Brucella is the causative organism of Brucellosis, an infection primarily caught from unpasteurised milk and cheese. Infection can sometimes spread from person to person, but this is mostly amongst breastfeeding mothers to their babies. Brucellosis is considered a significant health risk in parts of the world that do not engage in effective animal disease control programs. Symptoms begin very similar to that of flu, but can lead to disability or long-lasting symptoms such as Chronic Fatigue Syndrome. Brucellosis in pregnant women can cause miscarriage or birth defects.