Which parasite was not observed on examination?

• A. Mites
• B. Fleas
• C. Ticks
• D. Lice

Answer: (A)

The key idea is that some parasites are easy to spot during a routine exam, while others are not and require special testing. Fleas, ticks, and lice are macroscopic; you can usually see them on the coat or skin or feel their presence when palpating. Mites, on the other hand, are typically microscopic and live in follicles or under the skin, so they often aren’t seen without targeted sampling such as skin scrapings or tape preparations examined under a microscope. Because mites are not readily observable on a casual examination, they are the ones not observed, whereas the other parasites would usually be detected if present.