Dr. Porter- Avian Vacs (LS) Flashcards Preview

Exotics Master > Dr. Porter- Avian Vacs (LS) > Flashcards

Flashcards in Dr. Porter- Avian Vacs (LS) Deck (32):
1

What 2 condition are needed to create an infectious dz?

  1. susceptible host
  2. challenge organism (agent)

2

What are the 3 types of Vacs used in the poultry industry?

  • Killed
  • Live
  • Live-recombinant

3

What are the 6 possible Vax routes of admin?

  • Injection
  • In ovo
  • H2O
  • Spray
  • Wing web
  • Eye drops

4

What is the standard route for killed agent vaxs?

Injection

5

When used you NOT use an vaccine emulsion?

When it is "broken" → 3 layers w/ the bottom being dark brown or black

6

How do you test vax emulsions?

  • Shake vigoroulsy for 2 min
  • Let sit for 5 min
  • Observe for seperation

7

What % of birds get missed when using Killed Vaxs?

10-15% are NOT vaccinated

8

List the 4 Oil-emulsion Bacterins used in the Poultry industry.

(Killed vaxs→ more reactive vaxs)

  • Coryza
  • Cholera
  • Mycoplasma gallisepticum
  • Salmonella enteriditis

9

Advantages of Killed Vaxs?

  • Fewer systemic rxns
  • More direct hits
  • Doesn't spread to others
  • Long lasting, uniform immune response
  • Reduces risk of interference when using mulitiple Ags.

10

Who usually gets killed vaxs?

Breeders

11

Disadvantages of Killed Vaxs?

  • Increased labor costs → more handling required
  • Adjuvants
  • Contaminated needles
  • Can get exaggerated tissue rxns

12

Advantages of Live Vaxs?

  • Easy & fast to apply
  • Superior→ mucosal immunity
  • Longer shelf life
  • No skin/mm. rxns

13

Disadvantages of Live Vaxs?

  • Adverse rxns in the respiratory tract
  • Require rapid application
  • Limited microorganism t½
  • Shorter humoral immune response

14

What type is the Laryngeotracheitis vax?

Live-Recombinant Vaccine

15

Marek's dz is a _____ vax. When is it injected?

Live, in ovo vax

Day 1 @ hatchery

16

How is the Pox Vaccine given?

(TQ)

Wing Web Injection

17

What 4 things are vaccinated against using a Wing Web Vac?

  • Pox virus
  • Avian Encephalitis
  • P. multocida
  • Chick Anemia

18

When do outbreaks of Fowl Poxs occur in Poultry farms?

Most outbreaks are associated w/ inproper admin of Wing Web vaccines.

19

What is a Pox "take"?

  • Area of swlling 5-10 d after a wing web injection
  • + evidence that birds are responding to the vaccine

20

What % of birds should have "takes"?

99%

21

When should in ovo vaxs be given for optimal performance?

Vax innoculation must be done btwn 18-19 d of embryo incubation

22

What 5 dz's are vaccinated for using Eyedrop Vax?

  • Live NCD
  • Live Infectious Bronchitis
  • Infectious Bursal Dz. (IBD)
  • ILTHALLMARK ONE
  • TS-11 (MG)

23

How do you admin Drinking H2O Vaxs?

  • Clean H2O lines
  • "H2O starve" birds for ~ 2hrs
  • Fill lines b4 lights on/lines lowered
  • Use approved dye &  vax stabilizer
  • Flush lines full of vac
  • Should last for ~ 30 min
  • Run the feeders to increase drinking

24

4 things that cause a rapid loss of Drinking Water Vax t½.

  • Chlorine
  • Disinfectants
  • High H2O temp.
  • Organic matter

25

Advantages of Spray Vaxs?

  • Easiest to admin
  • Easy to prepare
  • Rapid, mass administration
  • Quick

26

Disadvantages of Spray Vaxs?

  • Excessive dust reduces spray effectiveness
  • Low humidity → evaporation of spray droplets
  • open-mouth breathing increases virulence

27

Micron size of Very Coarse Sprays?

Which dz is vaccinated for in this manner?

  • 200-300 microns
  • Coccidiosis

28

Micron size of Coarse Sprays?

On whom?

  • 80-100 microns
  • young birds

29

Micron size of Medium Sprays?

Use?

  • 50-70 microns
  • 2nd dary vaxs

30

Microns of Fine Sprays?

Use?

  • 20-40 microns
  • revaccinating older birds

31

Adverse Rxns after NCD/Bronchitis Vac?

  • Seen 3-5 d. post vax
  • "Heating up" → virus becomes less attenuated (& more pathogenic)  as it passes through the flock

32

If you don't maintain your spray vax equipement what can happen?

loss of uniformity of droplet size

inproper vaccination