What term describes a localized swelling filled with pus in rabbits?

The term that describes a localized swelling filled with pus in rabbits is an abscess. An abscess occurs when bacteria infect a tissue, leading to the accumulation of pus—a thick fluid consisting of white blood cells, dead tissue, and bacteria. This condition is typically caused by an injury or infection that compromises the skin or other tissues, allowing pathogens to enter and engender an inflammatory response, resulting in the formation of an abscess.

Abscesses can be identified as swollen, painful areas that may feel warm to the touch. Proper veterinary care is crucial for treatment, which may involve draining the abscess and addressing any underlying infection with antibiotics.

Understanding this term helps in recognizing symptoms of infections and the necessity of appropriate medical treatment in rabbits. The other choices—cyst, fistula, and lesion—refer to different conditions. A cyst is a closed sac that generally contains fluid or semi-solid material but is not always associated with infection. A fistula is an abnormal connection between two body parts, while a lesion can refer to any abnormal tissue change, not specifically characterized by the presence of pus.