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Patho poultry > poultry > Flashcards

poultry Flashcards

1
Q

Which of the following is true for Perosis?

A

The tendon of the gastrocnemius slips off

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2
Q

Osteomalacia is…?

A

None of the above (true def: defective bone mineralization)

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3
Q

Which of the following statements is true for Osteoporosis?

A

There is a severe rarefaction in the spongy structure of bone

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4
Q

What does amyelia mean?

A

Congenital lack of spinal cord

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5
Q

Which of the following is classified by osteoclast hyperfunction?

A

Osteodystrophia fibrosa

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6
Q

Perosis develops due to?

A

Mn deficiency

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7
Q

What is the cause of the ossification disorder observed in newborn piglets?

A

Congenital rickets

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8
Q

In whick of the following does optic nerve compression frequently occur?

A

Vit. A deficiency

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9
Q

During osteothesaurismosis…

A

There is no deformation in the tubular bones

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10
Q

Which of the following conditions is characteristic for the bones of an unused limb?

A

Osteoporosis

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11
Q

Which is true for osteodystrophia fibrosa?

A

In animals it is usually a secondary pathological process

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12
Q

What does poliomyelitis mean?

A

Inflammation of GM of spinal chord

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13
Q

Which of the following is a congenital bone development disorder?

A

Osteogenesis imperfecta

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14
Q

Ostodystrophia fibrosa frequently occurs in?

A

Facial bones / Ribs / Vertebrae / Long tubular bones

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15
Q

Which of the following changes can be observed in case of myositis chronica eosinophilica?

A

Eosinophil granulocyte inflammation of the masticatory muscles

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16
Q

Which of the following leads to osteopetrosis in birds?

A

Retrovirus

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17
Q

Which histopathological change is characteristic for infectious spongiform encephalopathy?

A

Formation of amyloid plaques due to neuronal degeneration

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18
Q

What age can hydrocephaly develop?

A

Any age

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19
Q

What does panostetitis stand for?

A

Simultaneous inflam of the bone and periosteum

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20
Q

In which of the following is there a decreased osteoid formation?

A

Calcium deficiency

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21
Q

Which endocrine organ has a major role in the ossification process?

A

Parathyroid

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22
Q

Which of the following changes is characteristic for Rickets?

A

All of them (uncalcificated cartilage and osteoid tissue in growing zone / CT in the
metaphysis / deformation of the bones)

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23
Q

Which of the following is correct in case of Koves disease?

A

It is caused by Cl. Septicum and affects the swine

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24
Q

Arthrosis can be defined as…

A

Regressive changes in the joint cartilage

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25
Q

Which virus cause proventriculitis lesion?

A

Caused by the virulent strain of infectious bursitis

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26
Q

What is the most common primary organ lesion for tuberculosis?

A

Intestines

Lungs ?

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27
Q

What causes hemorrhagic tracheitis?

A

Herpesviridae
Alphaherpesvirinae
Infections laryngotracheitis virus (ILTV)

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28
Q

When does the airchamber appear, when is it formed in the egg?

A

Day 5

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29
Q

Where is the egg-shell pigmented in the oviduct?

A

Uterus (vagina-gland in the transition. Protoporfirin)

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30
Q

How can you differenciate Coli granulosa from tuberculosis?

A

Stain the bacteria, ZN Coli granulosa

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31
Q

Who has crop milk?

A

Pigeon, dove

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32
Q

Mortality/morbidity in PEMS and PEC?

A

Up to 100% (turkey)

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33
Q

What happens to the yolk sac?(Through what opening is it absorbed?)

A

Normally absorbed the day before hatching via navel (20-21st day), then it is digested in
the first couple of weeks via ductus vitello intestinalis

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34
Q

Clostridium botulinum:

A

Toxins by ingestion. Botulism proliferates, produces toxins – goes to medulla and cause fatal motor paralysis

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35
Q

What does the intestines look like in malabsorption?

A

Greyish, dilated, undigested food appear, degeneration of villi

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36
Q

What type of hepatocytes?

(duck viral hepatitis, young)

A

Immature

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37
Q

What causes uricosis in day old chicks?

A

Vit. A deficiency and/or mycotoxins

– cause degeneration in the kidney during hatching

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38
Q

Pathological findings in Derzy’s disease?

A

Hydropericardium, rounded heart

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39
Q

What part of skeleton is affected by spondylosistenis (skeletal disease in turkey)?

