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<p>The microscopical examination revealed the typical features of <i>Metastrongylus salmi</i>, in the present study. The PCR amplification and sequencing of the COX1 gene confirmed 99.7–100% nucleotide identity with reference to <i>M. salmi</i> sequences and less identity with other <i>Metastrongylus</i> species. The phylogenetic analysis grouped the Indian isolates with Brazilian <i>M. salmi</i> sequences in a well-supported clade. Pairwise identity analysis demonstrated clear genetic divergence from <i>M. apri</i> and <i>M. pudendotectus</i>. Haplotype network analysis revealed 15 distinct haplotypes across <i>Metastrongylus</i> species, indicating substantial genetic differentiation. Mismatch distribution analysis suggested a stable population of <i>M. salmi</i> with potential sub-structuring. These findings enhance our understanding of the genetic diversity and evolutionary patterns of <i>M. salmi</i>, with implications for its epidemiology and control.</p>

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First report of molecular characterization of Metastrongylus salmi in pigs from Karnataka, India using mitochondrial COX1 gene

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • Siju Susan Jacob,
  • Snigdha Madhaba Maharana,
  • Kempashi Jayachandra,
  • Narayanaswamy Pradeep,
  • Jagadish Hiremath,
  • Sharanagouda S. Patil,
  • Pinaki Prasad Sengupta

摘要

The microscopical examination revealed the typical features of Metastrongylus salmi, in the present study. The PCR amplification and sequencing of the COX1 gene confirmed 99.7–100% nucleotide identity with reference to M. salmi sequences and less identity with other Metastrongylus species. The phylogenetic analysis grouped the Indian isolates with Brazilian M. salmi sequences in a well-supported clade. Pairwise identity analysis demonstrated clear genetic divergence from M. apri and M. pudendotectus. Haplotype network analysis revealed 15 distinct haplotypes across Metastrongylus species, indicating substantial genetic differentiation. Mismatch distribution analysis suggested a stable population of M. salmi with potential sub-structuring. These findings enhance our understanding of the genetic diversity and evolutionary patterns of M. salmi, with implications for its epidemiology and control.