Nongenetic Adaptation of Bacillus Cereus 569H to Tetracycline

Connamacher, Robert H.

doi:10.1007/978-3-642-49267-9_49

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…In almost all of the water and sediment samples, the numbers of tetracycline-and streptomycin-resistant strains were larger than for those resistant to chloramphenicol. Because Mg2+ had been shown to inhibit the activity of tetracycline (5,10), the basal medium was changed. Thereafter, the number and percentage oftetracycline-resistant strains declined.…”

Section: Discussionmentioning

confidence: 99%

Plasmids Carried by Antibiotic-Resistant Marine Bacteria

Sizemore

Colwell

1977

Antimicrob Agents Chemother

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Antibiotic-resistant bacteria were isolated from seawater samples collected in the Atlantic Ocean off the southeastern coast of the United States. Large numbers of antibiotic-resistant bacterial strains were found to be present in harbor and inshore waters; however, the percentage of resistant strains was higher for several seawater samples collected offshore than for those collected near shore. Bacteria resistant to tetracycline, chloramphenicol, and streptomycin were found in nearly all samples collected, including samples from 200 miles (about 522 km) offshore and at depths to 8,200 m. Sediment samples, in general, were found to contain smaller populations of resistant strains as compared with the seawater samples examined. Antibiotic-resistant bacteria exhibiting phenetic characteristics common to autochthonous marine bacterial species were examined in detail, and several of the isolates exhibited unstable antibiotic resistance, which was transferable to recipientEscherichia coli cells. Deoxyribonucleic acid preparations from 10 strains examined by ethidium bromide-cesium chloride density sedimentation revealed that 6 of the strains contained covalently closed circular plasmid deoxyribonucleic acid.

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Section: Discussionmentioning

confidence: 99%

Plasmids Carried by Antibiotic-Resistant Marine Bacteria

Sizemore

Colwell

1977

Antimicrob Agents Chemother

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“…Of interest, earlier work on the adaptation of Bacillus cereus to tetracycline almost certainly seems to be attributable to the induction of an active efflux system (12).…”

Section: Identifying Active Effluxmentioning

confidence: 99%

Active efflux mechanisms for antimicrobial resistance

Levy

1992

Antimicrob Agents Chemother

447

310

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“…Phenotypic adaptations of bacterial populations to resist growth-inhibitory drugs have been observed in E. coli (18), Staphylococcus aureus (26), and Bacillus cereus (6). In these VOL.…”

Section: Resultsmentioning

confidence: 99%

Bacteriological Studies with Morphine-Like Narcotics: Relevance to Narcotic Actions in Mammals?

Wolfe

Olenick

Hahn

1975

Antimicrob Agents Chemother

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A search for active bacterial growth inhibitors among seven highly potent morphine-like narcotics revealed that NIH 7591 and etorphine inhibited the rates of growth of Escherichia coli by 50% at 1.9 x 10-4 M. Bacterial cultures escaped from growth inhibition by NIH 7591 after times which were proportional to the drug concentrations and inversely proportional to the initial bacterial densities. Populations of E. coli could adapt to resist and cross-resist growth inhibitions by NIH 7591 and phenazocine. Resistance was lost after growth in drug-free medium for a few doubling times. The agonist-antagonist pair, etorphine and diprenorphine, inhibited growth of E. coli additively without any indication of antagonism. Actions of narcotics in bacteria is considered a theme in its own right.

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Nongenetic Adaptation of Bacillus Cereus 569H to Tetracycline

Cited by 5 publications

References 8 publications

Plasmids Carried by Antibiotic-Resistant Marine Bacteria

Plasmids Carried by Antibiotic-Resistant Marine Bacteria

Active efflux mechanisms for antimicrobial resistance

Bacteriological Studies with Morphine-Like Narcotics: Relevance to Narcotic Actions in Mammals?

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