Multiplex PCR can be used on which sample types?

• A. Blood, sputum, meninges, GI
• B. Urine only
• C. Blood only
• D. Sputum only

Answer: (A)

Multiplex PCR shines because it can detect multiple targets in one reaction, and it’s applicable to a wide range of clinical specimens. Pathogens can be present in blood, sputum, CSF (from meninges), and stool (GI tract), and with proper extraction and inhibitor management, each of these matrices can yield reliable multiplex results. That breadth—to test several body sites in one panel or across different panels—illustrates why a broad list of sample types is the best reflection of how multiplex PCR is used in practice. While urine is also tested in some multiplex setups, the key idea is that multiplex PCR isn’t restricted to a single specimen type; it works across multiple sample types with appropriate methods and validated panels.