Susceptibility of Arcobacter butzleri to heavy metals

Abstract

The susceptibility of 50 strains of Arcobacter butzleri isolated from chicken liver [12], mussels [18], river water [6] and bovine [5], duck [2] and pelicans [7] feces to mercury (Hg), chromium (Cr), silver (Ag), nickel (Ni), cobalt (Co), iron (Fe), manganese (Mn), molybdenum (Mo) and lead (Pb) was determined. All the strains were resistant to Mo, Mn, Ni, Co, Pb and Fe and susceptible to Hg, Ag and Cr. MIC values showed high variability, indicating a non homogeneous behavior among the strains.

Zinc bioaccumulation by microbial consortium isolated from nickel smelter sludge disposal site

“…Schmidt and Schlegel (1989) who studied the effects of Ni(II) and Co(II) on several bacteria isolated from metal contaminated soils, have also reported that bacterial resistance to Co(II) is lower compared to Ni(II) resistance. Arthrobacter butzleri has been reported to be more sensitive to Ni(II) than to Co(II) (Otth et al 2005). Microbial consortium obtained was tested for the heavy metal bioaccumulation using zinc as a model.…”

Kinetic responses of activated sludge to individual and joint nickel (Ni(II)) and cobalt (Co(II)): An isobolographic approach

“…Spingael et al [60], reported that they managed to construct (by plasmid transfer) several stains of Alcaligenes eutrophus able to degrade haloaromatic compounds in a growth medium containing 1 mM Ni(II) (=58.71 mg(Ni) L −1 ). Otth et al [61], have experimentally estimated the minimal inhibition concentration of Ni(II) on 49 strains of Arcobacter butzleri to lie just below 4 mM (=236 mg L −1 ), while for one strain it was found to be just below 8 mM (=472 mg L −1 ). In accordance with the results in the present work, Ainsworth et al [9], who worked with batch cultures of Klebsiella pneumoniae, concluded that an increase of the Ni(II) concentration resulted, both, to prolonged lag times, and to a decrease of the final MLSS concentration.…”

A conservative region of the mercuric reductase gene (merA) as a molecular marker of bacterial mercury resistance

“…Bacterial mercury resistance has been found in a wide range of Gramnegative and Gram-positive bacteria. The operon varies in the number of genes present and is usually located on plasmids (3,5,8,19,25) and chromosomes (4,13,18,28); they are often components of transposons (5,11,15,20) and integrons (4,13,18) in a striking diversity of arrangements, often involving duplications and distributions of the enzymes, transporters or regulators among several replicons in one cell. Moreover, two major mer genes, the regulator merR and the merA, which codes the NADPH-dependent flavoenzyme mercuric reductase [E.C.…”