| [seroprevalence of antibodies against plasmodium falciparum in volunteer donors from various cities in venezuela]. | the prevalence of antibodies to plasmodium falciparum was studied in 890 blood donors from different geographical areas of venezuela. the overall prevalence, as established by elisa, was (1.7%). seropositivity was higher in those samples obtained in sucre (2.5%) and apure (1.7%) states both with foci of malaria transmission. it is proposed that medical history should be reinforced by screening antimalarial antibodies in donors at risk. | 1992 | 1621185 |
| comparison of the diagnosis of malaria by microscopy, immunochromatography and pcr in endemic areas of venezuela. | whole blood samples (n = 295) were obtained from different locations in amazonas and sucre states, in venezuela. malaria was diagnosed by microscopy, optimal and polymerase chain reaction (pcr), with plasmodium vivax, p. falciparum, and p. malariae being detected when possible. we identified 93 infections, 66 of which were caused by p. vivax, 26 by p. falciparum, and 1 was a mixed infection. no infection caused by p. malariae was detected. the sensitivity and specificity of each diagnostic metho ... | 2007 | 17401497 |
| haemoglobin and haematocrit: the threefold conversion is also non valid for assessing anaemia in plasmodium vivax malaria-endemic settings. | it has been recently reported that the standard threefold conversion from haematocrit to haemoglobin underestimates the prevalence of anaemia and low levels of haemoglobin in children living in areas endemic for plasmodium falciparum malaria. the data presented herein describes the experience in a malaria-endemic zone in northeastern venezuela (state of sucre), where a similar bias between haematocrit and haemoglobin in patients with plasmodium vivax infection was found. in summary, the relation ... | 2007 | 18086306 |
| malaria seroprevalence in blood bank donors from endemic and non-endemic areas of venezuela. | in venezuela, a total of 363,466 malaria cases were reported between 1999-2009. several states are experiencing malaria epidemics, increasing the risk of vector and possibly transfusion transmission. we investigated the risk of transfusion transmission in blood banks from endemic and non-endemic areas of venezuela by examining blood donations for evidence of malaria infection. for this, commercial kits were used to detect both malaria-specific antibodies (all species) and malaria antigen (plasmo ... | 2011 | 21537669 |