A

6th thoracic vertebra. Deformity which causes spinal cord compression and paralysis

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40
Q

Thickness of epiphyseal cartilage in some bird spp?

A

1-3mm

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41
Q

What affected organ causes black head disease?

A

Turkey; liver – black spots (histomonas meleagridis)

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42
Q

Osteothesaurisomosis is?

A

Physiological accumulation of Ca in bone or eggshell

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43
Q

Derzy’s disease caused by?

A

Parvovirus

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44
Q

Differences btw duck and chicken babybird?

A

Duck has elongated beak, longer than chicken, duck has swimfeet

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45
Q

Cause of «mushy chick disease»?

A

Noninfections; inadequate nutrition in layer, bad egg handling, problems during
hatching.
Infectious: salmonella, e.coli etc.

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46
Q

Pathology of Mushy chick disease?

A

Decreased BW, inflamed yolk sac, omphalitis

( inf.of ductus vitelosus) , open navel

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47
Q

Pathogen of embryonic death in the first trimester?

A

Mycoplasma iowae

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48
Q

Clinical signs of Derzy’s disease?

A

Opisthotonus, loss of feathers around eyes, abnormal movement.

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49
Q

Where is the primary lesion of Runting stunting syndrome appear?

A

Intestines

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50
Q

Histomonosis appears mostly in which species?

A

Turkey

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51
Q

Where are the necrotic foci found in histomonosis?

A

Liver

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52
Q

Trichomonosis appears in?

A

young pigeons

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53
Q

Which bacteria does not cause gangrene?

A

P. Multocida

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54
Q

Bollinger bodies are seen in what disease?

A

Avian pox

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55
Q

Quail disease?

A

Ulcerative enteritis

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56
Q

What can cause proventriculitis?

A

All (pox, adeno, corona)

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57
Q

Vector of Borrelia?

A

Avian tick

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58
Q

Acute borreliosis in geese causes?

A

Diarrhea and emaciation

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59
Q

Chronic fowl cholera is caused by?

A

Less virulent strain of P. Multocida

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60
Q

Aracuna gives?

A

Green eggs

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61
Q

Campylobacter jejuni main feature?

A

Septicaemia

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62
Q

Ca deposit in long bones?

A

Osteothesaurisomosis

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63
Q

Who has spotted egg?

A

Turkey

alternatives were; chicken, duck, goose

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64
Q

What keeps the yolk in the centrum of egg?

A

Chalazae

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65
Q

When is fatty infiltration of the liver pathological in young birds?

A

from 3 weeks (20 days)

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66
Q

Causative agent of Arizonosis?

A

Salmonella

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67
Q

What is cellulitis?

A

Inflam.of subcutaneous CT

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68
Q

What does pseudomonas aeruginosa cause in the egg?

A

Mixed content

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69
Q

Picture: egg without eggshell/thin shell

A

decreased mineralization

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70
Q

Which strain causes death in ND?

A

Velogenic

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71
Q

Agent of coryza?

A

Avibacterium avium

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72
Q

The different name for hydropericardium ascites?

A

Increased pulmonary arterial pressure disease

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73
Q

Lesions in Derzys?

A

Serofibrinous fluid in cavities

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74
Q

Susceptible age in Derzys?

A

1-4 weeks

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75
Q

Susceptible age for duck for Rimerelliosis?

A

2-8 weeks

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76
Q

Species susceptible for Rimerelliosis?

A

Goose, duck

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77
Q

Species that can get infectious anaemia?

A

Chicken

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78
Q

Hemorrhagic syndrome caused by?

A

Alternaria toxins (tenuazonic acid)

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79
Q

What young birds can be detected by the color of their feet and beak?

A

Guinea fowl

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80
Q

Rupture of follicles (degradation of follicles) leads to?

A

Serositis

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81
Q

Young birds get mycosis by what route?

A

Inhalation

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82
Q

Infectious bronchitis starts where?

A

In lower third of trachea

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83
Q

Osteomyelosclrerosis is?

A

Another name for osteothesaurisomosis

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84
Q

Infectious laryngeal tracheitis causes?

A

No viraemia

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85
Q

Hemorrhagic tracheitis caused by?

A

ILT

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86
Q

Infectious corzya can infect chicken and?

A

Pheasant, guinea fowl

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87
Q

Which pathogen causes sinusitis in turkey?

A

M.gallisepticum

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88
Q

Picking on cloaca can lead to?

