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Generating Whole Bacterial Genomes from Clinical Samples using a Target Enrichment Workflow
Published on: August 15, 2025
Draft genome sequences of two opportunistic pathogenic strains of Staphylococcus cohnii isolated from human patients
Soraya Mendoza-Olazarán1, José F Garcia-Mazcorro2, Rayo Morfín-Otero3
1Servicio de Gastroenterología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León Mexico.
Abstract:
Herein, we report the draft-genome sequences and annotation of two opportunistic pathogenic strains of Staphylococcus cohnii isolated from humans. One strain (SC-57) was isolated from blood from a male patient in May 2006 and the other (SC-532) from a catheter from a male patient in June 2006. Similar to other genomes of Staphylococcus species, most genes (42%) of both strains are involved in metabolism of amino acids and derivatives, carbohydrates and proteins. Eighty (4%) genes are involved in virulence, disease, and defense and both species show phenotypic low biofilm production and evidence of increased antibiotic resistance associated to biofilm production. From both isolates, a new Staphylococcal Cassette Chromosome mec was detected: mec class A, ccr type 1. This is the first report of whole genome sequences of opportunistic S. cohnii isolated from human patients.
Insights
Genome sequencing of two opportunistic Staphylococcus cohnii strains reveals new Staphylococcal Cassette Chromosome mec. These findings shed light on antibiotic resistance in human infections.
Area of Science:
- Microbiology
- Genomics
- Infectious Diseases
Background:
- Staphylococcus cohnii is an opportunistic pathogen.
- Understanding its genome is crucial for combating infections.
Observation:
- Two S. cohnii strains (SC-57, SC-532) were isolated from human blood and catheter samples.
- Both strains exhibited low biofilm production and increased antibiotic resistance linked to biofilms.
Findings:
- Draft genome sequences and annotations for both S. cohnii strains were generated.
- Genes involved in metabolism (42%) and virulence (4%) were identified.
- A novel Staphylococcal Cassette Chromosome mec (SCCmec class A, ccr type 1) was detected in both isolates.
Implications:
- This study provides the first whole genome sequences of opportunistic S. cohnii from human patients.
- The findings contribute to understanding the genetic basis of S. cohnii pathogenicity and antibiotic resistance.
- Insights into SCCmec elements can inform strategies against Staphylococcal infections.
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