Immunity

Question 1

Difference between active and passive immunity

Answer 1

Active: individuals immune system recognizes antigen, produces antibodies
Passive: conferred on an animal without any effort on its part

Question 2

natural way to confer active immunity

Answer 2

Animal contracts disease (produces antibodies)

Question 3

Artificial way to confer active immunity

Answer 3

Vaccination

Question 4

Natural way of conferring passive immunity

Answer 4

When young drink colostrum (full of maternal antibodies)

Question 5

Artificial way of conferring passive immunity

Answer 5

Antitoxins or antiserums

Question 6

What is an antiserum

Answer 6

Preparation of antibodies

Question 7

What animals is colostrum most important for

Answer 7

Herbivores (carnivores and primates receive some Ab in the uterus)

Question 8

____ % of neonates weight should be fed of colostrum in the first 24 hrs of life

Answer 8

10%

Question 9

1/4-1/2 of the colostrum should be drank within the first _____ hours of life

Answer 9

6

Question 10

Which gives quicker protection, passive or active immunity

Answer 10

Passive

Question 11

Which lasts longer, active or passive immunity

Answer 11

Active, Bc memory T cells develop

Question 12

After vaccination, Ab production peaks about how long after

Answer 12

2 weeks

Question 13

How to measure immunity

Answer 13

Titer- measures amount of antibodies in patients serum

Question 14

What measuring the amount of Ab in a serum (titer) can tell you

Answer 14

Confirm presence of disease, determine immune status, judge effectiveness of vaccine

Question 15

How a titer is done

Answer 15

Keep diluting sample, the last dilution w antibodies still present is the titer

Question 16

The higher the titer the ______ antibodies present

Answer 16

More

Question 17

How titer is used to determine disease

Answer 17

One sample is taken at onset of disease, 2nd is taken ab 2 weeks later. Compare the 2 titers

Question 18

An increase in anitbody levels means the animal

A 4 fold rise in titer indicates

Answer 18

Has an infection

4 fold indicates presence of disease

Question 19

The acute and convalescent sample refer to

Answer 19

Acute- 1st titer taken at onset of disease

Convalescent- 2nd ab 2 weeks later

Question 20

A fluorescent antibody Test is used to detect

Answer 20

Rabies

Question 21

How immune response is measured

Answer 21

Use antigen:antibody binding to test for disease