A

Bleeding out

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89
Q

Duck plague shed the virus?

A

Lifelong

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90
Q

Ornithobacterium is?

A

Facultative pathogen

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91
Q

Infectious bronchitis first replicate?

A

Resp.epithelium

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92
Q

Infectious bursitis susceptibility?

A

Up to 4 months of age

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93
Q

Lesion caused by very virulent strain in infectious bursitis?

A

Necrotic-hemorrhagic bursitis

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94
Q

What happens in EDS (egg drop syndrome)?

A

A drop in egg production, soft shelled, caused by Flavivirus

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95
Q

Which strain can cause death in ND (Newcastle disease)?

A

Velogenic

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96
Q

What is the causative agent of Coryza?

A

Avibacterium avium

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97
Q

Why does aortic rupture occur?

A

Genetic factors, females, 2-3 weeks of age

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98
Q

What is the causative agent of haemorrhagic tracheitis?

A

Infectious laryngeotracheitis virus (gallid herpesvirus 1)

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99
Q

Which pathogen causes sinusitis in turkeys?

A

Mycoplasma gallisepticum

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100
Q

What is Ornithobacterium?

A

Facultative pathogen

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101
Q

Where does infectious bronchitis first replicate?

A

Resp.epithelium

102
Q

When are the animals susceptible to infectious bursitis?

A

Up to 4 months

103
Q

What is the causative agent of Arizonosis?

A

Salmonella arizonae

104
Q

What is the quail disease?

A

Ulcerative enteritis, caused by Clostridium collinum

105
Q

Which species are affected by Trichomonosis?

A

pigeons

106
Q

What age are mostly affected by trichomonosis?

A

Young squabs, adults are just carriers

107
Q

Pathogen of gangrenous dermatitis?

A

Clostridium septicum, Cl.perfringens and Staphylococcus aureus

108
Q

Causative agent for fowl cholera?

A

Pasterurella multocida

109
Q

Which virus can cause proventriculus lesions?

A

Virulent strain of infectious bursitis

110
Q

Which bacteria does not cause gangrene?

A

Pasteurella multocida

111
Q

What is the main feature of Campylobacter jejuni?

A

Septicaemia

112
Q

What does acute borreliosis cause in geese?

A

Diarrhea and emaciation

113
Q

Why does pododermatitis often occur during diarrhea?

A

Exudation of skin (?), uric acid of feces

114
Q

What is the cause of Rickets?

A

Vit. D and/or phosphorous and/or calcium deficiency

115
Q

What causes rickets like osteopathies?

A

Niacin deficiency in geese

116
Q

When does rickets affect chickens?

A

5-6 weeks (3)

117
Q

What does bacterial spondylitis in birds usually affect?

A

6th thoracic vertebrae

118
Q

What does influenza virus cause in chicken?

A

Microencephaly

119
Q

What causes Crazy chicke disease?

A

Vit.E deficiency

120
Q

When does Crazy chicken disease manifest?

A

3-6 week old poultry

121
Q

What is inflammation of the white matter of the brain/spinal cord called?

A

Leukoencephalitis/ myelitis

122
Q

White string on the follicle that breaks when egg is released…

A

Stigma

123
Q

Bulla ossea syrinx…

A

Male mallard duck

124
Q

How does the pneumomycosis often develop in birds?

A

Via aerogenous route

125
Q

Which can cause proventriculitis?

A

Corona virus

126
Q

Which of the following leads to osteopetrosis in birds?

A

Retrovirus (leukosis, sarcoma)

127
Q

What is the causative agent of coryza?

A

Avibacterium paragallinarum

128
Q

What is a lesion of Derzys disease?

A

Fluid in cavities, serofibrinous

129
Q

What is hemorrhagic syndrome caused by?

A

Alternaria toxins (tenuazonic acid)

130
Q

Which species can get infectious anemia?

A

Chicken

131
Q

Acute laryngeotracheitis causes…

A

acute catarrhal inflammation

132
Q

Cause of turkey rhinitis

A

mycoplasma gallisepticum

133
Q

What does vitamin E deficiency cause?

A

Brain lesions

134
Q

Staph.aureus causes?

A

All of the above (folliculitis / cellulitis / pododermatitis)

135
Q

Mycoplasma synoviae…

A

cause tenosynovitis and arthritis

136
Q

Rimerelosis…

A

causes exudative serositis

137
Q

Green muscle/ Oregon disease…

A

Constitutional lesion

138
Q

What causes Angara disease?

