Page 100 - (DK) Danger! Open with Extreme Caution!
P. 100

BIOHAZARD GALLERY


        Welcome to our Biohazard Gallery. Feel free to wander
        around and examine the world’s nastiest biological hazards—
        the bacteria and viruses that cause diseases. These are split
        into four levels, depending on how dangerous they are. On
        show today are levels 3 (to the left) and 4 (to the right). These
        are especially perilous, so it is important that you don your
        protective hazmat suit first.                                                    Yellow Fever
                                                                                         This is a clear view of the virus
                                                                                         (green) that causes yellow fever
                                                                                         in hotter parts of Africa and
                                                                                         South America. Spread by
                                                                                         bloodsucking mosquitoes,
                                                                                         yellow fever produces sweating
                                                                                         and nausea and, in serious
                                                                                         cases, liver damage and internal
                                                                                         bleeding. Fortunately, there is
                                                                                         a vaccine against the disease.

















        Tuberculosis
        The first exhibit shows the bacteria   Smallpox                                   West Nile virus
        that cause tuberculosis (TB)—once                                                 Take a look at a virus that’s
        a killer before the use of antibiotics.   Here is a rare chance to see a virus    on the move. Once confined
        These bacteria pass from person      (red) that has been eradicated               to Africa, the West Nile virus has
                                             throughout the world by the use
        to person when someone infected                                                   spread across the U.S. since
        sneezes, coughs, or spits. TB mostly   of vaccines. Samples of the virus          1999. It is passed on by
        affects the lungs, causing constant   are kept for research in a few              mosquitoes that bite infected
        coughing, sweating, weight loss,     laboratories. In earlier times,              birds and then bite people. Most
        and eventually death. Worringly,     smallpox was a devastating                   victims get a headache and
                                             and deadly disease that
        this disease is on the rise again.                                                a high temperature, but a few
                                             caused severe blistering                     suffer from inflammation of
                                             and scarring.                                   the brain, too.
                   LEVEL 3
                  HAZMAT SUITS
                  MUST BE WORN
                   AT ALL TIMES
















      100
                                           (c) 2011 Dorling Kindersley. All Rights Reserved.
   95   96   97   98   99   100   101   102   103   104   105