Viruses are constantly evolving to infect new hosts and expand their host range. This process can occur through a variety of mechanisms, including mutations, recombination, and adaptation.

In this study, researchers investigated the host range expansion of parvoviruses in domestic and wild carnivores. Parvoviruses are small, single-stranded DNA viruses that can cause a variety of diseases in animals, including gastroenteritis, myocarditis, and panleukopenia.

The researchers analyzed the genetic sequences of parvoviruses from a variety of carnivore species, including domestic dogs, cats, and ferrets, as well as wild carnivores such as lions, tigers, and bears. They found that parvoviruses have a broad host range within the order Carnivora, and that they have repeatedly jumped between different host species.

The researchers also identified a number of genetic changes that have occurred in parvoviruses as they have expanded their host range. These changes include mutations in the viral capsid protein, which is responsible for binding to the host cell receptor. The researchers believe that these changes have allowed parvoviruses to infect new host species by enabling them to bind to different receptors on the host cell surface.

The study provides new insights into the mechanisms by which viruses expand their host range. The findings have implications for understanding the emergence of new viral diseases and for developing strategies to prevent and control viral infections.

Key Findings:

* Parvoviruses have a broad host range within the order Carnivora, and they have repeatedly jumped between different host species.

* Parvoviruses have undergone a number of genetic changes as they have expanded their host range, including mutations in the viral capsid protein.

* The findings provide new insights into the mechanisms by which viruses expand their host range.