A parvovirus isolated from royal python (Python regius) is a member of the genus Dependovirus

Area of Science:

• Virology
• Herpetology
• Molecular Biology

Background:

• Parvoviruses are small, single-stranded DNA viruses with diverse hosts.
• Reptilian viruses, particularly parvoviruses, are underrepresented in scientific literature.
• Previous research has not identified parvoviruses in snakes like Python regius and Boa constrictor.

Purpose of the Study:

• To isolate and characterize parvoviruses from snakes.
• To determine the genomic organization and phylogenetic relationships of a novel snake parvovirus.
• To propose a classification for the newly identified serpentine parvovirus.

Main Methods:

• Isolation and propagation of viruses in viper heart (VH-2) and iguana heart (IgH-2) cell lines.
• Cloning and sequencing of the full-length viral genome.
• Bioinformatic analysis of genomic organization, gene homology, and structural features.

Main Results:

• A novel parvovirus was successfully isolated and propagated from Python regius and Boa constrictor.
• The virus possesses a 4432-nt genome with typical parvovirus organization, including inverted terminal repeats (ITRs) and two open reading frames.
• Genomic and structural analyses revealed similarities to adeno-associated viruses (AAVs) and waterfowl parvoviruses, suggesting a close relationship to the genus Dependovirus.

Conclusions:

• This study reports the first identification and characterization of a parvovirus from snakes.
• The novel virus, proposed as serpentine adeno-associated virus (SAAV), shares key features with AAVs.
• The findings necessitate the expansion of the Dependovirus genus to include this serpentine parvovirus, advancing reptile virology.