What is the storage requirement of FebriDx®?
FebriDx® tests can be stored at room temperature (4-25°C or 39-77°F).
What patients should be tested with FebriDx®?
Patient with a new fever in the last 3 days
Patient with symptoms of a new ARI including: runny nose, nasal congestion, sore throat, new cough, hoarse voice, shortness of breath in the last 7 days
Patient that is 2 years or older
Patient not immunocompromised or taking chemotherapy, oral steroids, or interferon
Patient not taking antibiotics, antivirals, or had a recent live vaccine
Can FebriDx® be used on children?
Patients 2 years and older can be tested with FebriDx®.
What patient samples can be used on FebriDx® test?
Only fresh fingerstick blood can be used with the FebriDx® test. Venous whole blood cannot be used as MxA is an intracellular protein and once it is removed from the body, it loses stability.
When can the FebriDx® test results be interpreted?
FebriDx® test results can be read when 10 minutes have elapsed. FebriDx® test results are stable for up to one hour. Do not attempt to interpret results beyond one hour of test initiation.
The result line is faint. Does this affect the interpretation of results?
Even if the result line is faint in colour, incomplete over the width of the test strip, or uneven in colour, it should be interpreted as positive. A positive result indicates the presence of elevated MxA and/or CRP proteins.
The result line(s) is visible but the control line is absent. Can I still report the results?
A blue control line must appear in the result window for the test to be valid. The absence of the blue control line indicates an invalid result and the patient must be retested with a new FebriDx® test.
What is a clinically significant acute respiratory infection?
A “clinically significant” ARI is defined as the confirmation of a bacterial or viral pathogen in association with a host immune response. Unlike rapid antigen tests, PCR and culture, FebriDx® differentiates true infection from colonization/carriage through elevated levels of CRP/MxA.
Why do I sometimes see a CRP and an MxA line for some viral infections?
CRP is elevated in many viral infections including adenovirus and influenza. This is why CRP alone cannot differentiate between viral and bacterial infections. With FebriDx®, if the red line (MxA) is present then the result is a viral infection irrespective of CRP.
If you have further questions, please consult your FebriDx®
User Guide or contact us at info@FebriDx.com