[1] UFR St Antoine, Dept Bacteriol, F-75012 Paris, France
[2] Univ Sci & Technol Houari Boumediene, Biol Cellulaire & Mol Lab, Fac Biol Sci, Algiers 16111, Algeria
[3] Univ Paris 06, Fac Med Pierre & Marie Curie, Bacteriol Lab, UPRES EA 2392, Paris, France