Infectious Bursal Disease Virus

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Infectious Bursal Disease Virus

Characteristics of the symbiont/pathogen

The Infectious Bursal Disease Virus is small, non-enveloped virus, apart of the family Birnaviridae(2). The virus has a single capsid shell made up of 32 capsomers. It has a diameter of 60 to 70 nanometers. The sequenced genome of the virus is broken down into RNA two segments. The first, larger segment is about 3400 base pairs and the second, smaller segment is about 2800 base pairs long(2).

Characteristics of the host

The virus causing infectious bursal disease mainly affects chicken and other avian animals. Young chicks are affected within the first 6 weeks of life.

What host/s is/are involved? Is there host specificity? Are there secondary reservoirs?

Negatively stained IBDV particle." [1]

Host-Symbiont Interaction

What kind of interaction do host and symbiont have? How is the host affected by the relationship? How does the host acquire and transmit the symbiont? Is the interaction obligate or facultative?

Molecular Insights into the Symbiosis

Describe molecular/genetic studies on the symbiosis.

Ecological and Evolutionary Aspects

What is the evolutionary history of the interaction? Do particular environmental factors play a role in regulating the symbiosis?

Recent Discoveries

Describe two findings on the symbiosis published within the last two years.

References

(1)Hirai, K. and Shimakura, S. (1974). Structure of Infectious Bursal Disease Virus. Journal of Virology 14:957-964.

(2)Van den Berg, T.P. (2000).Acute infectious bursal disease in poultry: a review. Avian Pathology 29: 175–194.

(3)Rubinelli, P., Lin, T.L. (2007). Molecular detection and differentiation of infectious bursal disease virus. Avian Diseases 51: 515-526.

Edited by Helena Shadid (Helenashadid), students of Grace Lim-Fong

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