Volume 84, Issue 2_Suppl
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Malaria infection induces antibodies capable of suppressing the infectivity of gametocytes and gametes, however, little is known about the duration of the antibody response, the parasite specificity, and the role of complement. We report the analyses of the transmission-blocking (TB) activity of sera collected from 105 -infected and 44 non-infected individuals from a malaria endemic region of Colombia, using a membrane feeding assay in mosquitoes. In infected donors we found that TB activity was antibody dose dependent (35%), lasted for 2–4 months after infection, and in 70% of the cases different wild isolates displayed differential susceptibility to blocking antibodies. Additionally, in a number of assays TB was complement-dependent. Twenty-seven percent of non-infected individuals presented TB activity that correlated with antibody titers. Studies here provide preliminary data on factors of great importance for further work on the development of TB vaccines.


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  • Received : 08 Feb 2010
  • Accepted : 07 Apr 2010
  • Published online : 04 Feb 2011

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