SciELO - Scientific Electronic Library Online

 
vol.41 issue2Effect of the inoculant strain Sphingomonas paucimobilis 20006FA on the bacterial composition of a phenanthrene-degrading consortiumIn vitro amplification of BVDV field strains isolated in Argentina: effect of cell line and culture conditions author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

  • Have no cited articlesCited by SciELO

Related links

Share


Revista argentina de microbiología

Print version ISSN 0325-7541On-line version ISSN 1851-7617

Abstract

GONZALEZ, R. H.; DIJKSHOORN, L.; VAN DEN BARSELAAR, M.  and  NUDEL, C.. Quorum sensing signal profile of Acinetobacter strains from nosocomial and environmental sources. Rev. argent. microbiol. [online]. 2009, vol.41, n.2, pp.73-78. ISSN 0325-7541.

A set of 43 strains corresponding to 20 classified and unclassified genomic Acinetobacter species was analyzed for the production of typical N-acyl homoserine lactone quorum sensing molecules in culture broths. A large percentage of the strains (74%) displayed quorum sensing signals that could be separated into three statistically significantly different chromatographic groups (p < 0.001) based on their retention factor in TLC, i.e. Rf1 (0.22 ± 0.02); Rf2 (0.40 ± 0.02) and Rf3 (0.54 ± 0.02). Noteworthy, 63% of the strains tested produced more than one quorum signal. The frequency of signal appearance was Rf3 > Rf2 > Rf1. None of the three signals could be specifically assigned to a particular species in the genus; furthermore, no distinction could be made between the quorum sensing signals secreted by typical opportunistic strains of the A. calcoaceticus-A. baumannii complex, isolated from patients, with respect to the other species of the genus, except for the Rf1 signal which was present in all the QS positive strains belonging to this complex and DNA group 13 TU. In conclusion, quorum sensors in Acinetobacter are not homogenously distributed among species and one of them is present in most of the A. calcoaceticus-baumannii complex.

Keywords : Acinetobacter; Quorum sensing; Acyl homoserine lactone; Nosocomial strains; Environmental strains.

        · abstract in Spanish     · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License