Gut bacterial communities in the Mediterranean fruit fly (Ceratitis capitata) and their impact on host longevity

A. Behar*, B. Yuval, E. Jurkevitch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

160 Scopus citations


Fruit flies (Diptera: Tephritidae) harbor stable bacterial communities in their digestive system, composed mainly of members of the Enterobacteriaceae. However, the Enterobacteriaceae are not the sole community in this habitat. We examined the hypothesis that Pseudomonas spp. form a cryptic community in the gut of Ceratitis capitata, the Mediterranean fruit fly ('medfly'). Suicide polymerase restriction PCR (SuPER PCR), a novel culture-independent technique, revealed that Pseudomonas spp. form minor, common and stable communities within the medfly's gut. These include P. aeruginosa, a known pathogen of arthropods. Experimental inoculations with high levels of P. aeruginosa reduced the medfly's longevity while inoculations with members of the Enterobacteriaceae extended the fly's life. Accordingly, we suggest that in addition to their possible contribution to the fly's nitrogen and carbon metabolism, development and copulatory success (as shown in previous studies), the Enterobacteriaceae community within the medfly's gut may also have an indirect contribution to host fitness by preventing the establishment or proliferation of pathogenic bacteria.

Original languageAmerican English
Pages (from-to)1377-1383
Number of pages7
JournalJournal of Insect Physiology
Issue number9
StatePublished - Sep 2008

Bibliographical note

Funding Information:
We thank Batia Kamenski for technical assistance. This work was supported by the Binational Agricultural Research and Development Fund (BARD) (grant 3636-04).


  • Ceratitis capitata
  • Enterobacteriaceae
  • Gut microbiology
  • Pseudomonas aeruginosa


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