Porcine circovirus diseases.

Area of Science:

• Veterinary Virology
• Swine Pathology
• Molecular Biology

Background:

• Porcine circovirus type 2 (PCV2) is a globally distributed virus causing significant swine diseases (PCVD).
• Key PCVD include postweaning multisystemic wasting syndrome (PMWS), porcine dermatitis and nephropathy syndrome (PDNS), and reproductive disorders.
• PMWS is the most economically impactful, primarily affecting young pigs with wasting as a key sign.

Purpose of the Study:

• To review and synthesize the latest scientific information on Porcine circovirus type 2 (PCV2).
• To summarize current knowledge regarding the biology of PCV2 and its associated diseases (PCVD).
• To provide an overview of the most relevant aspects of PCV2 and PCVD based on recent research.

Main Methods:

• Literature review of scientific publications on PCV2 and PCVD from the past 8 years.
• Synthesis of data on PCV2 biology, including its genome and viral family (Circoviridae).
• Compilation of information on clinical manifestations, diagnosis, and pathogenesis of PCVD.

Main Results:

• PCV2 is a small, non-enveloped virus with a circular, single-stranded DNA genome.
• PMWS diagnosis involves histopathology of lymphoid tissues and PCV2 detection; it's a multifactorial disease.
• Associations of PCV2 with PDNS and reproductive disorders are noted, though definitive proof for PDNS is pending.

Conclusions:

• Effective control of PCV2-associated diseases requires understanding farm-specific co-factors.
• Ongoing research continues to expand knowledge on PCV2 pathogenesis and disease management.
• This review consolidates current understanding of PCV2 biology and its significant impact on swine health.