Citation

Behar A, Yuval B, Jurkevitch E. J. Insect Physiol. 2008; 54(9): 1377-1383.

Copyright

(Copyright © 2008, Elsevier Publishing)

DOI

10.1016/j.jinsphys.2008.07.011

PMID

18706909

Abstract

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.

Language: en

Keywords

Animals; Ceratitis capitata; Enterobacteriaceae; Gastrointestinal Tract; Host-Pathogen Interactions; Longevity; Pseudomonas aeruginosa; Symbiosis