Jo Marie Edmister, Langley Veterinarian Clinic animal health care assistant, uses a microscope to inspect a K-9 lab sampleduring a routine check-up at Joint Base Langley-Eustis, Va., Jan. 5, 2017. Microscopic exams are used to detect and prevent of worms and certain bacteria that pets may be susceptible to based on their breed, age, and local environment. (U.S. Air Force photo by Staff Sgt. Teresa J. Cleveland)