recombination

Recombination between cellular and viral RNA produces a pathogenic virus

Bovine viral diarrhea virus is an economically important animal pathogen that may cause a fatal gastrointestinal disease in beef and dairy herds. Infection of a fetus with this virus during the first trimester leads to the birth of animals that are persistently infected for life. Some animals remain healthy, while others develop severe mucosal disease. …

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A plant virus that switched to vertebrates

Viruses can be transmitted to completely new host species that they have not previously infected. Usually host defenses stop the infection before any replication and adaptation can take place. On rare occasions, a novel population of viruses arises in the new host. These interspecies infections can sometimes be deduced by sequence analyses, providing a glimpse …

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