Study Uncovers Virulent Genes in Gut Bacteria

A recent study published in OMICS: A Journal of Integrative Biology uncovered genes for virulence and antimicrobial resistance in two bacteria that co-occur with Clostridioides difficile (C. difficile), highlighting these pathogens as potential threats to planetary health. The research, led by Thokur Sreepathy Murali, Ph.D., from Manipal Academy of Higher Education, India, and co-author Angela Brand, MD, Ph.D., MPH from Maastricht University, The Netherlands, performed comparative genome analyses of three Clostridia species: C. difficile, C. butyricum, and C. tertium.

C. difficile is a well-known pathogen that can cause severe gastrointestinal diseases such as diarrhea, colitis, and sepsis. The study aimed to investigate the potential threat posed by C. butyricum and C. tertium, which also reside in the gut and have the potential to harbor toxin/virulence genes. The researchers sequenced and characterized isolates of the three species to gain insights into their antimicrobial, cytotoxic, antiproliferative, genomic, and proteomic profiles.

While C. difficile exhibited the highest cytotoxic and antiproliferative potential, genome analysis uncovered the pathogenic potential of C. butyricum and C. tertium. Pangenome analysis further unveiled the presence of several accessory genes involved in fitness, virulence, and resistance characteristics in the core genomes of the sequenced strains. Detecting this array of virulence and antimicrobial resistance genes in C. butyricum and C. tertium suggests their ability to potentially emerge as pathogens with a significant impact on global health.

Vural Özdemir, MD, Ph.D., DABCP, Editor-in-Chief of OMICS, comments, "The study provides a timely application of comparative genomics in planetary health and opens up new avenues for diagnostics and therapeutics innovation." For future research, Özdemir encourages new insight into multi-omics applications in planetary health.