PMID: 39494May 1, 1979

Enrichment of cadmium-mediated antibiotic-resistant bacteria in a Douglas-fir (Pseudotsuga menziesii) litter microcosm

Applied and Environmental Microbiology
B Lighthart

Abstract

A set of Douglas-fir needle litter microcosms was amended with cadmium, acid, a combination of both, or neither. After 2 weeks of incubation, bacterial colony counts were made of litter homogenates inoculated onto agar media containing an antibiotic (streptomycin, chloromycetin, ampicillin, or gentamicin), cadmium, both, or neither. In all microcosms bacterial abundance was similar but the quality was very dissimiliar. Cadmium-treated microcosms had populations enriched for cadmium and gentamicin resistance and streptomycin and chloramphenicol sensitivity. Acid amendment had no consistent effect on the microcosm populations except that which could be attributed to the cadmium treatment amendment alone.

Related Concepts

Antibiotic Resistance, Microbial
Gentamicins
Agar
Cadmium Measurement
Pseudotsuga menziesii
Chloromycetin
Streptomycin
Gentamicin Measurement
Soil Microbiology
Ampicillin

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