Longitudinal analysis of serotypes, virulence factors, and MLST profiles of Pasteurella multocida from porcine pneumonia in South Korea (2016–2023)

Key Points

• Evolving virulence patterns were identified in porcine pneumonia isolates, particularly serogroup B/ST9 variants.
• Key virulence factors hgbB and pfhA were found co-harbored in some isolates, indicating shifts in pathogen behavior.
• The analysis utilized a longitudinal approach across seven years, assessing changes in serotypes and MLST profiles.
• Ongoing molecular and genomic surveillance is crucial for devising effective control strategies and reducing health risks.