Fig. 1
From: Post-exposure serological responses to malaria parasites in potential blood donors
Distribution of levels of total anti-Plasmodium spp. antibodies, according to a ELISA results: seropositive (n = 67); seronegative (n = 435) and inconclusive (n = 3); b distribution of levels of total anti-Plasmodium spp. antibodies of the seropositive group, according to age groups: <31 years old (10/67; 14.9%); 31–40 years old (7/67; 10.4%); 40–51 years old (24/67; 35.8%); ≥51 years old (26/67; 38.8%); c Distribution of levels of total anti-Plasmodium spp. antibodies of the seropositive group, according to the length of time since the last stay in endemic areas of malaria: <4 months (34/67; 50.7%); 4 months–1 year (5/67; 7.5%); 1–3 years (4/67; 6%); ≥3 years (24/67; 35.8%)