Poultry diseases: Flashcards

1
Q

Origin of Fowl Cholera

A

Virulence of P.multocidia (carrier ) + predisposing factors

  • Clinical signs within 24.hours= can be originated back before delivery
  • After 24.hours= was there any outbreak at seller, during previous years?
  • Has/ Did he informed the buyer about outbreaks
  • Other sources of infection at the buyer= isolation , all-inn all out
  • Predisposing factors= transport, force feeding
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2
Q

Significance of Fowl Cholera

A

1) Depending on death rates
2) Spread via egg-shell
3) NO GERMINATIVE infection

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3
Q

Origin of Avian leucosis

A
  • Clinical signs only in case of infection before 10.weeks old
  • if animals are above >10.weeks= orginated back to before delivery
  • if animals are below <10.weeks= germinative or contact infection= epidemic investigation
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4
Q

Significance of Avian leucosis

A

1) Sporadic deaths
2) Breeding flocks= germinative infection
3) Always significant
4) Immunotolerence= life long shedders
5) Table egg prod

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5
Q

Origin of Mareks

A
  • Age of susceptibility= 10.weeks
  • Route of infection= Egg-shell, day olds, adult, person, equipments
  • Incubation period 1-7.months
  • The younger that chicks, higher susceptibility
  • High rate of diseased animals= infection during the first days of live
  • Infection at hatchery= isolated until 6-8.weeks old
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6
Q

Significance of Mareks

A

1) Depending on death rates (2%)

2) NO GERMINATIVE INFECTION

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7
Q

Diagnosis of Mareks

A
  • Acute
  • Chronic
  • Clinical signs
  • Patho / Histopath
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8
Q

Origin of Fowl typhoid—-notifiable

A
  • Death during the first 5.days= originated back to hatchery
  • Breeding flocks= if hatchery complied the rules (markings, separations etc)
  • Test= blood + examination of dead eggs
  • Death after 5.days=epidemic investigation
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9
Q

Significance of Fowl typhoid

A

1) Infection= breeding flocks should be free from Salmonella
2) Disease= broiler chicks (2% death rate)
3) Breeding flocks= GERMINATIVE, 1 case is significant enough

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10
Q

Orgin of Derzsy –Geese parvi

A
  • High death rate= GERMINATIVE infection or infection at hatchery
  • Incubation period= 8-12days
  • Give serum first day of hatchery
  • Isolation of day-old gooslings
  • Vaccination of breeding flocks
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11
Q

Significance of Derszy

A

1) Breeding flocks= Germinative

2) Broiler= if loss is above 2%

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12
Q

Origin of Mushy chicken disease

A

-Death of day-old chickens, under the age of 10.days old can be originated back to hatchery

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13
Q

Significance of Mushy chicken disease

A

-Depends on the death rate losses

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14
Q

Diagnosis of Mushy chicken disease

A
  • Clinical signs= weak, low body weight
  • Pathology
  • Mortality= 1-10 days old
  • Lab examination
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15
Q

Fertility of EGG

A

In the hatching eggs there ar viable embryo

  • Sex rate
  • Age
  • Temp
  • Lenght + intensity og lighting
  • Infectious/ non infectious diseases
  • Feed toxicosis
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16
Q

Hatchability of EGG

A
  • Age
  • Contamination
  • Temp
  • Humidity
  • Rest after transport
  • Vitamins to breeding flock
  • Hatching technology