The National Animal Health Laboratory Network (NAHLN) is:

• A. Is a network of laboratories that support NVSL during an outbreak by testing suspect herds and conducting surveillance testing
• B. Is the software used by the NVSL laboratories for reporting test results to ADDs and SAHOs
• C. Is a network of laboratories where each specializes in testing for one or two diseases
• D. Is the OIE network of all approved testing laboratories in OIE member countries

Answer: (A)

NAHLN is a network of laboratories that support NVSL during an outbreak by testing suspect herds and conducting surveillance testing. It brings together federal, state, university, and select private labs to expand diagnostic capacity, standardize testing methods, and rapidly share results and data to coordinate outbreak response and ongoing disease surveillance. This setup is about how many labs work together to handle testing needs, not about a single software tool, and not limited to one or two diseases per lab. It’s also a U.S.-focused network under USDA, not the international OIE system of approved laboratories.