.ruperez@lshtm.ac.uk. Ariel H. Achtman and Louis Schofield, Walter and Eliza Hall Institute for Medical Research, Parkville, Australia, E-mails: arielachtman@hotmail.com and louis.schofield@jcu.edu.au. María del Mar Mañú Pereira, Red Blood Cell Pathology- Centre for Rare Diseases, Vall d’Hebron Research Institute, University Hospital Vall d’Hebron, Barcelona, Spain, E-mail: mar.manu@vhir.org. Pedro L. Alonso, ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain, and Global Malaria Programme, WHO, Geneva, Switzerland, E-mail: alonsop@who.int.

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