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14 Cards in this Set
- Front
- Back
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Avian pox
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Fowlpox
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-Proliferative lesions in skin and mucosae of respiratory and digestive tract
-caused by Poxviridae -Survives in environment and dry scabs for a long time -Cutaneous form -Diptheric (soft plaques or lesions in oral or upper respiratory mucosae) -virulent strains may cause lesions in internal organs |
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Herpesvirus disease
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Infectious Laryngotracheitis
Marek's disease |
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Adenovirus dieases
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Turkey hemorrhagic enteritis
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Circovirus disease
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Chicken anemia
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Birnavirus disease
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Infectious bursal disease
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Paramyxovirus disease
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Newcastle disease
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Pathotypes of newcastle disease virus
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1. viscerotropic velogenic: gut hemorrhagic lesions, high mortality
2. neurotropic velogenic: respiratory/neurologic signs, high mortality 3. mesogenic: acute respiratory/nervous sign, low mortality 4. lentogenic: mild/inapparent respiratory infections 5. asymptomatic enteric: avirulent |
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Pathogenicity tests for newcastle disease virus
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1. mean death time in embryonate eggs
2. intracerebral pathogencitiy index in 1-day-old chicks 3. intravenous pathogenicity index in 6-week-old chickens 4. intracloacal inoculation pathogenicity test in 6-8-week old chickens |
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Orthomyxovirus disease
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Avian influenza
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Avian influenza
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-sudden increase in mortality, respiratory distress, blue comb, nervous signs
-must be differentiated from newcastle disease -highly pathogenic strains of avian influenza (HPAI) |
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Coronavirus disease
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Infectious Bronchitis
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Infectious Bronchitis
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-systemic disease after respiratory infection affecting ovaries and kidneys but little gastrointestinal affect
-some birds persistently excrete virus after recovery -vaccine control difficult due to many antigenic variants and serotypes |
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Similar viruses to Coronavirus causing infectious bronchitis
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Blue comb disease/transmissible enteritis infecting turkeys
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