Virulence factors, antimicrobial resistance and phylogeny of bovine mastitis-associated Streptococcus dysgalactiae .
Bruna Lourenço CrippaMarjory Xavier RodriguesTiago TomaziYongqiang YangLiliana de Oliveira RochaRodrigo Carvalho BicalhoNathália Cristina Cirone SilvaPublished in: The Journal of dairy research (2023)
We carried out a thorough genetic evaluation of Streptococcus dysgalactiae isolated from clinical bovine mastitis cases and performed a phylogenetic analysis to represent the evolutionary relationship between S. dysgalactiae sequences. A total of 35 S. dysgalactiae strains were isolated from cases of clinical mastitis identified at a large commercial dairy farm located near Ithaca, New York. Whole-genome sequencing identified twenty-six antibiotic resistance genes, four of which were acquired genes, in addition to fifty virulence genes. Multi-locus sequence typing detected three new sequence types (STs). We conclude that a high proportion of this microorganism carries multiple virulence determinants and resistance genes, and that this indicates its potential to cause mastitis. Eight different STs were identified, of which ST453 ( n = 17) was the most prevalent and ST714, ST715, ST716 were novel STs.
Keyphrases
- antimicrobial resistance
- genome wide
- biofilm formation
- escherichia coli
- antibiotic resistance genes
- pseudomonas aeruginosa
- staphylococcus aureus
- bioinformatics analysis
- candida albicans
- genome wide identification
- dna methylation
- microbial community
- gene expression
- genome wide analysis
- wastewater treatment
- copy number
- genetic diversity
- cystic fibrosis
- amino acid
- transcription factor