High-quality draft genome sequence and description of Haemophilus massiliensis sp. nov

Cheikh Ibrahima Lo1, Senthil Alias Sankar2, Bécaye Fall3

  • 1Aix-Marseille Université, URMITE, UM63, CNRS 7278, IRD 198, Inserm U1095, Faculté de médecine, Marseille, France ; Campus international UCAD-IRD, Dakar, Senegal.

Insights

A novel bacterium, Haemophilus massiliensis, was identified from pelvic peritonitis fluid. This Gram-negative bacterium represents a new species within the Pasteurellaceae family, expanding our understanding of microbial diversity.

Area of Science:

  • Microbiology
  • Bacteriology
  • Genomics

Background:

  • Pelvic peritonitis can be caused by various bacterial pathogens.
  • Accurate identification of causative agents is crucial for effective treatment.

Observation:

  • A novel bacterial strain, FF7(T), was isolated from a patient with pelvic peritonitis.
  • Strain FF7(T) showed low 16S rRNA sequence identity (94.8%) with Haemophilus parasuis and poor MALDI-TOF MS identification scores.

Findings:

  • Polyphasic analysis characterized strain FF7(T) as a Gram-negative, facultatively anaerobic rod.
  • Genomic analysis revealed a 2.44 Mbp genome with 2,319 protein-coding genes and 67 RNA genes.
  • Based on phenotypic and genomic data, strain FF7(T) is proposed as the type strain of a new species, Haemophilus massiliensis.

Implications:

  • The discovery of Haemophilus massiliensis expands the known diversity within the Pasteurellaceae family.
  • This finding may contribute to a better understanding of the microbial etiology of peritonitis.
  • Further research is needed to determine the clinical significance and pathogenic potential of this new species.

Related Concept Videos

Bacterial Phylum Tenericutes01:24

Bacterial Phylum Tenericutes

The phylum Tenericutes, which includes the single class Mollicutes, comprises bacteria that lack cell walls. The term "Mollicutes" derives from the Latin word mollis, meaning "soft." These organisms are among the smallest known and are commonly referred to as mycoplasmas due to the prominence of the genus Mycoplasma, which includes well-known human pathogens. Despite their inability to stain gram-positively (a result of their lack of cell walls), mycoplasmas are phylogenetically related to the...
578
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
830
Bacterial Phylum Spirochaetes01:30

Bacterial Phylum Spirochaetes

Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased...
1.1K
DNA Bacteriophages01:26

DNA Bacteriophages

Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...
1.3K
Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
50.4K
Evolution of Microbial Genome01:08

Evolution of Microbial Genome

Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
13