A

Adenovirus (hydropericardium hepatitis syndrome)

139
Q

Campylobacter affects mainly…

A

Layer chickens

140
Q

Age group for infectious Coryza?

A

8-12 weeks

141
Q

What causes caseous colitis?

A

All (rough feed / salmonella / intestinal spirochaetosis)

142
Q

Cause of hemorrhagic enteritis in turkeys?

A

Adenovirus

143
Q

What causes duck plague?

A

Alphaherpes virus

144
Q

Where is E.tenella in bird?

A

Cecum

145
Q

What does mesogenic strain of Newcastle disease cause?

A

Viraemia and resp.lesions in young chicks, neural signs (and decreased egg production) in adults

146
Q

Laryngotracheitis

A

Does NOT cause viraemia

147
Q

What does viral enteritides cause?

A

All (mal- secretion, -digestion, -absorption)

148
Q

What age does necrotic enteritis in chicken?

A

2-5 weeks

149
Q

Pox virus causes?

A

Bollinger bodies

150
Q

TRT and E.coli causes?

A

Swollen head

151
Q

When does necrobiotic fatty infiltration of the liver affect turkey ?

A

12-14 weeks

152
Q

Peracute duck viral hepatitis causes?

A

Necrotic hemorrhagic liver dystrophy

153
Q

What causes «epidemic tremor»?

A

Virus

154
Q

What does gizzerosine cause?

A

Ulceration of gizzard

155
Q

Acute fowl typhoid causes?

A

Acute septic hyperaemic splenitis

156
Q

Angara disease is caused by?

A

Adenovirus

157
Q

Sudden death often occurs in…

A

Meat type birds

158
Q

Which of the following could cause this lesion (picture of joint)

A

All (orthoreovirus / staph.aureus / M.synoviae)

159
Q

Pneymomycosis can metastatise…

A

Eye / Brain

160
Q

Lack of vitamin B1 causes

A

Degeneration of the myelin sheaths and Schwann cells

161
Q

Hen paralysis…

A

Marek’s disease

162
Q

Dermatitis caused by

A

Staphylococcus aureus

163
Q

Cellulitis caused by

Inflammation of the subcutaneous tissue

A

E. coli bacteria

164
Q

staphylococcosis

A 
– folliculitis (inflammation of the feather follicules)
 – epidermitis
– dermatitis
– pododermatitis
sometimes. cellulitis also occurs
165
Q

Gangrenous dermatitis

A

Staphylococcus aureus
Clostridium perfringens type A
Clostridium septicum

166
Q

wing gangrena disease

A

bluewingdisease – BWD
• wingrotdisease – WRD
hemorrhages on the wing Immunosuppression needed!

167
Q

Virus induced dermatitis

A

Avian pox

168
Q

Avian pox Pathogenesis:

A

The infective virus is localized in the dead, desquamated epithelial cells
– Infection: aerogen, per conjunctiva or per os • With the dust in the stable

169
Q

Avian pox • Pathogenesis:

A

– The virus replicates in the epithelial cells of the epithelial layer at the place of entrance
• reticular and ballooning degeneration
– viraemia follows
• primary viraemia
– Proliferation in the parenchymal organs
– ….. next viraemia
• secondary viraemia
– the virus gets to the skin, respiratory tract, GI
tract
– new replication phase starts……. (it is fatal)

170
Q

Types of avian pox

A

Skinform

• Mucous membrane form
– mucous membrane of the GI and respiratory tract – conjunctiva

• Mixedform

171
Q

Mushy chicken syndrome can cause

A
  • embryonic and fetal death
  • suffocation during hatching
  • low vitality chicken
172
Q

Weak, low vitality chicken

A 
– Yolk sac remains outside of body
– Unhealed, open navel 
– Yolk sac contains not
enough nutrient
– Subcutaneous fat depots
are missing
– Bodyweight is small, smaller than expected
173
Q

Mushy chicken syndrome

• Consequences and complications:

A 
• Omphalitis
– inflammation of the navel and yolk sac 
– Sero-fibrinous peritonitis
– Bacterial septicaemia
• E. coli, Pseudomonas sp., Proteus sp.
174
Q

Candidiasis Pathogens:

A

– Candida albicans (most often seen)
– C. krusei, C. lambica
– Saccharomyces cerevisiae
– pseudohyphae formation by the yeasts

