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Applied and Environmental Microbiology, October 2000, p. 4595-4597, Vol. 66, No. 10
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Antibacterial Activity Evaluation of Microcin J25
against Diarrheagenic Escherichia coli
Sophie
Sable,
Anne-Marie
Pons,
Sandrine
Gendron-Gaillard, and
Gilles
Cottenceau*
Laboratoire de Génie Protéique et
Cellulaire, Pôle Sciences, Université de La Rochelle,
La Rochelle, France
Received 23 February 2000/Accepted 7 July 2000
The inhibitory activities of known microcins were evaluated against
some diarrheagenic Escherichia coli strains. Some
antibacterial properties of microcin J25, the most active one, were
studied. A rapid two-step purification was performed. The
MIC and the minimum bactericidal concentration of J25 against E. coli O157:H7 were 1 and 100 µg ml
1, respectively.
A 104-CFU ml
1 contamination by this strain
was destroyed in milk and meat extract by 6.25 µg of J25
ml
1 and in half-diluted egg yolk by 50 µg of J25
ml
1.
*
Corresponding author. Mailing address: LGPC, Pôle
Sciences, Université de La Rochelle, Avenue Marillac, 17042 La
Rochelle, France. Phone: 33-546-458-246. Fax: 33-546-458-247. E-mail:
gilles.cottenceau{at}univ-lr.fr.
Applied and Environmental Microbiology, October 2000, p. 4595-4597, Vol. 66, No. 10
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
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