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[Morphological changes induced by ampicillin in Campylobacter].

F Hernández1, P Rivera, M L Herrera

  • 1Unidad de Microscopia Electrónica, Universidad de Costa Rica.

Revista De Biologia Tropical
|June 1, 1986
PubMed
Summary
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Ampicillin exposure alters Campylobacter fetus ssp. jejuni morphology, inducing filament-policurved forms. Higher ampicillin concentrations (minimal inhibitory concentration) resulted in more significant morphologic changes in this bacterium.

Area of Science:

  • Microbiology
  • Bacterial Morphology
  • Antimicrobial Resistance

Context:

  • Campylobacter fetus ssp. jejuni is a significant foodborne pathogen.
  • Understanding bacterial responses to antibiotics is crucial for treatment strategies.
  • Ampicillin is a commonly used antibiotic.

Purpose:

  • To investigate the morphologic effects of ampicillin on Campylobacter fetus ssp. jejuni.
  • To determine the relationship between ampicillin concentration and observed morphologic changes.

Summary:

  • Culturing Campylobacter fetus ssp. jejuni in thioglycollate broth with varying ampicillin concentrations (0.1, 1.3, and 10 minimal inhibitory concentration - MIC) revealed dose-dependent morphologic alterations.
  • At 1.3 and 10 MIC, filament-policurved forms increased significantly within the first hour and with prolonged incubation.

Related Experiment Videos

  • The highest ampicillin concentration (10 MIC) induced the most pronounced changes, while 0.1 MIC showed no effect within four hours.

    • Impact:

    • This study highlights ampicillin-induced morphologic plasticity in Campylobacter fetus ssp. jejuni.
    • Findings contribute to understanding bacterial adaptation mechanisms under antibiotic pressure.
    • Provides insights into potential phenotypic changes relevant to antimicrobial resistance studies.