Term
| Birnaviridae Characteristics |
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Definition
bi= 2 segments; rna = RNA
non-enveloped, medium sized
segmented dsRNA
incubation period |
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Term
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Definition
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Term
| Birnaviridae Replication and Release |
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Definition
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Term
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Definition
Pre-B lymphocytes
macrophages |
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Term
| Birnaviridae Transmission |
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Definition
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Term
| Infectious Bursal Disease Characteristics |
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Definition
Birnaviridae
type 1 serotype in US
affects chickens 3-6 weeks of age
short incubation period |
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Term
| Infectious Bursal Disease Tropism |
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Definition
GI tract associated cells
lymphoid cells (especially pre-B-lymphocytes)
macrophages |
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Term
| Infectious Bursal Disease Pathogenesis |
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Definition
get virus from feces
primary replication in GI tract lymphocytes and macrophages
primary viremia in bursa of pre-B cells
secondary viremia infects other tissues |
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Term
| Infectious Bursal Disease Signs |
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Definition
| immunosuppression: B-cell deficiency, viral bursectomy, diminished antibody responses |
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Term
| Infectious Bursal Disease Transmission |
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Definition
horizontal - orofecal
possible vertical spread |
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Term
| Infectious Bursal Disease Control |
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Definition
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