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Frequently Asked Questions

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Have questions about laboratory testing? We're here to help you understand your tests and what results might mean for you.
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Syphilis Tests

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A description of the syphilis test - what it is, when to take it, and how to interpret the results.
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Urine Drug Test

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Urine drug tests are the most common method of testing for the use of illegal drugs and the misuse of prescription and over-the-counter medicines.
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Influenza Tests

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The flu is a respiratory illness triggered by infection with an influenza virus. Our guide explains the types of flu tests and when and how they may be used.
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Trytase Test

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Severe allergic reactions are dangerous and come on fast. Measuring blood levels of tryptase helps diagnose allergic shock as well as some rare blood diseases.
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Opioid Testing

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Getting tested for opioid use? Opioid testing detects evidence of both illegal and prescription opioids. Learn more about opioid testing in our guide.
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West Nile Virus Test

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West Nile virus causes a viral infection and is transmitted to humans primarily by mosquitoes. Learn about when testing is used and interpreting test results.
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