Interindividual Spread of Herpesviruses

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Abstract
Interindividual spread of herpesviruses is essential for the virus life cycle and maintenance in host populations. For most herpesviruses, the virus-host relationship is close, having coevolved over millions of years resulting in comparatively high species specificity. The mechanisms governing interindividual spread or horizontal transmission are very complex, involving conserved herpesviral and cellular proteins during the attachment, entry, replication, and egress processes of infection. Also likely, specific herpesviruses have evolved unique viral and cellular interactions during cospeciation that are dependent on their relationship. Multiple steps are required for interindividual spread including virus assembly in infected cells; release into the environment, followed by virus attachment; and entry into new hosts. Should any of these steps be compromised, transmission is rendered impossible. This review will focus mainly on the natural virus-host model of Marek’s disease virus (MDV) in chickens in order to delineate important steps during interindividual spread.

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