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Observations on Aeromonas hydrophila septicaemia in a patient with leukaemia
  1. E. Abrams,
  2. C. H. Zierdt,
  3. J. A. Brown
  1. Clinical Pathology Department, Clinical Center, National Institutes of Health, Bethesda, Maryland, USA
  2. Laboratory of Chemical Pharmacology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA


    A Gram-negative bacillus isolated from the blood of a leukaemic patient with septicaemia was identified on the basis of common tests as Escherichia coli. However, the organism's antibiogram was atypical of E. coli and led to its re-examination and correct identification as Aeromonas hydrophila. A. hydrophila is sensitive to chloramphenicol and tetracycline, characteristics useful in differentiation from E. coli. A simple test differentiating this organism from the Enterobacteriaceae is the oxidase test. A. hydrophila is oxidase positive.

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