When a patient has a complex or chronic infection, care planning often requires convenient, easy specimen collection, comprehensive testing, and extensive support. With flexible tests and screens for a wide range of diseases, Quest Diagnostics provides you the actionable insights that help you provide the best care possible.
From hepatitis and tuberculosis (TB) to human immunodeficiency virus (HIV), tick-borne disease, and other infections, our testing menu is both diverse and innovative, accounting for resistant organisms and newly emerging strains of some of the most dangerous pathogens. You can also count on our suite of integrated services—including patient reminders and appointment scheduling—to optimize compliance during monitoring, treatment, and follow-up.
The pandemic exposed the challenges and opportunities in enabling faster and more effective diagnostics for infectious diseases. While vaccines have helped to significantly mitigate the transmission of COVID-19, new variants have proven to be particularly problematic among unvaccinated individuals and high-risk communities.
As these and other barriers take shape during the return to work, school, life, and healthcare, the need for comprehensive, flexible, and adaptive testing programs is evident. While COVID-19 has taken priority, the lessons learned from the pandemic also bring new insights for prevention, diagnosis, and management of future epidemics.
Make more informed, confident diagnostic and treatment decisions relying on our extensive infectious disease test menu. Our quantitative and qualitative assays help physicians not only screen for and identify pathogens, but help in assessing treatment response and drug resistance, and in planning appropriate care.
With the COVID-19 public health emergency (PHE) ending, there are important coverage changes to SARS-CoV-2 (COVID-19) testing for you and your patients.
Infectious Diseases
Learn more about Quest’s expanded testing options for influenza.
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Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.
