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What Is Mad Cow Disease?
Mad cow disease, which also is called bovine spongiform encephalopathy or BSE, causes damage to the cow's brain. Signs that the cow is sick include trouble walking. Eventually the sick cow's legs can't hold it up and it stumbles and falls. Sick animals also may act very nervous or violent.
Scientists aren't exactly sure how cows get this disease, but it probably happens when cows eat feed made from cows infected with mad cow disease.

Can People Get Mad Cow Disease?
As of November 2005, 184 people worldwide are known to have become sick with the human kind of mad cow disease called variant Creutzfeldt-Jakob disease (vCJD). It is believed that those people got vCJD from eating beef products that came from cows infected with mad cow disease.
Both vCJD and mad cow disease are not contagious. This means that you (or a cow) can't catch it from someone else the way you can catch a cold. Also, research seems to show that you can't get mad cow disease from milk, even if the milk comes from a sick cow.
Cats are the only pets that are known to have a version of mad cow disease. It's called feline spongiform encephalopathy. The same things that are being done to protect people and cows are also protecting cats from getting the disease.
Question 1
Which body part of a cow does the Mad Cow Disease affect?
A. lungsB. skin
C. heartD. brain
Question 2
Which of the following is a symptom of Mad Cow Disease in cows?
A. trouble breathingB. trouble walking
C. trouble seeing objectsD. color of the milk changes
Question 3
Which fact is correct?
A. A cow can get Mad Cow Disease by touching another infected cow.B. Human can get Mad Cow Disease by drinking milk that came from cows infected with Mad Cow Disease.
C. Mad Cow Disease is not contagious.D. Mad Cow Disease causes damage to the cow's kidneys.
Question 4
A version of Mad Cow Disease in cats is called _____________________________________.
A. feline spongiform encephalopathyB. bovine spongiform encephalopathy
C. avian spongiform encephalopathyD. variant Creutzfeldt-Jakob disease
Question 5
How do human get infected with Mad Cow Disease?
A. by drinking milk from cows that had BSEB. by eating beef products from cows that had BSE
C. by touching cows that had BSED. through air
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The following text/image is for 6 through 10
Newcastle Disease
Newcastle disease (ND) is a contagious and fatal viral disease affecting all species of birds. ND can occur as three distinct types, based on the ability of the virus to cause disease. These types are lentogenic, mesogenic and velogenic. Velogenic Newcastle Disease (VND) is one of the most infectious diseases of poulty on the world, with death rates of 100 per cent in unvaccinated flocks. Vaccinated flocks can also experience infections and deaths.

VND does not pose a serious threat to human health - it does not seriously affect the safety of consuming poultry and egg products. There have been cases where VND has caused conjunctivitis (pink eye) in people exposed to high levels of the virus, such as lab workers and people in regular contact with very sick birds or contaminated poultry material. The major concern of VND outbreaks is the potential impact on poultry operations.
Signs of VND
It affects the respiratory, nervous and digestive systems of birds. The incubation period ranges from two to 15 days. An infected bird may exhibit the following signs:
  • Respiratory: sneezing, gasping for air, nasal discharge, coughing;

  • Digestive: greenish, watery diarrhea;

  • Nervous: depression, muscular tremors, drooping wings, twisting of head and neck, circling, complete paralysis;
  • Partial to complete drop in egg production;
  • Production of thin-shelled eggs;
  • Sudden death;
  • Increased death loss in a flock.
  • Question 6
    The Newcastle disease affects all species of _______________.
    A. cattleB. swine
    C. humanD. birds
    Question 7
    Which type of Newcastle disease is most infectious disease of poulty?
    A. LentogenicB. Mesogenic
    C. VelogenicD. Mentogenic
    Question 8
    The incubation period of the Newcastle Disease ranges from ___________________.
    A. two to 7 daysB. two to 15 days
    C. two to 15 weeksD. two to 7 weeks
    Question 9
    Which fact is CORRECT?
    A. Newcastle disease is a contagious disease.B. Velogenic Newcastle Disease poses a serious threat to human health.
    C. Newcastle disease is not a contagious disease.D. Mesogenic Newcastle Disease is one of the most infectious diseases of poultry in the world.
    Question 10
    How can you tell that Newcastle disease have affected the digestive system of a hen?
    A. the hen will produce green colored eggsB. the feathers will change color from white to green
    C. the hen will gain weightD. the hen will have a greenish, watery diarrhea
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