CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
False colour scanning electron micrograph (SEM) of a colony of Brucella sp., a member of a genus of Gram negative, non-sporing, aerobic bacilli (rod- shaped bacteria), that are primarily pathogens of farm animals but also cause disease (recurrent fevers) in humans. B. abortus is effectively the sole causative agent of human disease in the UK, producing symptoms of fatigue, fever, anorexia, depression and muscle and joint pain. Contraction of human disease may occur through unpasteurised milk, but is more likely to be restricted to persons working in close contact with farm animals (veterinary surgeons, farm workers etc). Magnification: X 3,000 at 35mm size.
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