Avian parvovirus: classification, phylogeny, pathogenesis and diagnosis

Area of Science:

• Virology
• Molecular Biology
• Animal Health

Background:

• Poultry parvoviruses are globally distributed in young birds, affecting both those with enteric disease and healthy individuals.
• Chicken parvovirus (ChPV) and turkey parvovirus (TuPV) are classified under the Aveparvovirus genus.
• These viruses are small, non-enveloped, single-stranded DNA viruses with specific protein-encoding genes (NS, NP, VP1, VP2).

Purpose of the Study:

• To review current knowledge on poultry parvoviruses.
• To emphasize taxonomy, phylogenetic relationships, genomic analysis, epidemiology, pathogenesis, and diagnostic methods.
• To highlight the need for vaccine development due to the absence of commercial vaccines.

Main Methods:

• Review of existing literature and experimental studies on poultry parvoviruses.
• Analysis of genomic structure and protein functions (NS, NP, VP1, VP2).
• Evaluation of current diagnostic techniques such as PCR, real-time PCR, ELISA, and next-generation sequencing.

Main Results:

• Poultry parvoviruses are implicated as candidate pathogens in enteric disease syndromes.
• Diagnostic methods have evolved, with next-generation sequencing enabling rapid, simultaneous detection.
• A unique characteristic is the absence of the phospholipase A2 sequence motif in the VP1-unique region compared to other parvoviruses.

Conclusions:

• Poultry parvoviruses represent a significant concern in avian health.
• Advancements in diagnostics facilitate better detection and understanding of these viruses.
• The development of effective vaccines is a critical priority for controlling poultry parvovirus infections.