Using bacteria to express and display anti-Plasmodium molecules in the mosquito midgut

Michael A. Riehle, Cristina K. Moreira, David Lampe, Carol Lauzon, Marcelo Jacobs-Lorena

Research output: Contribution to journalArticlepeer-review

96 Scopus citations


Bacteria capable of colonizing mosquito midguts are attractive vehicles for delivering anti-malaria molecules. We genetically engineered Escherichia coli to display two anti-Plasmodium effector molecules, SM1 and phospholipase-A(2), on their outer membrane. Both molecules significantly inhibited Plasmodium berghei development when engineered bacteria were fed to mosquitoes 24 h prior to an infective bloodmeal (SM1 = 41%, PLA2 = 23%). Furthermore, prevalence and numbers of engineered bacteria increased dramatically following a bloodmeal. However, E. coli survived poorly in mosquitoes. Therefore, Enterobacter agglomerans was isolated from mosquitoes and selected for midgut survival by multiple passages through mosquitoes. After four passages, E. agglomerans survivorship increased from 2 days to 2 weeks. Since E. agglomerans is non-pathogenic and widespread, it is an excellent candidate for paratransgenic control strategies.

Original languageEnglish (US)
Pages (from-to)595-603
Number of pages9
JournalInternational Journal for Parasitology
Issue number6
StatePublished - May 2007
Externally publishedYes


  • Malaria
  • Mosquito
  • Paratransgenesis
  • PhospholipaseA(2)
  • SM1

ASJC Scopus subject areas

  • Parasitology
  • Infectious Diseases


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