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Mechanisms of Action: Physiological Effects

Atomic Force Microscopy: Application to Investigation of Escherichia coli Morphology before and after Exposure to Cefodizime

Pier Carlo Braga, Davide Ricci
Pier Carlo Braga
Center for Respiratory Pharmacology, School of Medicine, University of Milan, Milan,and
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Davide Ricci
Department of Biophysical Electronic Engineering, University of Genoa, Genoa, Italy
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DOI: 10.1128/AAC.42.1.18
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    Fig. 1.

    Schematic diagram of an atomic force microscope.

  • Figure2
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    FIG. 2–4. AFM images of E. coli under different conditions.

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    Fig. 2.

    Common morphology of E. coli without exposure to cefodizime. Bars, 500 nm.

  • FIG. 3 and 4. Example of bacterial damage after exposure to supra-MICs of cefodizime. Bars, 500 nm.

  • FIG. 5–7. AFM images of E. coliunder different conditions.

  • Fig. 5.

    Example of bacterial flattening and emptying after exposure to supra-MICs of cefodizime. Bars, 500 nm.

  • Fig. 6.

    E. colifilamentation following exposure to sub-MICs of cefodizime. Bars, 500 nm.

  • Fig. 7.

    Filamentation and bulge formation in E. coli after exposure to sub-MICs of cefodizime. Bars, 500 nm.

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    Fig. 8.

    Example of height and size measurements of selected cross-section in a damaged bacterium (f, fimbria).

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Atomic Force Microscopy: Application to Investigation of Escherichia coli Morphology before and after Exposure to Cefodizime
Pier Carlo Braga, Davide Ricci
Antimicrobial Agents and Chemotherapy Jan 1998, 42 (1) 18-22; DOI: 10.1128/AAC.42.1.18

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Atomic Force Microscopy: Application to Investigation of Escherichia coli Morphology before and after Exposure to Cefodizime
Pier Carlo Braga, Davide Ricci
Antimicrobial Agents and Chemotherapy Jan 1998, 42 (1) 18-22; DOI: 10.1128/AAC.42.1.18
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KEYWORDS

cefotaxime
cephalosporins
Escherichia coli
Microscopy, Atomic Force

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