Leptospirosis, caused by spiral Leptospira bacteria, affects cattle, dogs, pigs, sheep, goats, and humans. Ponds, lakes, and other bodies of water are common sources of leptospirosis, and rodents may carry the infection. This infection causes kidney disease and destruction of red blood cells with potential anemia; it may also cause abortion. Brucellosis also causes abortion, as well as swelling of the reproductive organs in males. Caused by the Brucella bacterium, it occurs primarily in cattle, pigs, sheep, dogs, and goats, and may be transmitted to humans.
