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HelpTest Code Urine S Pneumo & Legion Urine Rapid Strep Pneumo & Legionella Ag
Aliases
Urine Strep Pneumo, Urine Legionella
Useful For
It is intended, in conjunction with culture and other methods, to aid in the diagnosis of pneumococcal pneumonia and presumptive diagnosis of Legionella infection (Legionnaires’ Disease) caused by L. pneumophila serogroup 1.
Patient Preparation
No special patient preparation required
Collection Method
Urine in a sterile container
Minimum Volume
1 mL
Container
Sterile Cup
Preferred Specimen
Urine, no additives
Acceptable Specimens
Urine, no additives
Reference or Target Ranges
Negative – See notes
Reportable Units
Positive/Negative
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | N/A |
| Icterus Threshold | N/A |
| Lipemia Threshold | N/A |
| Other | QNS, grossly bloody urine, urine received in an additive (no tiger top urine containers), improperly labeled, improper container. |
Specimen Stability
| Ambient | 24 hours |
| Refrigerated (2°C to 8°C) | 7 days |
| Frozen (-20°C to -10°C) | 7 Days |
Performance Information
| Days and Time Performed | Daily |
| Expected Turn Around Time | Routine: Within 4 hours of arrival in lab |
| Stat Availabilty | No |
| Performing Bench | APG Microbiology |
| Methodology/Method Description | The ImmuView S. pneumoniae and L. pneumophila Urinary Antigen Test is an in vitro, rapid, lateral flow test, also known as a lateral flow immunochromatographic assay, intended for the qualitative detection of Streptococcus pneumoniae and Legionella pneumophila antigens in urine specimens from patients with symptoms of pneumonia. |
Additional Information/Important Notes
Interpretive Data
S. pneumoniae:
Positive:
Presumptive positive for Streptococcus pneumoniae antigen in urine, suggesting current or past infection. Culture is recommended to confirm infection.
Negative:
Presumptive negative for S. pneumoniae antigen in urine, suggesting no recent or current infection.
A negative result does not exclude an S. pneumoniae infection. The result of this test as well as culture, serology, or other antigen detection methods should be used in conjunction with clinical findings to make an accurate diagnosis.
L. pneumophilia:
Positive
Presumptive positive for Legionella pneumophila serogroup 1 antigen in urine, suggesting current or past infection. Culture is recommended to confirm infection.
Negative
Presumptive negative for L pneumophila serogroup 1 antigen in urine, suggesting no recent or current infection. Infection with Legionella cannot be ruled out because:
Other serogroups (other than serogroup 1 which is detected by this assay) and other Legionella species (other than L pneumophila) can cause disease
Antigen may not be present in urine in early infection
The level of antigen may be below the detection limit of the test
Legionella culture is recommended for cases of suspected legionella pneumonia due to organisms other than L pneumophila serogroup 1.
Limitations
Excretion of Legionella antigen in urine may vary depending upon the individual patient. Antigen excretion may begin as early as 3 days after the onset of symptoms and persist for up to 1 year afterwards. A positive Rapid Legionella result can occur due to current or past infection and therefore is not definitive for infection without other supporting evidence.
CPT Codes
87899x2