175
Q

Candidiasis background

A

Regular members of
• the birds’ environment
• the gastrointestinal tract
– oropharyngeal cavity, oesophagus, crop, glandular and muscular stomach, intestines

Facultative pathogens
• immunosuppression
• longlasting antibiotic treatment
• diseases leading to anorexia
– enteritis
• periodic or constant overeating
– broiler industry, forced feeding of goose and duck
176
Q

Candidiasis causes

A

In the oropharyngeal cavity (OPC):
– circumscribed or diffuse appearance
– easily removable greyish-white layer, superficial necrotic inflammation
OR
– deep necrotic inflammation, later erosions and ulcers, even rupture of the oesophagus
– The mucous membrane of the OPC • thickened, uneven, firm and dull (matt)
– metastasis to the brain, eye (rare)

177
Q

Vitamin A deficiency

A 
hyperkeratosis
conjunctiva and cornea dries out = xerophthalmia
kidney failure
– azotaemia, uraemia
degeneration of the neurons
Long bones decreased ossification
compression of the brain and spinal cord
Ovary
• degeneration and necrosis in the follicles
Testicles
• decreased spermyocytogenesis
178
Q

Trichomonosis pathogen

A

Trichomonas gallinae
Flagellated protozoa
Older pigeons carry the pathogen
– The young pigeons show symptoms

179
Q

Types of proventriculitises:

A

bacterial
viral
fungi

180
Q

Viral proventriculitis

A 
– Adenovirus infection
– Infectious bronchitis virus
– Mucous membrane form of avian pox
• See previous lecture
– Transmissible viral proventriculitis
• Similar disease, but unknown causative agent
 Viral diseases accompanied with proventriculitis: 
• Avian influenza
• Newcastle disease
• Avian pox
• Infectious bursitis
181
Q

Infectious bronchitis of chicken

• Pathogen:

A

Coronavirus

182
Q

Infectious bronchitis of chicken

Several different forms of the disease

A

– Respiratory form
– Urinary form (kidney lesions)
– Gastrointestinal form
• proventriculitis Result: maldigestion

183
Q

Ulceration of the gizzard

A 
in broilers and layers
• Cause: 
stress-- histamine
– Copper overdose (Cu sulfate) 
– Zn (zinc) overdose
– gizzerosine
184
Q

Effect of gizzerosine

A

• increased gastric juice production
• hyperactive gastric juice, H2-receptors!
– Malfunction of the glands
– Thinner and less resistant koilin membrane is produced
– Peptic ulcer develops
• Due to hyperactive gastric juice

185
Q

Virus induced gizzarditis

A

pox and adenovirus

186
Q

What does erysipelas cause?

A

Enlarged spleen

187
Q

The chronic respiratory disease complex (CRD) of poultry may be caused by?

A

All of the above
Mycoplasma gallisepticum
Mycoplasma meleagridis
Turkey rhinotracheitis virus (TRT)

188
Q

Which organs are affected in the late state of malleus?

A

Mucous membranes of nasal cavity, skin

189
Q

The malleotic nodule is?

A

Pyogranuloma with narrow demarcation zone

190
Q

Why is it called “swollen head” disease?

A

Because of the pathogen

191
Q

What lesions are typically seen in case of viraemia in birds?

A

Airsacculitis

192
Q

In Newcastle disease the pathological lesion(s) is/are?

A

Pneumonia and enteritis

193
Q

Which of the following is the most common cause of pneumomycosis in birds?

A

Aspergillus sp.

194
Q

How does the pneumomycosis most often develop in birds?

A

aerogenous route

195
Q

Which of the following diseases causes granuomatous pneumonia in birds?

A

Mycoplasmosis

196
Q

What is an often observed complication in birds in case of pneumomycosis?

A

All of the above
Airsac mycosis
Metastasis to the brain
Metastasis to the eyeball

197
Q

What is the typical age group in birds for pneumomycosis?

A

Up to a few weeks after hatching

198
Q

Who has a spotted egg?

A

Turkey

199
Q

Besides the muscular pathology, what other changes can be seen in birds with vitamin E and Se deficiency?

A

Exudative diathesis and encephalomalacia

200
Q

Which of the following changes are characteristic for rickets?

A

Uncalcified cartilage and osteoid tissue in the growing zone

201
Q

In which case is there a decreased osteoid formation in the traberculae of the bones?

