What is the correct interpretation of "AU" in veterinary medicine?

In veterinary medicine, "AU" stands for "auris utra," which is the Latin term meaning "both ears." This abbreviation is commonly used when administering medications or treatments that are intended for both ears of an animal, ensuring that the veterinary staff understands that the instructions pertain to a bilateral application.

Understanding these abbreviations is crucial in a clinical setting, as accurate communication regarding treatment sites is fundamental to the proper care of the animal. For instance, if only one ear needs treatment, it would be indicated differently, often using terms that specifically reference the right ear (AD) or left ear (AS). The clarity provided by using "AU" helps prevent any misinterpretation in administering medication or procedures.

In this context, the other choices refer to different anatomical sites or methods. “Right ear” and “left ear” are specific to their respective sides, while "subcutaneous" refers to a method of injection. Therefore, knowing that "AU" encompasses both ears aids in ensuring correct treatment and avoids any potential errors in veterinary practice.