VIRUSES

• • Viruses cannot be killed by antibiotics
• Measles - a highly infectious disease

  • Symptoms: fever, red skin rash
  • Measles spread in droplets when an infected person coughs or sneezes, passed to different person when droplets are inhaled
  • Can cause damage to breathing system and brain, can be fatal
• HIV (human immunodeficiency virus)

  • Symptoms: flu-like illness (virus is attacking cells of patients immune system)
  • Patients immune system can become so badly damaged that it cant fight other infections that others could easily deal with - patient can now easily contract other infections such as TB
  • Can be spread through sexual contact or exchange of body fluids which occurs when drug users share needles
• TMV (tobacco mosaic virus)

  • Symptoms: mosaic pattern, dicolouration in leaves
  • Transmitted through contact between plants naturally or on hands of the farmer
• • Viruses attack by reproducing inside of the body cells