Ecological features, pathogenic properties, and role of Staphylococcus intermedius group representatives in animal and human infectious pathology

The paper reports changes in the species nomenclature in the genus Staphylococcus that involve the most pathogenic representatives of the genus, the coagulase-positive staphylococci cluster. To date, this cluster includes six species in addition to Staphylococcus aureus : S. intermedius , S. schleiferi spp. coagulans , S. lutrae , S. hyicus , S. pseudintermedius , and S. delphini . Special attention was given to the representatives of the Staphylococcus intermedius group (SIG), which encompasses three closely related species, S. intermedius , S. pseudintermedius , and S. delphini , whose hosts are mammals and birds living in close proximity to human beings. The current data on the pathogenicity factors and role of SIG representatives in animal and human infectious pathologies were analyzed. The approaches to species identification, together with ecological and epidemiological features, and antibiotic susceptibility were considered. Specific biological features of S. pseudintermedius , the species most similar to S. aureus , are considered from the perspective of the properties of newly emerging pathogens.