The route of swine influenza virus in the body

The swine influenza virus, like all influenza viruses enters the body through the upper airways from where it joins the cells it infects, and which it uses to multiply.

•     There are three types of influenza viruses, types A, B and C, C-type virus can cause only light respiratory problems.
  
      Viruses A and B contain two types of surface proteins: hemagglutinin and neuraminidase, in the form of spicules that bristle its envelope. The H1N1 virus (hemagglutinin type 1 and neuraminidase type 1) at the origin of the ‘Mexican influenza epidemic’ is part of Type A, divided into many subtypes and variants in subtypes.
  
      Viruses type A and B consists of 8 segments of RNA (ribonucleic acid, their genetic material) that are mixed as the cards we mix up, according to the virologist Sylvie van der Werf. They can undergo major changes and radically mutate.
  
      In addition, pork is receptive to different forms of viruses, which can recombine and cause the creation of multiple viruses. This is the case of H1N1 current mixing two pig’s strains, an avian strain and a human strain and is transmissible to humans.
  
      Worse: the virus uses men as a vector of the disease, which then transmits from human to human.
  
      When it infects humans, the influenza virus attaches the cells and through the respiratory epithelium, a sort of protective layer on the surface of cells.
  
      To multiply, it reprograms the cell and diverts its activity to its benefit. Each infected cell can produce hundreds of viruses, which invade the entire respiratory system.
  
       The incubation period of swine influenza is 3 to 7 days or more in young children. The symptoms are similar to those of other flu: high fever, aches, chills, cough etc...
  
      The virus is highly contagious, transmitted through water droplets expelled when you breathe, you cough or sneeze on. To stop an epidemic, scientists recommend isolating the person and administering anti-viral.
  
      There is no certainty about the body's response to this new virus. For the British virologist John Oxford (London), “if we have not seen this virus, we have been exposed to other family members H1N1 since 1978. There would be a level of immune memory against the agent among humans, unlike the avian H5N1 virus completely new to the organization, according to this specialist.
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• Ennaharonline/ M. O.