Francisella tularensis

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The page below is a sample from the LabCE course Preliminary Identification of the Primary Select Agents of Bioterrorism. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Francisella tularensis

Francisella tularensis is a dangerous, highly infectious organism that can cause laboratory-acquired infections. It should NOT be manipulated on an open bench.

Catalase: F. tularensis is weakly catalase positive. Catalase testing MUST be performed with extreme caution in a biosafety cabinet (BSC) due to the creation of aerosols.

Oxidase: Negative

Beta-lactamase: Positive

Urease: Negative

XV factors: Not required for growth

Important note: F. tularensis is often incorrectly identified on automated identification systems. These systems may key out as Haemophilus influenzae or Actinobacillus species.