A

Ca deficiency

202
Q

What is one inner criteria leading to the development of constitutional myopathy?

A

Fatty degeneration of myocytes

203
Q

What are the properties of the of Mannheimia haemolytica and Pasterurella multocida?

A

Facultative pathogen

204
Q

Which is the main form of pneumonias?

A

croupous

205
Q

Which bacteria can cause proventriculitis?

A

All of the above
Pox virus
Adeno virus
Corona virus

206
Q

Oregon disease

A

Necrosis of the deep pectoral muscle in broiler chicken

207
Q

What happens in EDS (Egg drop syndrome)?

A

A drop in egg production, perhaps soft shelled, caused by flavivirus

208
Q

Which strain can cause death in ND (Newcastle Disease)?

A

Velogenic

209
Q

What is the causative agent of Coryza?

A

Avibacterium avium

210
Q

What is the different name for hydropericardium?

A

Increased pulmonary arterial pressure disease

211
Q

What is the susceptible age for Derzys disease?

A

1-4 weeks

212
Q

What is the susceptible age for Rimerelliosis?

A

2-8 weeks

213
Q

Which species are susceptible to Rimerelliosis?

A

Goose and duck

214
Q

What does rupture/degradation of follicles lead to?

A

Serositis

215
Q

What is the route of mycosis infection in young birds?

A

Inhalation

216
Q

What is the causative agent of haemorrhagic tracheitis?

A

Infectious laryngeotracheitis virus (Gallid herpesvirus I)

217
Q

Infectious coryza can infect chickens and?

A

Pheasant, guinea fowl

218
Q

Which pathogen causes sinusitis in turkeys?

A

Mycoplasma gallisepticum

219
Q

What is Ornithobacterium?

A

Facultative pathogen

220
Q

Where does infectious bronchitis first replicate?

A

Respiratory epithelium

221
Q

What lesions are caused by very virulent strains in infectious bursitis?

A

Necrotic-haemorrhagic bursitis

222
Q

What is the quail disease?

A

Ulcerative enteritis, caused by Clostridium colinum

223
Q

What organ is affected in “black head disease”?

A

Liver, caecum

224
Q

What is the causative agent of Derzy’s disease?

A

parvovirus

225
Q

What is the main feature of Campylobacter jejuni?

A

Septicaemia

226
Q

In which disease can we see Bollinger bodies?

A

Avian pox virus

227
Q

What is the vector of Borrelia?

A

avian tick

228
Q

What does acute borreliosis cause in geese?

A

Diarrhoea and emaciation

229
Q

What is Ca deposits in long bones called?

A

Osteothesaurisomosis

230
Q

What is the cause of rickets?

A

Vitamin D and/or phosphorous and/or calcium deficiency

231
Q

What causes causes rickets like osteopathies?

A

Niacin deficiency in geese

232
Q

What is characteristic of osteoporosis?

A

Decomposition of bone trabercule is normal, but osteogenesis is slow

233
Q

When does rickets affect chickens?

A

5-6 weeks (3)

234
Q

What does mycotic spondylitis in birds usually affect?

A

Last cervical and first thoracic vertebrae

235
Q

What does bacterial spondylitis in birds usually affect?

A

Also 6th thoracic vertebrae

236
Q

What does influenza virus cause in chickens?

A

Microencephaly

237
Q

What causes “crazy chicken disease”?

A

Vitamin E deficiency

238
Q

When does “crazy chicken disease” manifest?

A

3-6 week old poultry

239
Q

What is inflammation of the white matter of the brain/spinal cord called?

A

Leukoencephalitis/Myelitis

240
Q

Cause of turkey rhinitis

A

Mycoplasma gallisepticum

241
Q

Mycoplasma synoviae causes

A

tenosynovitis and arthritis

242
Q

Rimerelosis

Causes

A

Exudative serositis

243
Q

Green muscle/Oregon disease

A

Constitutionallesion

244
Q

Campylobacter affects mainly

A

Layer chickens

245
Q

Cause of haemorrhagic enteritis in turkeys

A

adenovirus

246
Q

What causes duck plague

A

herpes virus

247
Q

Where is E. Tenella in bird

A

cecum

248
Q

What does mesogenic strain of new castledisease cause

A

Viremia in young chicks

249
Q

What age does necrotic enteritis in chicken?

A

2-5 weeks

250
Q

Infectious bursitis can affect which age group?

A

Until 4 months of age

Patho poultry (1 decks)

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