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Digestive: Viral Dss (part 1) Flashcards

1
Q

Viral diseases

A
  1. Inclusion body hepatitis
  2. Malabsorption syndrome
  3. Other viral enteritic infections
    a. Hemorrhagic enteritis
    b. Turkey Coronavirus Enteritis
    c. Rotavirus infection
  4. Viral infection of Waterfowl
    a. Duck hepatitis
    b. Duck virus enteritis
    c.Hemorrhagic nephritis and enteritis of.
    geese
  5. Goose parvovirus infection/Derzy’s disease
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2
Q

Inclusion body hepatitis etiologic agent

A

Avian adenovirus

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3
Q
A
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4
Q

Disease o young chickens
-hemorrhages
-pale bone marrow
- anemia
- depression

A

Inclusion body hepatitis

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5
Q

Sudden onset of mortality peaking in 3-4 days and continuing for 2-3 weeks

A

Inclusion body hepatitis

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6
Q

Inclusion body hepatitis incubation period

A

24-48 hours

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7
Q

Low morbidity,
MT reaches 25% over a 2 week period (course of disease)

A

Inclusion body hepatitis

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8
Q

Normally seen in meat producing birds at 3-7 weeks

A

Inclusion body hepatitis

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9
Q

Could occur in younger and older birds (breeder flock)

A

Inclusion body hepatitis

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10
Q

Inclusion body hepatitis transmission

A

Horizontal and vertical transmision

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11
Q

-Pale carcass, punctuate hemorrhages on breast muscles
-Swollen liver w/ subcapsular speckled hemorrhages and necrotic foci (punctuate not stellate)
-Anemia due to degeneration of bone marrow (pale on necropsy)

A

Inclusion body hepatitis

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12
Q

Inclusion body hepatitis diagnosis:

A

-Clinical signs and lesions
-Pathognomonic: demonstration of basophilic inclusion bodies of hepatocytes
-Isolated by inoculation in SPF (specified pathogen free) embryos or eggs with liver homogenates

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13
Q

Cowdry type A inclusion bodies in nucleus

A

Inclusion body hepatitis diagnosis: Pathognomonic

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14
Q

Inclusion body hepatitis tx and prevention

A

-Antibiotics to prevent bacterial infection
-Obtain stocks from IBD-vaccinated flocks
-Contaminated poultry house should be disinfected with compounds
-Vaccination

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15
Q

Tx: little value because self limiting (2weeks)

A

Inclusion body hepatitis

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16
Q

Inclusion body hepatitis:
Contaminated poultry houses should be disinfected with _________________

A

with iodine-containing compounds for NaOCl (sodium hypochloride)

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17
Q

Running/stunting syndrome

A

Malabsorption syndrome

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18
Q

Malabsorption syndrome etiologic agent

A

Avian Reovirus

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19
Q

Helicopter wing syndrome

A

Malabsorption syndrome

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20
Q

Infectious proventriculus

A

Malabsorption syndrome

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21
Q

Pale bird disease

A

Malabsorption syndrome

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22
Q

Brittle bone disease

A

Malabsorption syndrome

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23
Q

Seen in birds 6 weeks
also in chicks 7-14 days after hatching

A

Malabsorption syndrome

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24
Q

Malabsorption syndrome
Mortality
Morbidity

A

Mt: 2-10%
Mb: 5-50%

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25
Q

Poor FCR
Uneven growth rates
Reduced marketability of affected birds

A

Feed Efficiency and Rate of Gain Decreases in Malabsorption Syndrome

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26
Q

Malabsorption syndrome transmission

A

Horizontal and vertical transmission

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27
Q

Undigested feeds in feces

A

Malabsorption syndrome

28
Q

Seen in bilateral swelling of shanks and above the hocks: birds walk with stilted gaits

A

Malabsorption syndrome: Tenosynovitis in 4-8 weeks old

29
Q

Lesions:
GIT- atrophy if villi, proventriculus gizzard, enteritis
Arthritis- myocarditis, encephalimalacia, hepatitis, osteoporosis, pancreatitis

