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23 spring: poultry > Test 1: lecture 2 > Flashcards

Test 1: lecture 2 Flashcards

1
Q

4 common respiratory diseases of poultry

A

Infectious Laryngotracheitis
Avian Pox
Infectious Bronchitis

Mycoplasma gallisepticum (bacteria like organism)

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2
Q

infectious laryngeotracheitis is caused by

A

Gallid herpesvirus type 1 (GaHV-1)

carrier state in the trachea and trigeminal ganglia

attacks chicken, pheasant and peacocks

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3
Q

symptoms of infectious laryngotracheitis

A

decrease in egg production
(no shell quality issues)
high mortality

mild:
mild respiratory disease
conjunctivitis
mucus in trachea

severe:
caseous material or hemorrhage in trachea
peeling of lining of epithelium

intranuclear inclusions

occurs in 3 weeks or older birds

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4
Q

peeling of epithelium and caseous material and hemorrhage in the trachea with no shell quality issues in birds older then 3 weeks old

A

infectious laryngotracheitis

herpes virus

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5
Q

what disease

A

INFECTIOUS LARYNGOTRACHEITIS

caused by herpes virus

causes caseous material, hemorrhage and peeling of epithelial layer of trachea
causes respiratory disease, conjunctivitis

older then 3 weeks old

intranuclear inclusion

decreased egg production

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6
Q

what respiratory disease has intranuclear inclusions

A

infectious laryngotracheitis

herpes virus

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7
Q

transmission of infectious laryngotracheitis

A

poor biosecurity
can flare up with stress

no treatment caused by herpes virus

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8
Q

prevention of infectious laryngotracheitis

A

vaccination of long lived birds (breeders and layers)

maternal antibodies not protective

vectored not as effective as killed or live vaccine

CEO: eyedrop, spray or water; can revert
to virulence and spread; carrier state

TCO: eyedrop, “no spread”; carrier state; low potential to revert to virulence

Recombinant pox vectored or HVT vectored (Marek’s vaccine): injection or in ovo – does not cause a carrier state; no increase in pathogenicity; no transmission between birds

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9
Q

types of vaccines for infectious laryngotracheitis

A

vaccines grown in chicken embryo origin (CEO) and Tissue Culture Origin (TCO)

engineered vaccines: pox vector (does not work as well)

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10
Q
A

dry pox

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11
Q

types of poxvirus infect —

A

different species

Turkey pox / turkeys
* Fowl pox / chickens
* Quail pox / quail
* Pigeon pox / pigeons

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12
Q

two forms of avian pox

A

Diphtheritic (wet pox) – trachea/esophagus

Cutaneous (dry pox)

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13
Q

histopath of avian pox

A

Intracytoplasmic
eosinophilic inclusion bodies

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14
Q

what respiratory disease has Intracytoplasmic eosinophilic inclusion bodies

A

avian pox

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15
Q

transmission of avian pox

A

horizontal

Laceration/injury of the skin

Biting insects: e.g., mosquitoes

Mechanical transmission: Artificial
Insemination in turkeys

Contaminated environment - scabs

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16
Q

control of avian pox

A

live vaccincation

wingweb application in chickens

thigh application for turkeys

fowl + pigeon pox for varient strains

17
Q

signs of infectious bronchitis

A

Respiratory – Dyspnea, nasal exudate

Renal – High mortality, watery diarrhea/ diuresis, depression

Reproductive – Loss of egg production, wrinkled shelled eggs

caused by gamma coronavirus

18
Q

lesions caused by infectious bronchitis

A

Respiratory – Mucoid tracheitis

Renal - Swollen kidneys, excessive urates

Reproductive – decreased ova development (wrinkled shelled eggs)

caused by coronavirus

19
Q

what respiratory disease

A

infectious bronchitis

1st exposure leads to foamy

can then get 2ndary bacterial infection→ caseous material around heart and liver

20
Q

what happens to egg during infectious bronchitis

A

pale wrinkled eggs

white very “watery”

21
Q

what caused this

A

infectious bronchitis

attacks the kidneys and causes urate formation

22
Q

how to cause false layer syndrome

A

bronchitis that infects very young birds and causes damage to ovoduct

23
Q

transmission of infectious bronchitis

A

NOT vertical

aerosol, shed from cecal tonsils in
carrier birds for months

24
Q

treatment for infectious bronchitis

A

none- coronavirus

can try to prevent secondary bacterial infections

25
Q

vaccination for infectious bronchitis

A

type of corona virus- mutates frequently

will vaccinate layers and breeders with live and killed vacines

broilers: will do hatchery vaccination

26
Q

what are some common vaccine reactions—

A

reaction to live vaccines

foamy air sacs
caseous plugs in the trachea

27
Q

— is a bacterial like organism with no cell wall

A

mycoplasma gallisepticum

28
Q

which respiratory disease is spead by vertical transmission

A

mycoplasma gallisepticum

29
Q

what to do with broilers that are infected with mycoplasma gallisepticum

A

depopulate

30
Q

what to do with turkeys that are infected with mycoplasma gallisepticum

A

depopulate

31
Q

what to do with layer breeder that are infected with mycoplasma gallisepticum

A

depopulate

32
Q

what to do with pullets that are infected with mycoplasma gallisepticum

A

vaccinate before travel to layer farm that has history of + mycoplasma

33
Q

grossly what will mycoplasma gallisepticum look like

A

caseous material in air sacs, and trachea

34
Q

what happens to turkeys with mycoplasma

A

infectious sinusitis

infraorbital sinus filled with mucous

35
Q

treatment for mycoplasma

A

depopulation

medications- still carriers

vaccinations: live vaccine more effective then killed

36
Q

3 live vaccines for mycoplasma

A

Live vaccines:
F strain
6/85
Ts-11

killed- not used, not as effective

37
Q

spread of mycoplasma

A

wild birds (finches)

vertical transmission
horizontal transmission
poor bio security

23 spring: poultry (7 decks)

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