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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 103, No. 7, 2008, pp. 668-673
Bioline Code: oc08121
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 103, No. 7, 2008, pp. 668-673

 en Asymptomatic Plasmodium check for this species in other resources spp. infection in Tierralta, Colombia
Cucunubá, Zulma Milena; Guerra, Ángela Patricia; Rahirant, Sonia Judith; Rivera, Jorge Alonso; Cortés, Liliana Jazmín & Nicholls, Rubén Santiago

Abstract

With the aim of determining the prevalence of asymptomatic Plasmodium check for this species in other resources spp. infection by thick smear and PCR and its association with demographic and epidemiological characteristics in the village of Nuevo Tay, Tierralta, Córdoba, Colombia, a cross-sectional population study was carried out, using random probabilistic sampling. Venous blood samples were taken from 212 people on day 0 for thick smear and PCR. Clinical follow-up and thick smears were carried out on days 14 and 28. The prevalence of Plasmodium spp. infection was 17.9% (38/212; 95% CI: 12.5-23.3%) and the prevalence of asymptomatic Plasmodium spp. infection was 14.6% (31/212; 95% CI: 9.6-19.6%). Plasmodium vivax check for this species in other resources was found more frequently (20/31; 64.5%) than Plasmodium falciparum check for this species in other resources (9/31; 29%) and mixed infections (2/31; 6.5%). A significantly higher prevalence of asymptomatic infection was found in men (19.30%) than in women (9.18%) (prevalence ratio: 2.10; 95% CI: 1.01-4.34%; p = 0.02). People who developed symptoms had a significantly higher parasitemia on day 0 than those who remained asymptomatic, of 1,881.5 ± 3,759 versus 79 ± 106.9 (p = 0.008). PCR detected 50% more infections than the thick smears. The presence of asymptomatic Plasmodium spp. infection highlights the importance of carrying out active searches amongst asymptomatic populations residing in endemic areas.

Keywords
malaria - Colombia - Plasmodium spp. - asymptomatic infection - PCR - thick smear

 
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