Principles of disease control Flashcards
Biosecurity of poultry
Prevent disease entering
Potential to eradicate
Good biosecurity is not only applicable to disease control that affects the bird e.g. Newcastle disease or Mycoplasma
Also applicable to the control of zoonotic disease e.g. Salmonella
Vaccination often though to be the reason for successful reduction in salmonella incidents in chickens
Vaccine not introduced into the UK until 1994
Biosecurity also a key factor in the reduction of incidences
Bio-secure farm set up
§ Isolate from other poultry
□ Commercial
□ Backyard
§ Defined sites
§ Well maintained bird proof housing
§ Vermin control
Farm management of biosecurity
§ Farmers must not have contact with other poultry
□ Other commercial
□ Backyard poultry at home
§ All in all out systems
□ Cleaning and disinfection between the flocks
Hygiene in poultry farms
Prevent disease carryover
Eradication
Manure removal
Blowing down dust
Sweeping houses
Litter removal
Washing, foam cleaning
All on farm equipment should be cleaned and disinfected
Clean check post disinfection
Better cleaning
§ High pressure flushing
§ Ultrasonic
Hygiene checks on drinker lines
Characteristics of detergent
§ Wettening: decrease surface tension
§ Dispersing: split up dirt particles
§ Emulsifying: float oil and fat
§ Suspending: float dirt particles
§ Carrying: of dirt to the sewage
§ Sequestering: dissolve salts
Vaccination program of poultry
Program needs to consider
§ Bird type (broiler or layer)
§ Site history
§ Local disease situation
§ National disease situation
Tailored to the site
Standard broiler vaccination program
§ Will include
□ IBV vaccination at day old in the hatchery
□ IBV booster at 10-12 days on farm
□ IBD vaccination at about 18 days
Chick vaccination
What does a standard layer vaccination program
Mareks at the hatchery
IB/ND (usually two primers)
IBD (2/3 primers)
AE (single)
Salmonella (lion code)
ND, IB, and EDS
Common additions
□ Paracox (free range)
□ IB variant 793/B (+others)
□ ART
□ ILT
□ Pasteurella/Erysipelas
