Evolution toward high-level fluoroquinolone resistance in Francisella species

Abstract excerpt

OBJECTIVES: Francisella tularensis, a CDC class A potential bioterrorism agent, is a Gram-negative bacterium responsible for tularaemia. Understanding the mechanisms of resistance to antibiotics used as first-line treatment is of major security relevance. METHODS: We propagated the three parental reference strains Francisella tularensis subsp. holarctica live vaccine strain, Francisella novicida and Francisella...

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