Article (Scientific journals)
Identification of staphylococcal cassette chromosome mec in Staphylococcus aureus and non-aureus staphylococci from dairy cattle in Belgium: Comparison of multiplex PCR and whole genome sequencing
Ngassam Tchamba, Cyrille; Touzain, Fabrice; Fergestad, Marte et al.
2023In Research in Veterinary Science, 155, p. 150-155
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Keywords :
Dairy; cattle; Methicillin; resistance; Staphylococcal; cassette; chromosome; SCCmec; Multiplex; PCR; Whole; genome; sequencing
Abstract :
[en] The present study compared multiplex PCR (mPCR) and Whole Genome Sequencing (WGS) using the SCCmecFinder database to identify the Staphylococcal Cassette Chromosome (SCC) mec in five Staphylococcus aureus (SA) and nine non-aureus staphylococci (NAS) isolated from dairy cattle. mPCR identified an SCCmecIV in four SA and one NAS, but could not differentiate between SCCmecII and IV in the fifth SA, that all harbored the mecA gene and were phenotypically resistant to cefoxitin. SCCmecFinder confirmed the presence of an SCCmecIVc(2B) in four SA and of the SCCmecIVa(2B) in the fifth SA and the one NAS. Both methods also detected one untypeable SCCmec in another cefoxitin-resistant NAS harboring the mecA gene and a pseudo SCCmec in one cefoxitinsensitive NAS harboring one mecC-related gene. No SCCmec elements were identified either in one cefoxitinsensitive NAS harboring the mecA2 gene, or in five NAS (one resistant and four sensitive to cefoxitin) harboring the mecA1 gene. SCCmecFinder could even not identify the presence of any mecA1 gene in these five NAS, whose presence was nevertheless confirmed by ResFinder. The conclusions of this study are: (i) mPCR and WGS sequencing using SCCmecFinder are complementary methodologies to identify SCCmec; (ii) SCCmecFinder and ResFinder to a lesser extent cannot identify all mec gene allotypes; (iii) a specific classification of the SCCmec in NAS would be epidemiologically helpful; (iv) presence of a mecA gene and a complete SCCmec is linked to cefoxitin resistance, whereas presence of other mec genes and of pseudo or no SCCmec is not.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Ngassam Tchamba, Cyrille
Touzain, Fabrice
Fergestad, Marte
De Visscher, Anneleen
L'Abee-Lund, Trine
De Vliegher, Sarne
Wasteson, Yngvild
Blanchard, Yannick
Argudín, Maria A.
Mainil, Jacques  ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI)
Thiry, Damien  ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI) > Bactériologie vétérinaire et maladies bactériennes animales
 These authors have contributed equally to this work.
Language :
English
Title :
Identification of staphylococcal cassette chromosome mec in Staphylococcus aureus and non-aureus staphylococci from dairy cattle in Belgium: Comparison of multiplex PCR and whole genome sequencing
Publication date :
January 2023
Journal title :
Research in Veterinary Science
ISSN :
0034-5288
eISSN :
1532-2661
Publisher :
Elsevier BV
Volume :
155
Pages :
150-155
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 24 January 2023

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