A

Malabsorption syndrome

30
Q

Malabsorption syndrome diagnosis

A

-Test: AGPT (agar gel precipitation test), virus neutralization test to detect specific serotypes
-Isolated: inoculate GIT homogenates from infected chicks into embryonated chicken eggs 5-7 days old

31
Q

Malabsorption syndrome prevention and control

A

-strict sanitation
-vaccinate day old chicks
-vaccinate breeder flocks to transmit passive immunity

32
Q

Etiologic agent for hemorrhagic enteritis

A

Type II Avian Adenovirus

33
Q

Causes marble disease in pheasants

A

Hemorrhagic enteritis

34
Q

Acute viral dss of turkeys 4 weeks and older

A

Hemorrhagic enteritis

35
Q

Hemorrhagic enteritis natural host

A

Turkeys, pheasants, chickens

36
Q

Financial losses+ immunosuppression and subsequent secondary bacterial infection

A

Hemorrhagic enteritis

37
Q

Rapid onset progression of clinical signs over 24 hrs period (acute onset)

A

Hemorrhagic enteritis

38
Q

Hemorrhagic enteritis transmission

A

Feco-oral route (horizontal)

39
Q

-Depression, melena, bloody droppings, death in 24 hrs of recovery
-Respiratory compromise: progressive dyspnea

A

Hemorrhagic enteritis

40
Q

Post mortem lesions: pale carcass in good condition

A

Hemorrhagic enteritis

41
Q

Pheasants: enlarged, mottled (marbled) spleen and edematous congested lungs

A

Hemorrhagic enteritis

42
Q

Friable spleen

A

Hemorrhagic enteritis

43
Q

Congested lungs, enlarged livers with petechial hemorrhages

A

Hemorrhagic enteritis

44
Q

Hemorrhagic enteritis diagnosis

A

-Isolation and ID (identification) of virus
-Serology: AGPT, ELISA

45
Q

Hemorrhagic enteritis differential diagnosis

A

-Reticuloenotheliosis of lymphoproliferative
-Bacterial septicemic diseases

46
Q

Tx for hemorrhagic enteritis

A

-Convamescent antiserum 0.5-1ml
-Antibiotics for secondary bacterial infection

47
Q

Control and prevention for hemorrhagic enteritis

A

-Good biosecurity
-Vaccination

48
Q

Bluecomb disease

A

Turkey coronavirus enteritis

49
Q

Mud fever
Transmissible enteritis
Coronaviral enteritis

A

Turkey coronavirus enteritis

50
Q

Etiologic agent for turkey coronavirus eneteritis

A

Group 3 Coronavirus

51
Q

Acute highly contagious dss of turkeys

A

Turkey coronavirus enetritis

52
Q

Incubation period of bluecomb dss

A

1-5 days (ave. 2-3 days)

53
Q

Shed in feces for several weeks after recovery from clinical disease

A

Bluecomb dss

54
Q

Sudden onset of clinical signs with high MB

A

Bluecomb dss

55
Q

Bluecomb dss transmission

A

Feco-oral route (horizontal)

56
Q

-decrease water consumption
-Watery diarrhea, dehydration, hypothermia, weight loss
- droppings: green to brown, watery, frothy with mucus and urates

A

Bluecomb dss

57
Q

Lx in intestine and bursa of fabricious

A

Bluecomb dss

58
Q

-Duodenum and ileum are pale and flaccid
-Ceca distended and filled with watery content

A

Bluecomb disease

59
Q

Bluecomb disease diagnosis

A

-virus isolation
-FAT, RT-PCR
-Serology

60
Q

Bluecomb disease: Tx and prevention

A

-antibiotics for secondary bacterial infection
-biosecurity measures
-thorough cleaning and disinfection
-Depopulation
-Downtime for min of 3-4 weeks

62
Q

Major dss of young ducklings

A

Duck hepatitis

63
Q

Etiologic agent for duck hepatitis

A

Duck hepatitis types 1,2,3

64
Q

Economic importance to all duck growing farms

A

Duck hepatitis

65
Q

Highly fatal, rapidly spreading viral infection

A

Duck hepatitis

Poultry Digestive (5 decks)

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