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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 109, No. 5, 2014, pp. 569-576
Bioline Code: oc14090
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 109, No. 5, 2014, pp. 569-576

 en Influence of age on the haemoglobin concentration of malaria-infected patients in a reference centre in the Brazilian Amazon
Siqueira, Andre M.; Cavalcante, Janieldo A.; Vítor-Silva, Shelia; Reyes-Lecca, Roberto C.; Alencar, Aline C; Monteiro, Wuelton M; Alexandre, Márcia A. A.; Mourão, Maria Paula G.; Guinovart, Caterina; Bassat, Quique; Alecrim, Maria das Graças C. & Lacerda, Marcus V. G.


Anaemia is amongst the major complications of malaria, a major public health problem in the Amazon Region in Latin America. We examined the haemoglobin (Hb) concentrations of malaria-infected patients and compared it to that of malaria-negative febrile patients and afebrile controls. The haematological parameters of febrile patients who had a thick-blood-smear performed at an infectious diseases reference centre of the Brazilian Amazon between December 2009-January 2012 were retrieved together with clinical data. An afebrile community control group was composed from a survey performed in a malaria-endemic area. Hb concentrations and anaemia prevalence were analysed according to clinical-epidemiological status and demographic characteristics. In total, 7,831 observations were included. Patients with Plasmodium falciparum infection had lower mean Hb concentrations (10.5 g/dL) followed by P. vivax-infected individuals (12.4 g/dL), community controls (12.8 g/dL) and malaria-negative febrile patients (13.1 g/dL) (p < 0.001). Age, gender and clinical-epidemiological status were strong independent predictors for both outcomes. Amongst malaria-infected individuals, women in the reproductive age had considerably lower Hb concentrations. In this moderate transmission intensity setting, both vivax and falciparum malaria are associated with reduced Hb concentrations and risk of anaemia throughout a wide age range.

malaria; anaemia; haemoglobin; Plasmodium vivax; Plasmodium falciparum

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