First investigation of Staphylococcus argenteus in a Brazilian collections of S. aureus isolated from bovine mastitis

Abstract

Background: Staphylococcus argenteus is a new specie positive coagulase staphylococci. We investigate the presence of S. argenteus in isolates previously classified as S. aureus, obtained from the milk of cows with mastitis in Brazil. Results: Among 856 S. aureus tested in chocolate agar, tryptone soya agar and salt egg yolk agar, white or colorless colonies were observed in 185 (21.6%) isolates. Regarding the ctrOPQMN operon, 111 (60%) presented the complete cluster. Despite some missing genes in this cluster, the remaining strains (74) were confirmed as S. aureus using the nrps gene. Conclusions: As far as we know, this is the first review of S. aureus collection in Brazil and S. argenteus does not appear to be a significant problem in Brazilian herds.

Transcriptional Profiling of Exosomes Derived from Staphylococcus aureus‐Infected Bovine Mammary Epithelial Cell Line MAC‐T by RNA‐Seq Analysis

“…Mastitis is a common and widespread infectious disease in dairy farms all over the world, which is characterized by inflammation of the mammary glands, resulting in a decrease in milk production and quality [ 1 – 3 ]. There are many kinds of pathogens of mastitis, and Staphylococcus aureus ( S. aureus ) is one of the important pathogens in subclinical mastitis [ 4 ]. S. aureus often causes clinical or subclinical mastitis, and the intramammary infections are usually characterized as mild, chronic, or persistent [ 5 ].…”

Staphylococcus singaporensis sp. nov., a new member of the Staphylococcus aureus complex, isolated from human clinical specimens

“…argenteus associates predominantly with human hosts, similar to S. aureus , although there has been recovery of this species from animal specimens [4, 5]. S.…”

“…S. argenteus and S. schweitzeri appear to have differing epidemiology. S. argenteus associates predominantly with human hosts, similar to S. aureus, although there has been recovery of this species from animal specimens [4,5]. S. argenteus is considered pathogenic and can cause skin and soft tissue infection or bacteremia comparable to S. aureus infections [4].…”

Description of Staphylococcal Strains from Straw-Coloured Fruit Bat (Eidolon helvum) and Diamond Firetail (Stagonopleura guttata) and a Review of their Phylogenetic Relationships to Other Staphylococci

“…One has been named S. argenteus , due to its lack of the “golden” carotenoid pigment staphyloxanthin ( Holt et al., 2011 ) regarded as a unique property of S. aureus . Isolates assigned or re-assigned to this new species have been described in many countries including Australia ( Ng et al., 2009 ), Thailand ( Indrawattana et al., 2019 ; Pumipuntu, 2019 ), Laos ( Yeap et al., 2017 ), Cambodia ( Ruimy et al., 2009 ), Myanmar ( Aung et al., 2019 ), Japan ( Ohnishi et al., 2018 ; Aung et al., 2019 ; Kitagawa et al., 2020 ), China and Taiwan ( Chen et al., 2018 ), on Indian Ocean islands such as the Comoros or Mayotte ( Dupieux et al., 2015 ), Gabon ( Schuster et al., 2017 ), Trinidad and Tobago ( Monecke et al., 2014 ) and Brazil ( Rossi et al., 2020 ). Sporadic isolates also have been identified in the United Arab Emirates ( Senok et al., 2020 ), several European countries ( Dupieux et al., 2015 ; Rigaill et al., 2018 ; Tång Hallbäck et al., 2018 ; Diot et al., 2020 ; Kukla et al., 2020 ; Söderquist et al., 2020 ) as well as in Canada and the United States of America ( Eshaghi et al., 2021 ).…”