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Microbiology

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Legionella

Legionella is an infrequent cause of community acquired pneumonia, especially in the context of recent travel.

For suspected Legionella infection, send urine for Legionella antigen testing.

Culture of Sputum / BAL for Legionella can be done but has low sensitivity, particularly after antibiotics.

For guidance on hospital management of community acquired pneumonia, see OUH Adult Antimicrobial Guide

Sample type

Antigen testing:

Urine

Culture:

  • Sputum
  • BAL
  • Transbronchial biopsy
  • Pleural biopsy
  • TBNA

Specimen requirements

Send in a sterile universal container

Minimum volume

0.5ml

Frequency of test

Daily

Turnaround time

Legionella antigen - <24 hours

Legionella culture - 11 days

What to request on EPR

Legionella Ag, urine; Legionella MCS

Last reviewed:14 February 2023

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