Abstract
Nine strains of the Legionnaires' bacterium produced a β-lactamase that was basically a cephalosporinase, but which also had some effect on all the penicillins tested. Cefoxitin, cefuroxime, and cephalexin were resistant to the enzyme. Minimal inhibitory and bactericidal concentrations were very similar.
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Thornsberry, C., Kirven, L.A. β-Lactamase of the Legionnaires' bacterium. Current Microbiology 1, 51–54 (1978). https://doi.org/10.1007/BF02601708
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DOI: https://doi.org/10.1007/BF02601708