What are the signs of animals infected with brucellosis?
A. In the field, elk and bison usually do not show any obvious signs of having brucellosis. After an animal becomes infected with the bacteria, the incubation time (the time between exposure to the bacteria and the beginning of symptoms) varies depending on how much exposure the animal had, whether or not they have been previously vaccinated, the species, age, sex and stage of pregnancy. Following a short infection, the bacteria usually collects in the udder and/or lymphatic system and, depending on the stage of pregnancy, in reproductive tissues. Abortion is a symptom of brucellosis. Other symptoms include retained placenta, reduced milk production, weak calves, lameness, swollen joints, swollen testicles and reduced ability of females to become pregnant.
