High Resolution Typing by Whole Genome Mapping Enables Discrimination of LA-MRSA (CC398) Strains and Identification of Transmission Events

After its emergence in 2003, a livestock-associated (LA-)MRSA clade (CC398) has caused an impressive increase in the number of isolates submitted for the Dutch national MRSA surveillance and now comprises 40% of all isolates. The currently used molecular typing techniques have limited discriminatory power for this MRSA clade, which hampers studies on the origin and transmission routes. Recently, a new molecular analysis technique named whole genome mapping was introduced. This method creates high-resolution, ordered whole genome restriction maps that may have potential for strain typing. In th... Mehr ...

Verfasser: Bosch, T.
Verkade, E.
van Luit, M.
Pot, B.
Vauterin, P.
Burggrave, R.
Savelkoul, P.
Kluytmans, J.
Schouls, L.
Dokumenttyp: Artikel
Erscheinungsdatum: 2013
Reihe/Periodikum: Bosch , T , Verkade , E , van Luit , M , Pot , B , Vauterin , P , Burggrave , R , Savelkoul , P , Kluytmans , J & Schouls , L 2013 , ' High Resolution Typing by Whole Genome Mapping Enables Discrimination of LA-MRSA (CC398) Strains and Identification of Transmission Events ' , PLOS ONE , vol. 8 , no. 6 , 66493 . https://doi.org/10.1371/journal.pone.0066493
Schlagwörter: RESISTANT STAPHYLOCOCCUS-AUREUS / FIELD GEL-ELECTROPHORESIS / METHICILLIN-RESISTANT / ST398 / NETHERLANDS / PIGS
Sprache: Englisch
Permalink: https://search.fid-benelux.de/Record/base-29603547
Datenquelle: BASE; Originalkatalog
Powered By: BASE
Link(s) : https://cris.maastrichtuniversity.nl/en/publications/39f44353-6b14-4e11-aa38-051dec95ddbc

After its emergence in 2003, a livestock-associated (LA-)MRSA clade (CC398) has caused an impressive increase in the number of isolates submitted for the Dutch national MRSA surveillance and now comprises 40% of all isolates. The currently used molecular typing techniques have limited discriminatory power for this MRSA clade, which hampers studies on the origin and transmission routes. Recently, a new molecular analysis technique named whole genome mapping was introduced. This method creates high-resolution, ordered whole genome restriction maps that may have potential for strain typing. In this study, we assessed and validated the capability of whole genome mapping to differentiate LA-MRSA isolates. Multiple validation experiments showed that whole genome mapping produced highly reproducible results. Assessment of the technique on two well-documented MRSA outbreaks showed that whole genome mapping was able to confirm one outbreak, but revealed major differences between the maps of a second, indicating that not all isolates belonged to this outbreak. Whole genome mapping of LA-MRSA isolates that were epidemiologically unlinked provided a much higher discriminatory power than spa-typing or MLVA. In contrast, maps created from LA-MRSA isolates obtained during a proven LA-MRSA outbreak were nearly indistinguishable showing that transmission of LA-MRSA can be detected by whole genome mapping. Finally, whole genome maps of LA-MRSA isolates originating from two unrelated veterinarians and their household members showed that veterinarians may carry and transmit different LA-MRSA strains at the same time. No such conclusions could be drawn based spa-typing and MLVA. Although PFGE seems to be suitable for molecular typing of LA-MRSA, WGM provides a much higher discriminatory power. Furthermore, whole genome mapping can provide a comparison with other maps within 2 days after the bacterial culture is received, making it suitable to investigate transmission events and outbreaks caused by LA-MRSA.