Webquest 3

Source:  Webquest 3    Tag:  equine influenza virus
A) Common pathologies of horses

Tetanus: Is caused by a bacterial toxin normally found in the soil and in the feces of horses. The bacteria that produce the tetanus toxin need a decreased oxygen supply to multiply, so any area where there is a deep puncture wound or where a wound has healed over is an area where tetanus can thrive. Symptoms of tetanus include a protrusion of the third eyelid and stiff neck, progressing to overall muscle stiffness causing a 'sawhorse' stance. Tetanus is often fatal, but a yearly vaccine can prevent it, and the vaccine is a good idea because small cuts can go unnoticed and become infected.
Equine Influenza: This viral disease is spread by inhalation of drops of infective material. Signs include a dry, hacking cough, sudden onset of fever, watery nasal discharge, weakness, loss of appetite and depression. Infection with equine influenza is rarely fatal but can cause problems such as emphysema, pneumonia or bronchitis.
Equine Herpes Virus: There are 2 types of equine herpesvirus: EHV-1, which causes respiratory disease (fever, cough, nasal discharge), reproductive problems (abortion, stillbirth), and neurological problems (hindlimb weakness, difficulty walking, sometimes paralysis); and EHV-4, which is usually limited to respiratory problems. Once a horse has been infected with EHV-1 or EHV-4, he will always be a carrier, and may shed the virus during times of stress.
  Rabies : This is a viral infection of the central nervous system, and although it is not common in horses, rabies can be transmitted to horses by the bite of an infected animal such as a skunk, raccoon, fox, dog or bat. Rabies can be transmitted to people. We recommend that you check with your veterinarian regarding recommendations for rabies vaccination for your horse.
Strangles
: This contagious respiratory disease is caused by a bacterial infection. Signs include a fever, thick, yellow, nasal discharge and swollen, abscessed lymph nodes under the jaws. The infection is spread by infected material from nasal discharge or abscesses contaminating stalls, feed troughs, pastures, etc. Young horses are the most susceptible to strangles.

Skeletal system of Horse






B) 

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2) External anatomy of sheep