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Which infectious agent is the most resistant to sterilization?

bacteria

virus

fungi

prion

The smaller the agent, the more difficult it is to destroy it. Prions are quite resistant to proteases, heat, radiation, and formalin treatments. 134°C (274°F) for 18 minutes in a pressurized steam autoclave may not be enough to deactivate the agent of disease. Prions may last for decades in the environment.

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Germany

4%

11%

6%

76%

143

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4%

23%

1%

68%

63

Pakistan

13%

13%

7%

65%

134

Italy

18%

14%

3%

62%

27

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10%

18%

10%

60%

38

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9%

20%

10%

59%

20508

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10%

17%

14%

57%

28

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7%

18%

14%

53%

76

Unknown

14%

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16%

50%

50

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15%

13%

20%

50%

44

the United Kingdom

15%

25%

10%

47%

367

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14%

26%

10%

47%

95

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11%

27%

13%

44%

1022

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17%

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11%

44%

34

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24%

28%

4%

44%

25

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15%

27%

9%

42%

33

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18%

28%

10%

40%

921

Ghana

13%

47%

0%

34%

38

the Philippines

26%

23%

18%

29%

117

Nigeria

11%

41%

16%

28%

81

How do baby birds get oxygen inside their eggs?

They have a large oxygen supply from the start

Oxygen is created during protein reduction

Oxygen comes in through pores in the shell

They don't need oxygen at all

Which dogs are known to eat fish?

Irish Water Spaniel

Portuguese Water Dog

Okavango river is famous for its biologically rich delta. What is the river's outlet?

It doesn't have an outlet to the sea

The Boyd Massacre occurred in 1809, when natives killed and ate between 66 and 70 crew members of the ship Boyd. Where did it happen?

in the Caribbean