JAC Advance Access originally published online on April 25, 2003
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Journal of Antimicrobial Chemotherapy (2003) 51, 1365-1371
© 2003 The British Society for Antimicrobial Chemotherapy
The bacteriocin piscicolin 126 retains antilisterial activity in vivo
CSIRO Livestock Industries, Private Bag 24, Geelong, Victoria 3220, Australia
Received 27 November 2002; returned 23 January 2003; revised 20 February 2003; accepted 25 February 2003
Objective: We have conducted a series of experiments to show that the bacteriocin piscicolin 126 (P126) retains antilisterial activity after injection into a mouse.
Methods: Groups of mice were challenged intravenously with Listeria monocytogenes and treated with purified P126 at varying times before and after challenge to determine whether administration of this peptide reduced numbers of colonizing L. monocytogenes and the symptoms of listeriosis.
Results: The bacteriocin P126 retained antilisterial activity after injection into the mouse. During the early time-points of listerial infection, the purified P126 was found to significantly reduce the listerial load in the liver and spleen and, further, that this reduction translated to reduced clinical signs of disease.
Conclusions: This is the first report of a Class IIA bacteriocin displaying in vivo antimicrobial activity. Such a result provides preliminary evidence that this class of molecules may be useful in controlling systemic bacterial infections.
Keywords: bacteriocin, in vivo activity, piscicolin 126
* Corresponding author. Tel: +61-3-5227-5752; Fax: +61-3-5227-5555; E-mail: aaron.ingham@csiro.au
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