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Legionella Culture

Item Value
Approval req'd? No
Available Stat? No
Test code P125
Test group Legionella
Performed by Microbiology
In House Availability Daily, day and evening shifts
Method Culture
Collection Instructions Nasopharyngeal swab:
Use flocked swab/Universal Transport Medium for collection. Insert swab into the nostril, gently rotating the swab inward until resistance is met at the level of the turbinates. Rotate the swab a few times against the nasopharyngeal wall (approximately 10 sec) and then withdraw swab. Insert swab into container with Universal Transport Medium. Break end of swab so top of vial can be screwed on securely. Appropriately label specimen and send to the laboratory.
Container type Nasopharyngeal swab: Flocked swab in Universal Transport Medium(UTM), Other samples: Sterile, leak-proof container
Sample type Bronchial wash/lavage, endotrachael aspirate, sputum, unfixed tissue, nasopharyngeal swab
Normal range Negative
Critical value Positive culture
Synonyms Bacterial culture; Legionnaires disease
Stability Refrigerated 24 hours
Turn around times Up to 14 days
Additional information Culture is the gold standard and 100% specific, but sensitivity is less than 75%. Inadequate specimens, poor growth characteristics and prior antibiotic use will decrease culture yield.

The sensitivity of PCR tests are estimated to be 80 to 100% for lower respiratory tract specimens and the specificity is >90%.

Order Legionella Culture in conjunction with Legionella PCR test for optimal laboratory diagnosis of Legionella infections.

Legionella Urinary Antigen detects only serotype 1, which accounts for less than half of infections seen at UCSF.
CPT coding 87081
LOINC code 593-4
Last Updated 9/23/2014 8:37:29 AM
Entry Number 598
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