Methicillin-resistant Staphylococcus aureus emerged long before the introduction of methicillin into clinical practice

@AnttiKarkman @MikaelNiku @Pyrynestori @Kata_MMP En oo vieläkään ehtiny lukee kun vaan vähän selata. Mutta tää on osoitettu aikasemmin, en tiedä viitataanko esim tähän. https://t.co/BT3aCef7iV

@tweettruth2me yes. for example Methicillin-resistant Staphylococcus aureus (MRSA) in 1960, less than 1 year after the introduction of this second generation beta-lactam antibiotic into clinical practice. Yes it's a bacteria and not a virus but it still ca

8/ Each MRSA bacterium contains a mobile genetic element known as the staphylococcal cassette chromosomal mec (SCCmec). SCCmec contains the mecA gene which encodes a penicillin binding protein 2a (PBP2a). It is PBP2a that confers resistance. https://t.co

@LynnSosnoskie Interesting. Similarly the gene that confers methicillin resistance in MRSA arose before the use of methicillin. https://t.co/LDjlRMtnI3