Precipitation of Silver-Thiosulfate Complex and Immobilization of Silver by
Cupriavidus metallidurans CH34
Marie-Laure Ledrich1, Sébastien Stemmler1, Philippe Laval-Gilly1 
, Laurent Foucaud1 and Jaïro Falla1
| (1) |
IUT Thionville-Yutz, Laboratoire d’Immunologie – Microbiologie (ESE-CNRS, UMR 7146), 1 Impasse Alfred Kastler, 57970 Yutz, France |
Received: 28 July 2005 Accepted: 7 October 2005
Abstract Cupriavidus metallidurans CH34 is a facultative chemolithotrophic bacterium that possesses two megaplasmids (
pMOL28 and
pMOL30) that confer resistance to eleven metals. The ability of
Cupriavidus metallidurans CH34 to resist silver is described here. Electronic microscopy, energy-dispersive X-ray (EDX) and X-ray diffractometry (DRX)
observations revealed that
C. metallidurans CH34 strongly associated silver with the outer membrane, under chloride chemical form. Using derivate strains of
C. metallidurans CH34, which carried only one or no megaplasmid, we show that this resistance seems to be carried by
pMOL30.
Key words Cupriavidus metallidurans CH34 - plasmid pMOL30 - silver
References secured to subscribers.